Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	Jan. 31, 2011	Mar. 11, 2011	Jul. 31, 2010
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Trading Symbol	ADSK
Entity Registrant Name	AUTODESK INC
Entity Central Index Key	0000769397
Current Fiscal Year End Date	--01-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		227,900,000
Entity Public Float			$ 6,700,000,000

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Net revenue:
License and other	$ 1,172.1	$ 980.7	$ 1,603.4
Maintenance	779.7	733.0	711.8
Total net revenue	1,951.8	1,713.7	2,315.2
Cost of revenue:
Cost of license and other revenue	162.2	172.0	203.7
Cost of maintenance revenue	34.4	19.8	15.4
Total cost of revenue	196.6	191.8	219.1
Gross profit	1,755.2	1,521.9	2,096.1
Operating expenses:
Marketing and sales	776.0	731.9	900.7
Research and development	496.2	457.5	576.1
General and administrative	200.8	197.7	205.7
Impairment of goodwill and intangibles		21.0	128.9
Restructuring	10.8	48.2	40.2
Total operating expenses	1,483.8	1,456.3	1,851.6
Income from operations	271.4	65.6	244.5
Interest and other income, net	0.6	19.1	8.0
Income before income taxes	272.0	84.7	252.5
Provision for income taxes	(60.0)	(26.7)	(68.9)
Net income	$ 212.0	$ 58.0	$ 183.6
Basic net income per share	$ 0.93	$ 0.25	$ 0.81
Diluted net income per share	$ 0.90	$ 0.25	$ 0.80
Shares used in computing basic net income per share	227.6	228.7	225.5
Shares used in computing diluted net income per share	234.2	232.1	230.1

CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010
Current assets:
Cash and cash equivalents	$ 1,075.1	$ 838.7
Marketable securities	199.2	161.9
Accounts receivable, net	318.4	277.4
Deferred income taxes	56.8	44.2
Prepaid expenses and other current assets	64.8	57.4
Total current assets	1,714.3	1,379.6
Marketable securities	192.6	125.6
Computer equipment, software, furniture and leasehold improvements, net	84.5	101.6
Purchased technologies, net	57.2	88.0
Goodwill	554.1	542.9
Deferred income taxes, net	90.7	101.9
Other assets	94.2	107.6
Assets, Total	2,787.6	2,447.2
Current liabilities:
Accounts payable	76.8	67.8
Accrued compensation	193.1	115.6
Accrued income taxes	28.6	8.4
Deferred revenue	496.2	444.6
Other accrued liabilities	75.1	67.6
Total current liabilities	869.8	704.0
Deferred revenue	91.7	71.9
Long term income taxes payable	139.1	127.2
Other liabilities	77.7	70.6
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.01 par value; shares authorized 2.0; none issued or outstanding at January 31, 2011 and 2010
Common stock and additional paid-in capital, $0.01 par value; shares authorized 750.0; 227.0 outstanding at January 31, 2011 and 228.9 outstanding at January 31, 2010	1,267.2	1,204.3
Accumulated other comprehensive income (loss)	(0.6)	(3.5)
Retained earnings	342.7	272.7
Total stockholders' equity	1,609.3	1,473.5
Liabilities and Stockholders' Equity, Total	$ 2,787.6	$ 2,447.2

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2.0	2.0
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	750.0	750.0
Common stock, shares outstanding	227.0	228.9

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Operating Activities
Net income	$ 212.0	$ 58.0	$ 183.6
Adjustments to reconcile net income to net cash provided by operating activities:
Charge for acquired in-process research and development			26.9
Depreciation and amortization	105.4	111.5	91.8
Stock-based compensation expense	80.7	93.6	89.5
Impairment of goodwill and intangibles		21.0	128.9
Restructuring charges, net	10.8	48.2	38.9
Changes in operating assets and liabilities, net of business combinations:
Accounts receivable	(40.7)	37.3	81.8
Deferred income taxes	(2.1)	(13.5)	(13.8)
Prepaid expenses and other current assets	(12.9)	4.4	(7.8)
Accounts payable and accrued liabilities	83.7	(80.3)	(93.6)
Deferred revenue	71.5	(34.0)	40.8
Accrued income taxes	32.4	0.6	26.9
Net cash provided by operating activities	540.8	246.8	593.9
Investing Activities
Purchases of marketable securities	(507.2)	(568.9)	(118.6)
Sales of marketable securities	135.3	26.4	75.0
Maturities of marketable securities	275.4	328.7	8.4
Business combinations, net of cash acquired	(13.5)	(18.8)	(364.5)
Capital expenditures	(28.3)	(39.0)	(78.4)
Purchase of equity investment	(4.0)	(11.4)
Net cash used in investing activities	(142.3)	(283.0)	(478.1)
Financing Activities
Proceeds from issuance of common stock, net of issuance costs	120.9	70.0	90.1
Repurchases of common stock	(280.3)	(63.2)	(256.6)
Draws on line of credit		2.2	912.4
Repayments of line of credit		(54.3)	(860.3)
Net cash used in financing activities	(159.4)	(45.3)	(114.4)
Effect of exchange rate changes on cash and cash equivalents	(2.7)	2.6	(1.7)
Net increase (decrease) in cash and cash equivalents	236.4	(78.9)	(0.3)
Cash and cash equivalents at beginning of fiscal year	838.7	917.6	917.9
Cash and cash equivalents at end of fiscal year	1,075.1	838.7	917.6
Supplemental cash flow information:
Net cash paid during the year for income taxes	32.5	42.1	63.4
Supplemental non-cash investing activity:
Increase in goodwill and corresponding change in other accrued liabilities resulting from adjustments to purchase accounting estimates		$ 0.7	$ 2.8

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Common stock and additional paid-in capital	Comprehensive Income	Accumulated other comprehensive income (loss)	Retained earnings
Beginning Balance at Jan. 31, 2008	$ 1,230.5	$ 998.3		$ 13.8	$ 218.4
Beginning Balance (in shares) at Jan. 31, 2008		230.0
Common shares issued under stock award and stock purchase plans (in shares)		4.4
Common shares issued under stock award and stock purchase plans	90.1	90.1
Compensation expense related to stock options	89.5	89.5
Tax benefits from employee stock plans	(1.4)	(1.4)
Repurchase and retirement of common shares (in shares)		(8.0)
Comprehensive income:
Net income	183.6		183.6		183.6
Other comprehensive income, net of tax:
Net gain (loss) on derivative instruments, net of tax			(0.2)
Change in net unrealized gain on marketable securities, net of tax			0.4
Net change in cumulative foreign currency translation gain (loss)			(25.2)
Other comprehensive income (loss)	(25.0)		(25.0)	(25.0)
Comprehensive income (loss)			158.6
Repurchase and retirement of common shares	(256.6)	(96.1)			(160.5)
Ending Balance at Jan. 31, 2009	1,310.7	1,080.4		(11.2)	241.5
Ending Balance (in shares) at Jan. 31, 2009		226.4
Common shares issued under stock award and stock purchase plans (in shares)		5.2
Common shares issued under stock award and stock purchase plans	70.4	70.4
Compensation expense related to stock options	93.6	93.6
Tax benefits from employee stock plans	(3.7)	(3.7)
Repurchase and retirement of common shares (in shares)		(2.7)
Comprehensive income:
Net income	58.0		58.0		58.0
Other comprehensive income, net of tax:
Net gain (loss) on derivative instruments, net of tax			2.5
Change in net unrealized gain on marketable securities, net of tax			1.5
Change in unfunded portion of pension plans			(5.9)
Net change in cumulative foreign currency translation gain (loss)			9.6
Other comprehensive income (loss)	7.7		7.7	7.7
Comprehensive income (loss)			65.7
Repurchase and retirement of common shares	(63.2)	(36.4)			(26.8)
Ending Balance at Jan. 31, 2010	1,473.5	1,204.3		(3.5)	272.7
Ending Balance (in shares) at Jan. 31, 2010	228.9	228.9
Common shares issued under stock award and stock purchase plans (in shares)		7.1
Common shares issued under stock award and stock purchase plans	120.9	120.9
Compensation expense related to stock options	80.7	80.7
Tax benefits from employee stock plans	(0.4)	(0.4)
Repurchase and retirement of common shares (in shares)		(9.0)
Comprehensive income:
Net income	212.0		212.0		212.0
Other comprehensive income, net of tax:
Net gain (loss) on derivative instruments, net of tax			(3.1)
Change in net unrealized gain on marketable securities, net of tax			0.9
Change in unfunded portion of pension plans			(3.9)
Net change in cumulative foreign currency translation gain (loss)			9.0
Other comprehensive income (loss)	2.9		2.9	2.9
Comprehensive income (loss)			214.9
Repurchase and retirement of common shares	(280.3)	(138.3)			(142.0)
Ending Balance at Jan. 31, 2011	$ 1,609.3	$ 1,267.2		$ (0.6)	$ 342.7
Ending Balance (in shares) at Jan. 31, 2011	227.0	227.0

Business and Summary of Significant Accounting Policies

12 Months Ended

Jan. 31, 2011

Business and Summary of Significant Accounting Policies

Note 1. Business and Summary of Significant Accounting Policies

Business

Autodesk, Inc. (“Autodesk” or the “Company”) is a world leading design software and services company, offering customers productive business solutions through powerful technology products and services. The Company serves customers in the architecture, engineering and construction; manufacturing; and digital media and entertainment markets. The Company’s sophisticated software products enable its customers to experience their ideas before they are real by allowing them to create and document their designs and to visualize, simulate and analyze real-world performance early in the design process by creating digital prototypes. These capabilities allow Autodesk’s customers to optimize and improve their designs, help save time and money, improve quality and foster innovation. Autodesk software products are sold globally, both directly to customers and through a network of resellers and distributors.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Autodesk and its wholly-owned and majority-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.

Reclassifications

During the first quarter of fiscal 2011, Autodesk reclassified certain costs of revenue, which primarily included reclassifying shipping and fulfillment expenses from “Cost of license and other revenue” to “Cost of maintenance revenue,” due to a change in the Company’s cost allocation methodology. These expenses have been reclassified in the Consolidated Statements of Operations for the fiscal years ended January 31, 2010 and 2009, to conform to the current period presentation as follows:


	2010			2009
Increase (Decrease) to Expense
Cost of license and other revenue	$	(7.9	)	$	(6.5	)
Cost of maintenance revenue		7.9			6.5

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in Autodesk’s consolidated financial statements and notes thereto. These estimates are based on information available as of the date of the consolidated financial statements. On a regular basis, management evaluates these estimates and assumptions. Actual results may differ materially from these estimates.

Examples of significant estimates and assumptions made by management involve the determination of the fair value of goodwill, financial instruments, long-lived assets and other intangible assets, the realizability of deferred tax assets and the fair value of stock awards (see “Stock-Based Compensation Expense” within this Note 1 and Note 4 “Employee and Director Stock Plans,” for further discussion). We also make assumptions, judgments and estimates in determining the accruals for uncertain tax positions, variable compensation, partner incentive programs, product returns reserves, allowances for doubtful accounts, asset retirement obligations and legal contingencies.

Foreign Currency Translation

The assets and liabilities of Autodesk’s foreign subsidiaries are translated from their respective functional currencies into U.S. dollars at the rates in effect at the balance sheet date, and revenue and expense amounts are translated at weighted average rates during the period. Foreign currency translation adjustments are recorded as other comprehensive income (loss).

Gains and losses realized from foreign currency transactions, those transactions denominated in currencies other than the foreign subsidiary’s functional currency, are included in interest and other income, net.

Derivative Financial Instruments

Under its risk management strategy, Autodesk uses derivative instruments to manage its short-term exposures to fluctuations in foreign currency exchange rates which exist as part of ongoing business operations. Autodesk’s general practice is to hedge a majority of transaction exposures denominated in euros, Japanese yen, Swiss francs, British pounds and Canadian dollars. These instruments have maturities between one to 12 months in the future. Autodesk does not enter into any derivative instruments for trading or speculative purposes.

Autodesk utilizes foreign currency contracts to reduce the exchange rate impact on a portion of the net revenue or operating expense of certain anticipated transactions. These contracts, which are designated and documented as cash flow hedges, qualify for hedge accounting treatment. The effectiveness of the cash flow hedge contracts is assessed quarterly using regression analysis as well as other timing and probability criteria. To receive cash flow hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge and the hedges are expected to be highly effective in offsetting changes to future cash flows on hedged transactions. The gross gains and losses on these hedges are included in “Accumulated other comprehensive income (loss)” and are reclassified into earnings at the time the forecasted revenue or expense is recognized. In the event the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, Autodesk reclassifies the gain or loss on the related cash flow hedge from “Accumulated other comprehensive income (loss)” to “Interest and other income, net” in the Company’s Consolidated Financial Statements at that time.

In addition to the cash flow hedges described above, contracts which are not designated as hedging instruments are marked-to-market at the end of each fiscal quarter, with gains and losses recognized as other income or expense, net. These derivative instruments do not subject the Company to material balance sheet risk due to exchange rate movements because gains and losses on these derivative instruments are intended to offset the gains or losses resulting from the settlement of the underlying foreign currency denominated receivables and payables.

The bank counterparties in all contracts expose Autodesk to credit-related losses in the event of their nonperformance. However, to mitigate that risk, Autodesk only contracts with counterparties who meet the Company’s minimum requirements under its counterparty risk assessment process. Autodesk monitors ratings, credit spreads and potential downgrades on at least a quarterly basis. Based on Autodesk’s on-going assessment of counterparty risk, the Company will adjust its exposure to various counterparties.

Cash and Cash Equivalents

Autodesk considers all highly liquid investments with insignificant interest rate risk and remaining maturities of three months or less at the date of purchase to be cash equivalents. Cash equivalents are recorded at cost, which approximates fair value.

Marketable Securities

Marketable securities are stated at fair value. Marketable securities maturing within one year that are not restricted are classified as current assets. Auction rate securities with an estimated fair value of $4.2 million at January 31, 2011 are classified as non-current marketable securities; for additional information see Note 2, “Financial Instruments and Hedging Activities.”

Autodesk determines the appropriate classification of its marketable securities at the time of purchase and re-evaluates such classification as of each balance sheet date. Autodesk carries all “available-for-sale securities” at fair value, with unrealized gains and losses, net of tax, reported in stockholders’ equity until disposition or maturity. Autodesk carries all “trading securities” at fair value, with unrealized gains and losses, recorded in “Interest and other income, net” in the Company’s Consolidated Statements of Operations.

All of Autodesk’s marketable securities are subject to a periodic impairment review. The Company recognizes an impairment charge when a decline in the fair value of its investments below the cost basis is judged to be other-than-temporary. Autodesk considers various factors in determining whether to recognize an impairment charge, including the length of time and extent to which the fair value has been less than Autodesk’s cost basis, the financial condition and near-term prospects of the investee, and Autodesk’s intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in the market value. Autodesk did not record any other-than temporary impairment charges during fiscal 2011 and fiscal 2010. For additional information, see “Concentration of Credit Risk” within this Note 1 and Note 2, “Financial Instruments and Hedging Activities.”

Accounts Receivable, Net

Accounts receivable, net, consisted of the following as of January 31:


	2011			2010
Trade accounts receivable	$	363.0		$	316.5
Less: Allowance for doubtful accounts		(4.2	)		(4.6	)
Product returns reserve		(10.6	)		(11.8	)
Partner programs and other obligations		(29.8	)		(22.7	)

Accounts receivable, net	$	318.4		$	277.4

Allowances for uncollectible trade receivables are based upon historical loss patterns, the number of days that billings are past due and an evaluation of the potential risk of loss associated with problem accounts.

The product returns reserves are based on historical experience of actual product returns, estimated channel inventory levels, the timing of new product introductions, channel sell-in for applicable markets and other factors.

Partner program and other obligations are primarily related to partner incentives that use quarterly attainment monetary rewards to motivate distributors and resellers to achieve mutually agreed upon business goals in a specified time period.

Concentration of Credit Risk

Autodesk places its cash, cash equivalents and marketable securities in highly liquid instruments with, and in the custody of, financial institutions with high credit ratings and limits the amounts invested with any one institution, type of security and issuer.

Geographical concentrations of consolidated cash, cash equivalents and marketable securities held by Autodesk as of January 31:


	2011			2010
United States		14	%		12	%
Other Americas		1	%		2	%
Europe, Middle East and Africa (“EMEA”)		49	%		48	%
Asia Pacific (“APAC”)		36	%		38	%

Autodesk’s primary commercial banking relationship is with Citibank and its global affiliates (“Citibank”). The Company’s cash and cash equivalents are held by diversified financial institutions globally. Citicorp USA, Inc., an affiliate of Citibank, is the lead lender and agent in the syndicate of Autodesk’s $250.0 million U.S. line of credit facility.

At January 31, 2011, Autodesk’s investment portfolio included auction rate securities with an estimated fair value of $4.2 million. See Note 2, “Financial Instruments and Hedging Activities,” for further discussion of Autodesk’s financial instruments including its auction rate securities.

Autodesk’s accounts receivable are derived from sales to a large number of resellers, distributors and direct customers in the Americas; EMEA; and APAC geographies. Autodesk performs ongoing evaluations of its customers’ financial condition and limits the amount of credit extended when deemed necessary, but generally does not require collateral from such parties. Total sales to the distributor Tech Data Corporation, and its global affiliates (“Tech Data”), accounted for 16% of Autodesk’s consolidated net revenue in fiscal year ended 2011 and 14% for the fiscal years ended 2010 and 2009. The majority of the net revenue from sales to Tech Data relates to Autodesk’s Platform Solutions and Emerging Business segment and is for sales made outside of the United States. In addition, Tech Data accounted for 16% and 15% of trade accounts receivable at January 31, 2011 and 2010, respectively. Autodesk believes its business is not substantially dependent on Tech Data. Autodesk’s actual customers through Tech Data are the resellers and end users who purchase Autodesk’s software licenses and services. Should any of the agreements between Autodesk and Tech Data be terminated for any reason, Autodesk believes that arrangements could be made so that the resellers and end users who currently purchase Autodesk’s products through Tech Data would be able to continue to do so under substantially the same terms from one of the many other distributors of Autodesk without substantial disruption to Autodesk.

Computer Equipment, Software, Furniture and Leasehold Improvements, Net

Computer equipment, software and furniture are depreciated using the straight-line method over the estimated useful lives of the assets, which range from two to five years. Leasehold improvements are amortized on a straight-line basis over the shorter of their estimated useful lives or the lease term. Depreciation expense was $47.6 million in fiscal 2011, $50.4 million in fiscal 2010 and $46.2 million in fiscal 2009.

Computer equipment, software, furniture, leasehold improvements and the related accumulated depreciation at January 31 were as follows:


	2011			2010
Computer software, at cost	$	129.4		$	127.3
Computer hardware, at cost		123.7			108.5
Leasehold improvements, land and buildings, at cost		121.3			113.7
Furniture and equipment, at cost		43.6			42.9

		418.0			392.4
Less: Accumulated depreciation		(333.5	)		(290.8	)

Computer software, hardware, leasehold improvements, furniture and equipment, net	$	84.5		$	101.6

Costs incurred for computer software developed or obtained for internal use are capitalized for application development activities, if material, and immediately expensed for preliminary project activities and post-implementation activities. These capitalized costs are amortized over the software’s expected useful life, which is generally three years.

Software Development Costs

Software development costs incurred prior to the establishment of technological feasibility are included in research and development expenses. Autodesk defines establishment of technological feasibility as the completion of a working model. Software development costs incurred subsequent to the establishment of technological feasibility through the period of general market availability of the products are capitalized and generally amortized over a one year period, if material. Autodesk had no capitalized software development costs at January 31, 2011 and January 31, 2010.

Other Intangible Assets, Net

Other intangible assets include purchased technologies, customer relationships, trade names and the related accumulated amortization. These assets are shown as “Purchased technologies, net” and as part of “Other assets” in the Consolidated Balance Sheet. The majority of Autodesk’s other intangible assets are amortized to expense over the estimated economic life of the product, which ranges from two to seven years. Amortization expense for purchased technologies, customer relationships and trade names, which is included as a component of cost of revenue, was $57.8 million in fiscal 2011, $61.2 million in fiscal 2010 and $41.5 million in fiscal 2009.

Other intangible assets and related accumulated amortization at January 31 were as follows:


	2011			2010
Purchased technologies, at cost(1)	$	313.1		$	311.5
Customer relationships and trade names, at cost(2)		179.1			176.5

		492.2			488.0
Less: Accumulated amortization		(373.4	)		(314.9	)

Other intangible assets, net	$	118.8		$	173.1

(1)

Purchased technologies include zero and $4.3 million of in-process research and development technology as of January 31, 2011 and January 31, 2010, respectively. During fiscal 2011, $4.3 million of in-process research and development assets reached the stage of fully developed technology and began being amortized to expense. In-process research and development is an indefinite lived asset that is held and tested at least annually for impairment until such time that it becomes fully developed technology. Once completed, the technology is amortized to expense over an applicable useful life. Prior to February 1, 2009, Autodesk expensed in-process research and development to research and development expense in the period it was acquired.

(2)

Customer relationships and trade names are included in “Other assets” in the Consolidated Balance Sheet.

The weighted average amortization period for purchased technologies, customer relationships and trade names during fiscal 2011 was 3.2 years. Expected future amortization expense for purchased technologies, customer relationships and trade names for each of the fiscal years ended thereafter is as follows:


	Year ending January 31,
2012	$	50.7
2013		37.0
2014		20.3
2015		8.5
2016		2.2
Thereafter		0.1

Total	$	118.8

Goodwill

Goodwill consists of the excess of cost over the fair value of net assets acquired in business combinations. Autodesk assigns goodwill to the reportable segment associated with each business combination, and tests goodwill for impairment annually in its fourth fiscal quarter or more often if circumstances indicate a potential impairment. When assessing goodwill for impairment, Autodesk uses discounted cash flow models that include assumptions regarding reportable segments’ projected cash flows (“Income Approach”) and corroborates it with the estimated consideration that the Company would receive if there were to be a sale of the reporting segment (“Market Approach”). Variances in these assumptions could have a significant impact on Autodesk’s conclusion as to whether goodwill is impaired or the amount of any impairment charge. Impairment charges, if any, result from instances where the fair values of net assets associated with goodwill are less than their carrying values. The process of evaluating the potential impairment of goodwill is subjective and requires significant judgment at many points during the analysis. The value of Autodesk’s goodwill could also be impacted by future adverse changes such as: (i) declines in Autodesk’s actual financial results, (ii) a sustained decline in Autodesk’s market capitalization, (iii) significant slowdown in the worldwide economy or the industries Autodesk serves, or (iv) changes in Autodesk’s business strategy or internal financial results forecasts. There was no impairment of goodwill during the year ended January 31, 2011. A hypothetical 10% decrease in the fair value of Autodesk’s Platform Solutions and Emerging Business; Manufacturing; Architecture, Engineering and Construction; or Media and Entertainment reporting units would not have an impact on the carrying value, nor result in an impairment, of goodwill shown on Autodesk’s balance sheet as of January 31, 2011 for the respective reporting units.

During the fiscal year ended 2010, Autodesk recorded an impairment charge of $21.0 million, representing the entire goodwill balance of the Media and Entertainment (“M&E”) segment as of April 30, 2009. During the fiscal year ended January 31, 2009, the carrying value of M&E was deemed to exceed the allocated fair value and Autodesk recorded a $128.2 million goodwill impairment charge. Should our revenue and cash flow projections decline significantly in the future, additional impairment charges may be recorded to goodwill.

The change in the carrying amount of goodwill during the year ended January 31, 2011 is as follows:


	Platform Solutions and Emerging Business		Architecture, Engineering and Construction			Manufacturing		Media and Entertainment			Total
Balance as of January 31, 2010
Goodwill	$	40.2	$	224.8		$	277.9	$	149.2		$	692.1
Accumulated impairment losses		—		—			—		(149.2	)		(149.2	)

		40.2		224.8			277.9		—			542.9

Goodwill acquired during the year		4.6		—			—		5.5			10.1
Effect of foreign currency translation, purchase accounting adjustments and other		0.5		(0.6	)		1.2		—			1.1

Balance as of January 31, 2011
Goodwill		45.3		224.2			279.1		154.7			703.3
Accumulated impairment losses		—		—			—		(149.2	)		(149.2	)

	$	45.3	$	224.2		$	279.1	$	5.5		$	554.1

The change in the carrying amount of goodwill during the year ended January 31, 2010 is as follows:


	Platform Solutions and Emerging Business			Architecture, Engineering and Construction		Manufacturing		Media and Entertainment			Total
Balance as of January 31, 2009
Goodwill	$	36.3		$	209.4	$	275.8	$	149.2		$	670.7
Accumulated impairment losses		—			—		—		(128.2	)		(128.2	)

		36.3			209.4		275.8		21.0			542.5

Impairment		—			—		—		(21.0	)		(21.0	)
Goodwill acquired during the year		14.1			3.0		—		—			17.1
Transfer of assets between segments		(10.1	)		10.1		—		—			—
Effect of foreign currency translation, purchase accounting adjustments and other		(0.1	)		2.3		2.1		—			4.3

Balance as of January 31, 2010
Goodwill		40.2			224.8		277.9		149.2			692.1
Accumulated impairment losses		—			—		—		(149.2	)		(149.2	)

	$	40.2		$	224.8	$	277.9	$	—		$	542.9

Purchase accounting adjustments reflect revisions made to the Company’s preliminary purchase price allocation during fiscal 2011 and 2010.

Impairment of Long-Lived Assets

At least annually or more frequently as circumstances dictate, Autodesk assesses the recoverability of its long-lived assets by comparing the estimated fair value of such assets against their respective carrying values. Fair value is estimated using the future undiscounted net cash flows associated with the assets. Impairment, if any, is based on the excess of the carrying value over the fair value. There was no impairment of long-lived assets during the years ended January 31, 2011 and 2010.

In addition to the recoverability assessments, Autodesk routinely reviews the remaining estimated useful lives of its long-lived assets. Any reduction in the useful life assumption will result in increased depreciation and amortization expense in the quarter when such determinations are made, as well as in subsequent quarters.

Deferred Tax Assets

Deferred tax assets arise primarily from tax credits, net operating losses, and timing differences for reserves, accrued liabilities, stock options, purchased technologies and capitalized intangibles, partially offset by the establishment of U.S. deferred tax liabilities on unremitted earnings from certain foreign subsidiaries, deferred tax liabilities associated with tax method change on advance payments, and a valuation allowance against California and Canadian deferred tax assets. They are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to reverse. Valuation allowances are established when necessary to reduce gross deferred tax assets to the amount “more likely than not” expected to be realized.

Revenue Recognition

Autodesk recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price is fixed or determinable, and collection is probable. For multiple element arrangements that include software products, Autodesk allocates the sales price among each of the deliverables using the residual method, under which revenue is allocated to undelivered elements based on their vendor-specific objective evidence (“VSOE”) of fair value. VSOE is the price charged when an element is sold separately or a price set by management with the relevant authority. If Autodesk does not have VSOE of an undelivered software license, revenue recognition is deferred on the entire sales arrangement until all elements for which Autodesk does not have VSOE are delivered. If Autodesk does not have VSOE for undelivered maintenance or services, the revenue for the arrangement is recognized over the longest contractual period in the arrangement. Revenue recognition for significant lines of business is discussed further below.

Autodesk’s assessment of likelihood of collection is also a critical element in determining the timing of revenue recognition. If collection is not probable, the revenue will be deferred until the earlier of when collection is deemed probable or cash is received.

License and other revenue are comprised of two components: (1) all forms of product license revenue and (2) other revenue:

(1) All Forms of Product License Revenue

Product license revenue includes: software license revenue from the sale of new seat licenses, upgrades and crossgrades, product revenue for Creative Finishing sales wherein software is bundled with hardware components, and revenue from on-demand collaboration software and services. Autodesk’s existing customers who are using a currently supported version of a product can upgrade to the latest release of the product by paying a separate fee at current available prices. An existing customer also has the option to upgrade to a vertical design or model-based design product, which generally has a higher price, for a premium fee; this is referred to as a crossgrade.

Autodesk’s product license revenue from distributors and resellers is generally recognized at the time title to Autodesk’s product passes to the distributor or reseller, provided all other criteria for revenue recognition are met.

Autodesk establishes reserves for product returns based on historical experience of actual product returns, estimated channel inventory levels, the timing of new product introductions, channel sell-in for applicable markets and other factors. These reserves are recorded as a direct reduction of revenue and accounts receivable at the time the related revenue is recognized.

(2) Other Revenue

Other revenue includes revenue from consulting, training, Autodesk Developers Network and Creative Finishing customer support, and is recognized over time, as the services are performed.

Maintenance Revenue

Maintenance revenue consists of revenue from the Company’s maintenance program. Under this program, customers are eligible to receive unspecified upgrades when-and-if-available, downloadable training courses and on-line support. Autodesk recognizes maintenance revenue from its maintenance program ratably over the maintenance service contract periods.

Taxes Collected from Customers

Autodesk nets taxes collected from customers against those remitted to government authorities in our financial statements. Accordingly, taxes collected from customers are not reported as revenue.

Shipping and Handling Costs

Shipping and handling costs are included in cost of revenue for all periods presented.

Stock-based Compensation Expense

On the date of grant, Autodesk measures the fair value of all stock-based payments (including grants of stock options, employee stock purchases related to the employee stock purchase plan (“ESP Plan”), and restricted stock) to employees and directors and records the related expense in Autodesk’s Consolidated Statements of Operations. The estimated fair value of stock-based awards is amortized to expense on a straight-line basis over the awards’ vesting period. The following table summarizes stock-based compensation expense for fiscal 2011, 2010 and 2009, respectively, as follows:


	Fiscal Year Ended January 31,
	2011			2010			2009
Cost of license and other revenue	$	2.9		$	3.1		$	3.6
Marketing and sales		35.5			41.1			39.2
Research and development		27.4			30.0			29.3
General and administrative		14.9			19.4			17.4

Stock-based compensation expense related to stock awards and ESP Plan purchases		80.7			93.6			89.5
Tax benefit		(22.0	)		(22.2	)		(21.6	)

Stock-based compensation expense related to stock awards and ESP Plan purchases	$	58.7		$	71.4		$	67.9

In fiscal 2010, Autodesk identified errors in the calculation of stock-based compensation expense. The Company had been incorrectly calculating stock-based compensation expense by applying a weighted average forfeiture rate to the vested portion of stock option awards until the grant’s final vest date rather than calculating stock based compensation expense based upon the actual vested portion of the grant date fair value, resulting in an understatement of stock-based compensation expense in certain periods prior to the grant’s vest date. The cumulative error from the understatement of stock-based compensation expense related to the periods prior to fiscal 2010 totaled $6.8 million, net of tax effects. Accordingly, additional expenses of $0.4 million for Cost of license and other revenue, $4.4 million for Marketing and sales, $2.9 million for Research and development, $2.1 million for General and Administrative and $3.0 million for additional tax benefit are included in the stock-based compensation expenses in the table above for the fiscal year ended January 31, 2010.

Autodesk uses the Black-Scholes-Merton option-pricing model to estimate the fair value of stock-based awards based on the following assumptions:


	Fiscal Year Ended January 31, 2011		Fiscal Year Ended January 31, 2010		Fiscal Year Ended January 31, 2009
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	40 - 45%	33 - 47%	43 - 55%	43 - 73%	37 - 55%	36 - 41%
Range of expected lives (in years)	2.6 - 4.4	0.5 - 2.0	2.7 - 4.0	0.5 - 2.0	2.6 - 4.0	0.5 - 2.0
Expected dividends	0%	0%	0%	0%	0%	0%
Range of risk-free interest rates	0.84 - 1.85%	0.20 - 1.05%	1.02 - 2.42%	0.20 - 0.98%	1.01 - 3.40%	1.29 - 1.85%
Expected forfeitures	10.5 - 13.5%	10.5 - 13.5%	13.5%	13.5%	13.6%	13.6%

Autodesk estimates expected volatility for stock-based awards based on the average of the following two measures. The first is a measure of historical volatility in the trading market for the Company’s common stock, and the second is the implied volatility of traded forward call options to purchase shares of the Company’s common stock.

Autodesk estimates the expected life of stock-based awards using both exercise behavior and post-vesting termination behavior as well as consideration of outstanding options.

Autodesk did not pay cash dividends in fiscal 2011, 2010 or 2009 and does not anticipate paying any cash dividends in the foreseeable future. Consequently, an expected dividend yield of zero is used in the Black-Scholes-Merton option pricing model.

The risk-free interest rate used in the Black-Scholes-Merton option pricing model for stock-based awards is the historical yield on U.S. Treasury securities with equivalent remaining lives.

Autodesk recognizes expense only for the stock-based awards that are ultimately expected to vest. Therefore, Autodesk has developed an estimate of the number of awards expected to cancel prior to vesting (“forfeiture rate”). The forfeiture rate is estimated based on historical pre-vest cancellation experience and is applied to all stock-based awards. The Company estimates forfeitures at the time of grant and revises those estimates in subsequent periods if actual forfeitures differ from those estimates.

Advertising Expenses

Advertising costs are expensed as incurred. Total advertising expenses incurred were $18.8 million in fiscal 2011, $18.4 million in fiscal 2010 and $16.4 million in fiscal 2009.

Net Income Per Share

Basic net income per share is computed based on the weighted average number of shares of common stock outstanding for the period, including restricted stock awards and excluding stock options and restricted stock units. Diluted net income per share is computed based upon the weighted average shares of common shares outstanding for the period and potentially dilutive common shares, including the effect of stock options and restricted stock units under the treasury stock method.

Accounting Standards Adopted in Fiscal 2011

With the exception of those discussed below, there have been no recent accounting pronouncements or changes in accounting pronouncements during the fiscal year ended January 31, 2011 that are of significance or potential significance to the Company.

Recently Issued Accounting Standards

In December 2010, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2010-29 regarding Accounting Standards Codification (“ASC”) Topic 805 “Business Combinations.” This ASU updates accounting guidance to clarify that pro forma disclosures should be presented as if a business combination occurred at the beginning of the prior annual period for purposes of preparing both the current reporting period and the prior reporting period pro forma financial information. These disclosures should be accompanied by a narrative description about the nature and amount of material, nonrecurring pro forma adjustments. The new accounting guidance is effective for business combinations consummated in periods beginning after December 15, 2010, and should be applied prospectively as of the date of adoption. Early adoption is permitted. Autodesk will adopt the new disclosures under ASU 2010-29 effective February 1, 2011. Autodesk believes that the adoption of this guidance will not have a material impact on its consolidated statements of financial position, results of operations or cash flows. The impact of ASU 2010-29 on Autodesk’s disclosures will be dependent on the size of the business combinations that it consummates subsequent to the adoption of the standard.

In December 2010, the FASB issued ASU 2010-28 regarding ASC Topic 350 “Intangibles – Goodwill and Other.” This ASU updates accounting guidance related to the calculation of the carrying amount of a reporting unit when performing the first step of a goodwill impairment test. More specifically, this update will require an entity to use an equity premise when performing the first step of a goodwill impairment test and if a reporting unit has a zero or negative carrying amount, the entity must assess and consider qualitative factors and whether it is more likely than not that a goodwill impairment exists. The new accounting guidance is effective for public entities, for impairment tests performed during entities’ fiscal years (and interim periods within those years) that begin after December 15, 2010. Autodesk will adopt the changes under ASU 2010-28 effective February 1, 2011. Autodesk believes that the adoption of this guidance will not have a material impact on its consolidated statements of financial position, results of operations or cash flows.

In January 2010, the FASB issued ASU 2010-06 regarding ASC Topic 820 “Fair Value Measurements and Disclosures.” This ASU requires additional disclosure regarding significant transfers in and out of Levels 1 and 2 fair value measurements and the reasons for the transfers. In addition, this ASU requires the Company to present separately information about purchases, sales, issuances, and settlements (on a gross basis rather than as one net number) in the reconciliation for fair value measurements using significant unobservable inputs (Level 3). ASU 2010-06 clarifies existing disclosures regarding fair value measurement for each class of assets and liabilities and the valuation techniques and inputs used to measure fair value for recurring and nonrecurring fair value measurements that fall in either Level 2 or Level 3. This update also includes conforming amendments to the guidance on employers’ disclosures about postretirement benefit plan asset (Subtopic 715-20). The changes under ASU 2010-06 were effective for Autodesk’s fiscal year beginning February 1, 2010, except for the disclosures about purchases, sales, issuances and settlements in the roll forward of activity in Level 3 fair value measurements, which are effective for Autodesk’s fiscal year beginning February 1, 2011. The adoption of the portion of this ASU that was effective as of February 1, 2010 did not have a material impact on Autodesk’s consolidated statements of financial position, results of operations or cash flows. Autodesk believes that the adoption of the remaining portion of the ASU that is effective for Autodesk’s fiscal year beginning February 1, 2011 will not have a material impact on its consolidated statements of financial position, results of operations or cash flows.

In October 2009, the FASB issued ASU 2009-13 regarding ASC Subtopic 605-25 “Revenue Recognition—Multiple-element Arrangements.” This ASU addresses criteria for separating the consideration in multiple-element arrangements. ASU 2009-13 will require companies to allocate the overall consideration to each deliverable by using a best estimate of the selling price of individual deliverables in the arrangement in the absence of vendor-specific objective evidence or other third-party evidence of the selling price. In October 2009, the FASB also issued ASU 2009-14 regarding ASC Topic 985 “Software: Certain Revenue Arrangements That Include Software Elements.” This ASU modifies the scope of ASC Subtopic 985-605, “Software Revenue Recognition,” to exclude (a) non-software components of tangible products and (b) software components of tangible products that are sold, licensed or leased with tangible products when the software components and non-software components of the tangible product function together to deliver the tangible product’s essential functionality. The changes under ASU 2009-13 and 2009-14 will be effective prospectively for revenue arrangements entered into or materially modified in fiscal years beginning on or after June 15, 2010. Autodesk will adopt the changes under ASU 2009-13 and 2009-14 effective February 1, 2011. Autodesk believes that the adoption of ASU 2009-13 and 2009-14 will not have a material impact on its consolidated statements of financial position, results of operations or cash flows.

Financial Instruments and Hedging Activities

12 Months Ended

Jan. 31, 2011

Financial Instruments and Hedging Activities

Note 2. Financial Instruments and Hedging Activities

Financial Instruments

Market values were determined for each individual security in the investment portfolio. The cost and fair value of Autodesk’s financial instruments are as follows:


	January 31, 2011				January 31, 2010
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Cash and cash equivalents	$	1,075.1	$	1,075.1	$	838.7	$	838.7
Marketable securities—short-term		197.5		199.2		164.8		161.9
Marketable securities—long-term		190.8		192.6		124.4		125.6
Foreign currency forward and option contracts		3.9		3.9		2.3		3.9

Autodesk classifies its marketable securities as either short-term or long-term based on each instrument’s underlying contractual maturity date. Marketable securities with remaining maturities of less than 12 months are classified as short-term and marketable securities with remaining maturities greater than 12 months are classified as long-term. Autodesk may sell certain of its marketable securities prior to their stated maturities for strategic purposes or in anticipation of credit deterioration. Foreign currency forward and options contracts are included in “Prepaid expenses and other current assets” in the Consolidated Balance Sheets.

Autodesk has marketable securities that are classified as either “available-for-sale” or “trading securities.” At January 31, 2011 and January 31, 2010, Autodesk’s short-term investment portfolio included $31.3 million and $26.3 million, respectively, of “trading securities” invested in a defined set of mutual funds directed by the participants in the Company’s Deferred Compensation Plan. At January 31, 2011, these securities had net unrealized gains of $1.6 million and a cost basis of $29.7 million. At January 31, 2010, these securities had net unrealized losses of $3.1 million and a cost basis of $29.4 million (see Note 6, “Deferred Compensation”).

Marketable securities classified as “available-for-sale securities” include the following securities at January 31, 2011 and 2010:


	January 31, 2011
	Amortized Cost		Gross unrealized gains		Gross unrealized losses			Estimated Fair Value
Short-term available-for-sale securities:
Commercial paper and corporate securities	$	47.6	$	0.1	$	—		$	47.7
U.S. treasury securities		26.0		—		—			26.0
Certificates of deposit and time deposits		29.0		—		—			29.0
U.S. government agency securities		47.2		—		—			47.2
Sovereign debt		9.1		—		—			9.1
Municipal securities		8.6		—		—			8.6
Other		0.3		—		—			0.3

	$	167.8	$	0.1	$	—		$	167.9

Long-term available-for-sale securities:
Commercial paper and corporate securities	$	152.6	$	1.5	$	(0.1	)	$	154.0
U.S. government agency securities		12.7		0.2		—			12.9
Taxable auction-rate securities		4.2		—		—			4.2
Municipal securities		4.7		—		—			4.7
U.S. treasury securities		12.7		0.1		—			12.8
Sovereign debt		3.9		0.1		—			4.0

	$	190.8	$	1.9	$	(0.1	)	$	192.6


	January 31, 2010
	Amortized Cost		Gross unrealized gains		Gross unrealized losses		Estimated Fair Value
Short-term available-for-sale securities:
Commercial paper and corporate securities	$	88.8	$	0.2	$	—	$	89.0
Certificates of deposit and time deposits		24.6		—		—		24.6
Money market funds		10.0		—		—		10.0
U.S. government agency securities		8.8		—		—		8.8
Municipal securities		2.8		—		—		2.8
Other		0.4		—		—		0.4

	$	135.4	$	0.2	$	—	$	135.6

Long-term available-for-sale securities:
Corporate securities		94.9	$	1.0	$	—	$	95.9
U.S. government agency securities		9.1		0.1		—		9.2
Taxable auction-rate securities		7.6		—		—		7.6
Municipal securities		7.6		0.1		—		7.7
U.S. treasury securities		5.2		—		—		5.2

	$	124.4	$	1.2	$	—	$	125.6

The sales or redemptions of “available-for-sale securities” in fiscal 2011 resulted in a gain of $1.7 million. The sales or redemptions of “available-for-sale securities” for fiscal 2010 and 2009 resulted in no gains or losses. The cost of securities sold is based on the specific identification method. Proceeds from the sale and maturity of marketable securities were $410.7 million in fiscal 2011, $355.1 million in fiscal 2010 and $83.4 million in fiscal 2009.

At January 31, 2010, Autodesk was invested in The Reserve International Liquidity Fund (the “International Fund”) with an estimated fair value of $10.0 million. In mid-September of 2008, the International Fund ceased redemptions after net asset values of the funds decreased below $1 per share. This occurred as a result of the International Fund revaluing their holdings of debt securities issued by Lehman Brothers Holdings, Inc. (“Lehman Brothers”), which filed for Chapter 11 bankruptcy on September 15, 2008, and the resulting unusually high redemption requests on the International Fund. A third party court supervisor was appointed to oversee the accounting and payment administration of the International Fund. On November 30, 2010 a judge entered an order accepting a Settlement Agreement directing the distribution of the remaining funds. On January 20, 2011, Autodesk received substantially all of its holdings from the International Fund.

At January 31, 2011 and January 31, 2010, Autodesk owned auction rate securities with an estimated fair value of $4.2 million and $7.6 million respectively. During the fiscal year ended January 31, 2011, Autodesk redeemed one of its two auction rate securities with a fair value of $3.4 million. Autodesk’s remaining auction rate security is a variable rate debt instrument that has underlying securities with contractual maturities greater than ten years and interest rates that were structured to reset at auction every twenty-eight days. The security, which met Autodesk’s investment guidelines at the time the investment was made, has failed to settle in auction since August 2007 and has earned a premium interest rate since that time. While Autodesk expects to recover substantially all of its current holdings, net of reserves, in the auction rate security, it cannot predict when this will occur or the amount the Company will receive. Due to the lack of liquidity of this investment in an active market, it is included in non-current “Marketable securities” on the accompanying Consolidated Balance Sheets. The Company will continue to evaluate its accounting for this investment quarterly.

The following table summarizes the estimated fair value of our “available-for-sale securities” classified by the contractual maturity date of the security:


	January 31, 2011
	Cost		Fair Value
Due in 1 year	$	167.8	$	167.9
Due in 1 year through 5 years		186.6		188.4
Due in 5 years through 10 years		—		—
Due after 10 years		4.2		4.2

Total	$	358.6	$	360.5

As of January 31, 2011 and 2010, Autodesk did not have any securities in a continuous unrealized loss position for greater than twelve months.

Derivative Financial Instruments

Under its risk management strategy, Autodesk uses derivative instruments to manage its short-term exposures to fluctuations in foreign currency exchange rates which exist as part of ongoing business operations. Autodesk’s general practice is to hedge a majority of transaction exposures denominated in euros, Japanese yen, Swiss francs, British pounds and Canadian dollars. These instruments have maturities between one to twelve months in the future. Autodesk does not enter into any transactions for derivative instruments for trading or speculative purposes.

Cash Flow Hedges

Autodesk utilizes foreign currency contracts to reduce the exchange rate impact on a portion of the net revenue or operating expense of certain anticipated transactions. These contracts are designated and documented as cash flow hedges. The effectiveness of the cash flow hedge contracts is assessed quarterly using regression analysis as well as other timing and probability criteria. To receive cash flow hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge and the hedges are expected to be highly effective in offsetting changes to future cash flows on hedged transactions. The gross gains and losses on these hedges are included in “Accumulated other comprehensive income (loss)” and are reclassified into earnings at the time the forecasted revenue or expense is recognized. In the event the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, Autodesk reclassifies the gain or loss on the related cash flow hedge from “Accumulated other comprehensive income (loss)” to “Interest and other income (expense), net” in the Company’s Consolidated Financial Statements at that time.

The notional amount of these contracts was $345.5 million at January 31, 2011 and $239.1 million at January 31, 2010. Outstanding contracts are recognized as either assets or liabilities on the balance sheet at fair value. The entire net loss of $0.8 million remaining in “Accumulated Other Comprehensive Income (Loss)” as of January 31, 2011 is expected to be recognized into earnings within the next twelve months.

Balance Sheet Hedges

In addition to the cash flow hedges described above, Autodesk uses contracts which are not designated as hedging instruments to reduce the exchange rate risk associated primarily with foreign currency denominated receivables and payables. Forward contracts are marked-to-market at the end of each fiscal quarter with gains and losses recognized as “Interest and other income, net”. These derivative instruments do not subject the Company to material balance sheet risk due to exchange rate movements because gains and losses on these derivative instruments are intended to offset the gains or losses resulting from the settlement of the underlying foreign currency denominated receivables and payables. The notional amounts of foreign currency contracts were $56.1 million at January 31, 2011 and $19.6 million at January 31, 2010.

Fair Value of Derivative Instruments:

The fair value of derivative instruments in Autodesk’s Consolidated Balance Sheets were as follows as of January 31, 2011 and January 31, 2010:


	Balance Sheet Location	Fair Value at
	Balance Sheet Location	January 31, 2011		January 31, 2010
Derivative Assets
Foreign currency contracts designated as cash flow hedges	Prepaid expenses and other current assets	$	5.1	$	4.3
Derivatives not designated as hedging instruments			—		—

Total derivative assets			5.1		4.3


Derivative Liabilities
Foreign currency contracts designated as cash flow hedges	Other accrued liabilities	$	1.2	$	0.4
Derivatives not designated as hedging instruments			—		—

Total derivative liabilities		$	1.2	$	0.4

The effects of derivatives designated as hedging instruments on Autodesk’s Consolidated Statements of Operations were as follows for the fiscal years ended January 31, 2011 and 2010, respectively (amounts presented include any income tax effects):


	Foreign Currency Contracts
	Fiscal Year Ended January 31,
	2011		2010
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)	$	11.8	$	(2.5	)

Amount and Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
Net revenue	$	13.0	$	(10.9	)
Operating expenses		2.1		4.6

Total	$	15.1	$	(6.3	)

Amount and Location of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
Interest and other income (expense), net	$	0.1	$	1.3

(1)

Includes $1.0 million net gain recognized for the fiscal year ended January 31, 2010 due to previously forecasted transactions that did not occur within the originally specified time period or the additional period of time allowed.

The effects of derivatives not designated as hedging instruments on Autodesk’s Consolidated Statements of Operations were as follows for the fiscal years ended January 31, 2011 and 2010, respectively (amounts presented include any income tax effects):


	Foreign Exchange Contracts
	Fiscal Year Ended January 31,
	2011		2010
Amount and Location of Gain (Loss) Recognized in Income on Derivative
Interest and other income, net	$	2.3	$	0.9

- Definition

This item represents the entire disclosure related to Investments in Certain Debt and Equity Securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets). This element is a also used to disclose the entity's entire derivative instruments and hedging activities disclosure as a single block of text. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising there from, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References+ Details

Fair Value Measurements

12 Months Ended

Jan. 31, 2011

Fair Value Measurements

Note 3. Fair Value Measurements

On a recurring basis, Autodesk measures the fair value of certain financial assets and liabilities, which consist of cash equivalents, marketable securities and foreign currency contracts. Autodesk uses a three-tier value hierarchy, which prioritizes the inputs used in measuring fair value as follows: (Level 1) observable inputs such as quoted prices in active markets; (Level 2) inputs other than the quoted prices in active markets that are observable either directly or indirectly in active markets; and (Level 3) unobservable inputs for which there is little or no market data, which require Autodesk to develop its own assumptions. When determining fair value, Autodesk uses observable market data and relies on unobservable inputs only when observable market data is not available. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. There have been no transfers between fair value measurement levels during the year ended January 31, 2011.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table summarizes Autodesk’s investments and financial instruments measured at fair value on a recurring basis as of January 31, 2011:


	Fair Value Measurements at January 31, 2011 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Total
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Cash equivalents(1):
Certificates of deposit and time deposits	$	97.9	$	285.4	$	—	$	383.3
Commercial paper		—		331.0		—		331.0
Money market funds		—		43.8		—		43.8
Marketable securities:
Commercial paper and corporate securities		191.6		10.0		—		201.6
U.S. government agency securities		60.1		—		—		60.1
U.S. treasury securities		38.8		—		—		38.8
Certificates of deposit and time deposits		25.0		4.0		—		29.0
Mutual funds		31.3		—		—		31.3
Sovereign debt		—		13.1		—		13.1
Municipal securities		13.4		—		—		13.4
Taxable auction-rate securities		—		—		4.2		4.2
Other		0.3		—		—		0.3
Foreign currency derivative contracts(2)		—		5.1		—		5.1

Total	$	458.4	$	692.4	$	4.2	$	1,155.0

Liabilities
Foreign currency derivative contracts(3)		—		1.2		—		1.2

Total	$	—	$	1.2	$	—	$	1.2

(1)

Included in “Cash and cash equivalents” in the accompanying Consolidated Balance Sheets.

(2)

Included in “Prepaid expenses and other current assets” in the accompanying Consolidated Balance Sheets.

(3)

Included in “Other accrued liabilities” in the accompanying Consolidated Balance Sheets.

The following table summarizes Autodesk’s investments and financial instruments measured at fair value on a recurring basis as of January 31, 2010:


	Fair Value Measurements at January 31, 2010 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Total
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Cash equivalents(1):
Certificates of deposit and time deposits	$	64.0	$	208.8	$	—	$	272.8
Commercial paper		—		299.5		—		299.5
Money market funds		—		49.4		—		49.4
Municipal securities		0.8		—		—		0.8
Marketable securities:
Commercial paper and corporate securities		115.9		69.0		—		184.9
Certificates of deposit and time deposits		20.0		4.6		—		24.6
U.S. government agency securities		18.0		—		—		18.0
Mutual funds		26.3		—		—		26.3
Municipal securities		10.5		—		—		10.5
Money market funds		—		—		10.0		10.0
Taxable auction-rate securities		—		—		7.6		7.6
U.S. treasury securities and sovereign debt		5.2		—		—		5.2
Other		0.4		—		—		0.4
Foreign currency derivative contracts(2)		—		4.3		—		4.3

Total	$	261.1	$	635.6	$	17.6	$	914.3

Liabilities
Foreign currency derivative contracts(3)		—		0.4		—		0.4

Total	$	—	$	0.4	$	—	$	0.4

(1)

Included in “Cash and cash equivalents” in the accompanying Consolidated Balance Sheets.

(2)

Included in “Prepaid expenses and other current assets” in the accompanying Consolidated Balance Sheets.

(3)

Included in “Other accrued liabilities” in the accompanying Consolidated Balance Sheets.

Autodesk’s cash equivalents and marketable securities are primarily classified within Level 1 or Level 2 of the fair value hierarchy because they are valued primarily using quoted market prices, or alternative pricing sources and models utilizing market observable inputs with reasonable levels of price transparency. The Company’s investments held in the International Fund at January 31, 2010 and in auction rate securities at January 31, 2011 and 2010 are designated as Level 3. The Company conducted its fair value assessment of the International Fund using Level 1 and Level 3 inputs. At January 31, 2010, management reviewed the International Fund’s underlying portfolio, which was substantially comprised of cash deposited into the U.S. District Court’s Registry at the Federal Reserve Bank of New York. Normally, the Company would have classified such investments within Level 1 of the fair value hierarchy. Management evaluated the fair value of its unit interest in the International Fund, considering risk of collection, timing and other factors. These assumptions are inherently subjective and involve significant management judgment. As a result, the Company classified its holdings in the International Fund within Level 3 of the fair value hierarchy. Autodesk’s investments in auction rate securities are classified within Level 3 because they are valued using a discounted cash flow model, and some of the inputs to this model are unobservable in the market.

A reconciliation of the change in Autodesk’s Level 3 items for the fiscal years ended January 31, 2011 and 2010 was as follows:


	Fair Value Measurements Using Significant Unobservable Inputs
	(Level 3)
	Money Market Funds			Taxable Auction-Rate Securities			Total
Balance at January 31, 2009	$	33.3		$	7.6		$	40.9
Transfers into (out of) Level 3		—			—			—
Redemptions(1)		(23.3	)		—			(23.3	)
Total realized/unrealized gains (losses) included in earnings		—			—			—

Balance at January 31, 2010		10.0			7.6			17.6
Transfers into (out of) Level 3		—			—			—
Redemptions(1)		(11.7	)		(3.4	)		(15.1	)
Total realized/unrealized gains (losses) included in earnings		1.7			—			1.7

Balance at January 31, 2011	$	—		$	4.2		$	4.2

(1)

The redemptions of $10.0 million and $23.3 million for fiscal years ended January 31, 2011 and 2010, respectively, are from the International Fund.

- Definition

This element represents the disclosure related to the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods.

+ References+ Details

Employee and Director Stock Plans

12 Months Ended

Jan. 31, 2011

Employee and Director Stock Plans

Note 4. Employee and Director Stock Plans

Stock Plans

As of January 31, 2011, Autodesk maintained two active stock option plans for the purpose of granting equity awards to employees and to non-employee members of Autodesk’s Board of Directors: the 2008 Employee Stock Plan, as amended and restated (“2008 Plan”), which is available only to employees, and the 2010 Outside Directors’ Option Plan, as amended (“2010 Plan”), which is available only to non-employee directors. Additionally, there are seven expired or terminated plans with options outstanding. The exercise price of all stock options granted under these plans was equal to the fair market value of the stock on the grant date.

The 2008 Plan was originally approved by Autodesk’s stockholders in November 2007. On June 10, 2010, Autodesk’s stockholders approved amendments to the 2008 Plan, which increased the number of shares reserved for issuance under the plan by 15.5 million shares in addition to 0.5 million shares that remained available for issuance under the plan prior to the amendment, and extended the term of the plan to June 2013. The 2008 Plan permits the grant of stock options, restricted stock units and restricted stock awards; however, no more than 2.5 million of the shares reserved for issuance under the 2008 Plan may be issued pursuant to awards of restricted stock units. Options and restricted stock units granted under the 2008 Plan vest over periods ranging from immediately upon grant to over a four year period and options expire within four to ten years from the date of grant. At January 31, 2011, 15.1 million shares were available for future issuance under the 2008 Plan.

The 2010 Plan, which was approved by the stockholders in June 2009 and replaced the 2000 Directors’ Option Plan (“2000 Plan”), became effective March 16, 2010. The 2010 Plan permits the grant of stock options and restricted stock awards to non-employee members of Autodesk’s Board of Directors. Options and awards granted under the 2010 Plan vest over periods ranging from one year to over a four year period and options expire within seven years from the date of grant. The 2010 Plan reserved 2.5 million shares of Autodesk common stock, plus 0.5 million shares that remained available for issuance under the 2000 Plan. At January 31, 2011, 2.8 million shares were available for future issuance. The 2010 Plan will expire in March 2020.

The following sections summarize activity under Autodesk’s stock plans.

Stock Options:

A summary of stock option activity for the fiscal year ended January 31, 2011 is as follows:


	Number of Shares			Weighted average exercise price per share
	(in millions)
Options outstanding at January 31, 2010		29.1		$	27.56
Granted		6.7			29.71
Exercised		(3.9	)		18.92
Cancelled		(1.5	)		32.06

Options outstanding at January 31, 2011		30.4		$	28.93

Options exercisable at January 31, 2011		17.6		$	31.26

Options available for grant at January 31, 2011		17.9

As of January 31, 2011, total compensation cost of $59.2 million related to non-vested options is expected to be recognized over a weighted average period of 1.9 years. The following table summarizes information about the pre-tax intrinsic value of options exercised, and the weighted average grant date fair value per share of options granted, during the fiscal years ended January 31, 2011, 2010 and 2009. The intrinsic value of options exercised is calculated as the difference between the exercise price of the option and the market value of the stock on the date of exercise. The weighted average grant date fair value of stock options granted is calculated, as of the stock option grant date, using the Black-Scholes-Merton option pricing model.


	Fiscal year ended January 31,
	2011		2010		2009
Pre-tax intrinsic value of options exercised	$	61.9	$	18.8	$	46.7
Weighted average grant date fair value per share of stock options granted	$	9.30	$	6.13	$	9.82

The following table summarizes information about options outstanding and exercisable at January 31, 2011:


	Options Exercisable								Options Outstanding
	Number of Shares (in millions)		Weighted average contractual life (in years)		Weighted average exercise price		Aggregate intrinsic value(1) (in millions)		Number of Shares (in millions)		Weighted average contractual life (in years)		Weighted average exercise price		Aggregate intrinsic value(1) (in millions)
Range of per-share exercise prices:
$0.61 – $16.53		3.5			$	11.30				7.4			$	13.10
$17.37 – $29.49		2.8				23.89				8.3				27.10
$29.50 – $35.00		3.2				32.21				6.1				31.77
$35.30 – $45.29		7.4				41.53				7.9				41.60
$47.24 – $49.80		0.7				48.59				0.7				48.61

		17.6		2.4	$	31.26	$	187.9		30.4		3.7	$	28.93	$	380.9

(1)

Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $40.68 per share as of January 31, 2011, which would have been received by the option holders had all option holders exercised their options as of that date.

These options will expire if not exercised at specific dates ranging through December 2017.

Restricted Stock:

A summary of restricted stock award and restricted stock unit activity for the fiscal year ended January 31, 2011 is as follows:


	Unreleased Restricted Stock			Weighted average grant date fair value
	(in thousands)
Unreleased restricted stock at January 31, 2010		855		$	24.77
Awarded		628			37.48
Released		(30	)		22.46
Forfeited		(26	)		24.17

Unreleased restricted stock at January 31, 2011		1,427		$	30.43

During the fiscal year ended January 31, 2011, Autodesk granted approximately 605,000 restricted stock units under the 2008 Plan. The restricted stock units vest over periods ranging from immediately upon grant to the third anniversary of the date of grant. Restricted stock units are not considered outstanding stock at the time of grant, as the holders of these units are not entitled to any of the rights of a stockholder, including voting rights. The fair value of the restricted stock units are expensed ratably over the vesting period. Autodesk recorded stock-based compensation expense related to restricted stock units of $8.9 million and $1.9 million during fiscal years ended January 31, 2011 and 2010, respectively. As of January 31, 2011, total compensation cost not yet recognized of $22.5 million related to non-vested awards, is expected to be recognized over a weighted average period of 1.3 years. At January 31, 2011, the number of units granted but unreleased was 1,404,000.

During the fiscal year ended January 31, 2011, Autodesk granted approximately 23,000 restricted stock awards under the 2010 Plan. Restricted stock awards granted under the 2010 Plan vest on the first anniversary of the date of grant. Restricted stock awards are considered outstanding at the time of grant, as the stock award holders are entitled to many of the rights of a stockholder, including voting rights. The fair value of the restricted stock awards are expensed ratably over the vesting period. Autodesk recorded stock-based compensation expense related to restricted stock awards of $0.7 million during each of the fiscal years ended January 31, 2011 and 2010, respectively. As of January 31, 2011, total compensation cost not yet recognized of $0.2 million related to non-vested awards, is expected to be recognized over a weighted average period of 0.4 years. At January 31, 2011, the number of awards granted but unreleased was 23,000.

1998 Employee Qualified Stock Purchase Plan (“ESP Plan”)

Under Autodesk’s ESP Plan, which was approved by stockholders in 1998, eligible employees may purchase shares of Autodesk’s common stock at their discretion using up to 15% of their eligible compensation subject to certain limitations, at not less than 85% of fair market value as defined in the ESP Plan. At January 31, 2011, a total of 27.8 million shares were available for future issuance. This amount automatically increases on the first trading day of each fiscal year by an amount equal to the lesser of 10.0 million shares or 2.0% of the total of (1) outstanding shares plus (2) any shares repurchased by Autodesk during the prior fiscal year. Under the ESP Plan, the Company issues shares on the first trading day following March 31 and September 30 of each fiscal year. The ESP Plan expires during fiscal 2018.

Autodesk issued 3.2 million shares under the ESP Plan at an average price of $14.77 per share in fiscal 2011, 3.1 million shares at an average price of $14.41 per share in fiscal 2010, and 2.1 million shares at an average price of $27.32 per share in fiscal 2009. The weighted average grant date fair value of awards granted under the ESP Plan during fiscal 2011, 2010 and 2009, calculated as of the award grant date using the Black-Scholes-Merton option pricing model, was $7.22, $7.19 and $10.40 per share, respectively. Autodesk recorded $18.2 million, $26.6 million and $23.1 million of compensation expense associated with the ESP Plan in fiscal 2011, 2010 and 2009, respectively.

Equity Compensation Plan Information

The following table summarizes the number of outstanding options granted to employees and directors, as well as the number of securities remaining available for future issuance under these plans as of January 31, 2011 (number of securities in millions).


	(a)		(b)		(c)
Plan category	Number of securities to be issued upon exercise of outstanding options		Weighted-average exercise price of outstanding options		Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Equity compensation plans approved by security holders		31.1	$	28.06		45.7	(1)
Equity compensation plans not approved security holders(2)		0.7		10.39		—

Total		31.8	$	27.65		45.7

(1)

Included in this amount are 27.8 million securities available for future issuance under Autodesk’s ESP Plan.

(2)

Amounts correspond to Autodesk’s Nonstatutory Stock Option Plan, which was terminated by the Board of Directors in December 2004.

Income Taxes

12 Months Ended

Jan. 31, 2011

Income Taxes

Note 5. Income Taxes

The provision for income taxes consists of the following:


	Fiscal year ended January 31,
	2011			2010			2009
Federal:
Current	$	16.0		$	12.3		$	20.9
Deferred		(8.2	)		(33.0	)		0.7
State:
Current		(1.5	)		3.0			5.9
Deferred		7.4			7.1			(0.7	)
Foreign:
Current		48.4			34.1			54.2
Deferred		(2.1	)		3.2			(12.1	)

	$	60.0		$	26.7		$	68.9

Pursuant to accounting standards related to stock-based compensation, the Company has unrecorded excess stock option tax benefits of $160.6 million as of January 31, 2011. These amounts will be credited to additional paid-in-capital when such amounts reduce cash taxes payable. Foreign pretax income was $321.1 million in fiscal 2011, $253.9 million in fiscal 2010 and $298.5 million in fiscal 2009.

The differences between the U.S. statutory rate and the aggregate income tax provision are as follows:


	Fiscal year ended January 31,
	2011			2010			2009
Income tax provision at U.S. Federal statutory rate	$	95.2		$	29.7		$	88.3
State income tax expense (benefit), net of the U.S. Federal benefit		1.4			(0.6	)		(1.5	)
Foreign income taxed at rates different from the U.S. statutory rate		(39.7	)		(22.7	)		(55.6	)
U.S. valuation allowance		2.8			14.9			(0.2	)
Non-deductible stock-based compensation		7.9			11.7			11.8
Research and development tax credit benefit		(5.6	)		(4.7	)		(6.9	)
Tax benefit from closure of income tax audits and decreases in uncertain tax positions		(2.8	)		(2.5	)		(6.2	)
Officer compensation in excess of $1.0 million		0.5			0.3			0.2
Goodwill impairment		—			—			30.6
Non-deductible in-process research and development charge		—			—			7.0
Other		0.3			0.6			1.4

	$	60.0		$	26.7		$	68.9

Significant components of Autodesk’s deferred tax assets and liabilities are as follows:


	January 31,
	2011			2010
Nonqualified stock options	$	69.0		$	57.5
Research and development tax credit carryforwards		64.0			55.7
Foreign tax credit carryforwards		16.6			26.8
Accrued compensation and benefits		33.7			25.7
Other accruals not currently deductible for tax		18.7			17.8
Purchased technology and capitalized software		22.8			12.7
Fixed assets		15.1			12.0
Tax loss carryforwards		6.3			11.3
Capitalized research and development expenditures		2.5			3.4
Reserves for product returns and bad debts		2.1			2.1
Other		2.6			2.2

Total deferred tax assets		253.4			227.2
Less: valuation allowance		(42.9	)		(39.0	)

Net deferred tax assets		210.5			188.2

Tax method change on advanced payments		(9.4	)		—
Unremitted earnings of foreign subsidiaries		(53.6	)		(42.1	)

Total deferred tax liability		(63.0	)		(42.1	)

Net deferred tax assets	$	147.5		$	146.1

The valuation allowance increased by $3.9 million, $14.3 million and $8.5 million in fiscal 2011, 2010 and 2009, respectively. The fiscal 2011 and fiscal 2010 increase was primarily related to California deferred taxes. During the first quarter of fiscal 2010, the State of California enacted legislation significantly altering California tax law. As a result of the newly enacted legislation, Autodesk expects that in fiscal years 2012 and beyond, income subject to tax in California will be less than under prior tax law and accordingly, deferred tax assets are less likely to be realized. The fiscal 2009 increases were primarily related to Canadian deferred taxes, which Autodesk does not expect to realize.

No provision has been made for federal income taxes on unremitted earnings of certain of Autodesk’s foreign subsidiaries (cumulatively $1,030.5 million at January 31, 2011) because Autodesk plans to reinvest such earnings for the foreseeable future. At January 31, 2011, the net unrecognized deferred tax liability for these earnings was approximately $314.5 million.

Realization of the Company’s net deferred tax assets of $147.5 million is dependent upon the Company’s ability to generate future taxable income in appropriate tax jurisdictions to obtain benefit from the reversal of temporary differences, net operating loss carryforwards and tax credits. The amount of deferred tax assets considered realizable is subject to adjustment in future periods if estimates of future taxable income are reduced.

As of January 31, 2011, Autodesk had $16.9 million of cumulative federal tax loss carryforwards and $351.4 million of cumulative state tax loss carryforwards, which may be available to reduce future income tax liabilities in certain jurisdictions. These federal and state tax loss carryforwards will expire beginning fiscal 2012 through fiscal 2021 and fiscal 2012 through fiscal 2031, respectively.

As of January 31, 2011, Autodesk had $70.4 million of cumulative federal research tax credit carryforwards, $37.6 million of cumulative California state research tax credit carryforwards and $47.9 million of cumulative Canadian federal tax credit carryforwards, which may be available to reduce future income tax liabilities in the respective jurisdictions. The federal credit carryforwards will expire beginning fiscal 2012 through fiscal 2031, the state credit carryforwards may reduce future California income tax liabilities indefinitely, and the Canadian tax credit carryforwards will expire beginning fiscal 2023 through fiscal 2031. Autodesk also has $119.1 million of cumulative foreign tax credit carryforwards, which may be available to reduce future U. S. tax liabilities. The foreign tax credit will expire beginning fiscal 2018 through fiscal 2021.

Utilization of net operating losses and tax credits may be subject to an annual limitation due to ownership change limitations provided in the Internal Revenue Code and similar state provisions. This annual limitation may result in the expiration of net operating losses and credits before utilization.

As a result of certain business and employment actions and capital investments undertaken by Autodesk, income earned in certain countries is subject to reduced tax rates through fiscal 2019. The income tax benefits attributable to the tax status of these business arrangements are estimated to be zero in fiscal 2011, zero in fiscal 2010 and $0.3 million ($0.001 basic net income per share) in fiscal 2009. The income tax benefits were offset partially by accruals of U.S. income taxes on undistributed earnings, among other factors.

During fiscal 2011, Autodesk recognized income tax expense of approximately $2.1 million primarily related to a change in the expected future tax rates and the increase of a valuation allowance against California deferred taxes of $4.9 million partially offset by the closure of audits and other decreases in uncertain tax positions of $2.8 million.

During fiscal 2010, Autodesk recognized income tax expense of approximately $17.7 million primarily related to a change in the expected future tax rates and the establishment of a valuation allowance against California deferred taxes of $20.2 million partially offset by the closure of audits and other decreases in uncertain tax positions with respect to fiscal 2003 of $2.5 million.

During fiscal 2009, Autodesk recognized income tax benefits of approximately $6.2 million primarily related to closure of audits and other decreases in uncertain tax positions with respect to fiscal 2002 through fiscal 2008.

As of January 31, 2011, the Company had $188.4 million of gross unrecognized tax benefits, of which $175.0 million would impact the effective tax rate, if recognized. It is possible that the amount of unrecognized tax benefits will change in the next twelve months; however an estimate of the range of the possible change cannot be made at this time.

A reconciliation of the beginning and ending amount of the gross unrecognized tax benefits is as follows:


	2011			2010			2009
Gross unrecognized tax benefits at the beginning of the fiscal year	$	178.2		$	169.4		$	152.4
Increases for tax positions of prior years		2.0			3.1			1.2
Decreases for tax positions of prior years		(3.5	)		(1.9	)		(7.0	)
Increases for tax positions related to the current year		13.9			11.1			25.8
Decreases for lapse of statute of limitations/audit settlements		(2.2	)		(3.5	)		(3.0	)

Gross unrecognized tax benefits at the end of the fiscal year	$	188.4		$	178.2		$	169.4

It is the Company’s continuing practice to recognize interest and/or penalties related to income tax matters in income tax expense. The Company had $1.9 million, $2.2 million and $2.4 million, net of tax benefit, accrued for interest and zero accrued for penalties related to unrecognized tax benefits as of January 31, 2011, 2010 and 2009, respectively.

Autodesk and its subsidiaries are subject to income tax in the United States as well as numerous state and foreign jurisdictions. The Company’s U.S. and state income tax returns for fiscal year 2003 through fiscal year 2011 remain open to examination. In addition, the Company files tax returns in multiple foreign taxing jurisdictions with open tax years ranging from fiscal year 2002 to 2011.

Deferred Compensation

12 Months Ended

Jan. 31, 2011

Deferred Compensation

Note 6. Deferred Compensation

At January 31, 2011, Autodesk had marketable securities totaling $391.8 million, of which $31.3 million related to investments in debt and equity securities that are held in a rabbi trust under non-qualified deferred compensation plans. The total related deferred compensation liability was $31.3 million at January 31, 2011, of which $3.4 million was classified as current and $27.9 million was classified as non-current liabilities. The value of debt and equity securities held in the rabbi trust at January 31, 2010 was $26.3 million. The total related deferred compensation liability at January 31, 2010 was $26.3 million, of which $1.1 million was classified as current and $25.2 million was classified as non-current liabilities. The current and non-current portions of the liability are recorded in the Consolidated Balance Sheets under “Accrued compensation” and “Other liabilities,” respectively.

Borrowing Arrangements

12 Months Ended

Jan. 31, 2011

Borrowing Arrangements

Note 7. Borrowing Arrangements

Autodesk’s U.S. line of credit facility permits unsecured short-term borrowings of up to $250.0 million and is available for working capital or other business needs. The credit agreement contains customary covenants, which could restrict liens on Autodesk’s assets, and restrict the Company’s ability to incur additional indebtedness or make dispositions of assets if Autodesk fails to maintain its financial covenants. At January 31, 2011 and 2010, Autodesk had no outstanding borrowings on this line of credit. This facility expires in August 2012.

During the second quarter of fiscal 2011, Autodesk terminated its $5.0 million China line of credit because it was no longer needed. At January 31, 2010, Autodesk had no outstanding borrowings on this line of credit.

Commitments and Contingencies

12 Months Ended

Jan. 31, 2011

Commitments and Contingencies

Note 8. Commitments and Contingencies

Lease commitments

Autodesk leases office space and computer equipment under non-cancellable operating lease agreements that expire at various dates through 2023. The leases generally provide that Autodesk pay taxes, insurance and maintenance expenses related to the leased assets. Certain of these lease arrangements contain escalation clauses whereby monthly rent increases over time. At January 31, 2011, the aggregate future minimum lease payments required were as follows:


2012	$	52.7
2013		44.0
2014		34.6
2015		26.4
2016		21.1
Thereafter		54.1

		232.9
Less: Sublease income		4.2

	$	228.7

Rent expense related to these operating leases recognized on a straight-line basis over the lease period, was as follows:


	Fiscal Year Ended January 31,
	2011		2010		2009
Rent expense	$	52.1	$	56.8	$	73.1

Purchase commitments

In the normal course of business, Autodesk enters into various purchase commitments for goods or services. Total non-cancellable purchase commitments as of January 31, 2011 were approximately $73.3 million for periods through fiscal 2015. These purchase commitments primarily result from contracts for the acquisition of IT infrastructure, marketing and software development services. Of the total purchase commitments, $9.8 million related to a termination fee for an outsource application hosting services agreement entered into during fiscal 2006. This fee is reduced as time lapses during the five-year contract period.

Autodesk has certain royalty commitments associated with the shipment and licensing of certain products. Royalty expense is generally based on a dollar amount per unit shipped or a percentage of the underlying revenue. Royalty expense, which was recorded under cost of license and other revenue on Autodesk’s Consolidated Statements of Operations, was $12.8 million in fiscal 2011, $16.5 million in fiscal 2010 and $17.1 million in fiscal 2009.

Indemnifications

In the normal course of business, Autodesk provides indemnifications of varying scopes, including limited product warranties and indemnification of customers against claims of intellectual property infringement made by third parties arising from the use of its products or services. Autodesk accrues for known indemnification issues if a loss is probable and can be reasonably estimated. Historically, costs related to these indemnifications have not been significant, and because potential future costs are highly variable, Autodesk is unable to estimate the maximum potential impact of these indemnifications on its future results of operations.

In connection with the purchase, sale or license of assets or businesses with third parties, Autodesk has entered into or assumed customary indemnification agreements related to the assets or businesses purchased, sold or licensed. Historically, costs related to these indemnifications have not been significant, and because potential future costs are highly variable, Autodesk is unable to estimate the maximum potential impact of these indemnifications on its future results of operations.

As permitted under Delaware law, Autodesk has agreements whereby it indemnifies its officers and directors for certain events or occurrences while the officer or director is, or was, serving at Autodesk’s request in such capacity. The maximum potential amount of future payments Autodesk could be required to make under these indemnification agreements is unlimited; however, Autodesk has directors’ and officers’ liability insurance coverage that is intended to reduce its financial exposure and may enable Autodesk to recover a portion of any future amounts paid. Autodesk believes the estimated fair value of these indemnification agreements in excess of applicable insurance coverage is minimal.

Legal Proceedings

Autodesk is involved in a variety of claims, suits, investigations and proceedings in the normal course of business activities including claims of alleged infringement of intellectual property rights, commercial, employment, piracy prosecution, business practices and other matters. In the Company’s opinion, resolution of pending matters is not expected to have a material adverse impact on its consolidated results of operations, cash flows or its financial position. However, it is possible that an unfavorable resolution of one or more such proceedings could in the future materially affect its future results of operations, cash flows or financial position in a particular period.

Stockholders' Equity

12 Months Ended

Jan. 31, 2011

Stockholders' Equity

Note 9. Stockholders’ Equity

Preferred Stock

Under Autodesk’s Certificate of Incorporation, 2.0 million shares of preferred stock are authorized. At January 31, 2011, there were no preferred shares issued or outstanding. The Board of Directors has the authority to issue the preferred stock in one or more series and to fix rights, preferences, privileges and restrictions, including dividends and the number of shares constituting any series or the designation of such series, without any further vote or action by the stockholders.

Common Stock Repurchase Programs

Autodesk has a stock repurchase program that helps offset the dilution to net income per share caused by the issuance of stock under the Company’s employee stock plans and returns excess cash generated from its business to stockholders and for such other purposes as may be in the best interests of Autodesk and its stockholders. During fiscal 2011, Autodesk repurchased and retired 9.0 million shares at an average repurchase price of $31.13 per share, 2.7 million shares in fiscal 2010 at an average repurchase price of $23.63 per share and 8.0 million shares in fiscal 2009 at an average repurchase price of $32.06. Common stock and additional paid-in capital and retained earnings were reduced by $138.3 million and $142.0 million, respectively for the year ended January 31, 2011 and $36.4 million and $26.8 million, respectively, for the year ended January 31, 2010, as a result of the stock repurchases.

At January 31, 2011, 24.5 million shares remained available for repurchase under repurchase plans approved by the Board of Directors. In fiscal 2011, 2010 and 2009, Autodesk repurchased its common stock through open market purchases. The number of shares acquired and the timing of the purchases are based on several factors, including general market conditions, the number of employee stock option exercises, the trading price of Autodesk common stock, cash on hand and available in the United States, and company defined trading windows.

- Definition

Disclosures related to accounts comprising shareholders' equity, including other comprehensive income. Includes: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables; effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References+ Details

Interest and Other Income, net

12 Months Ended

Jan. 31, 2011

Interest and Other Income, net

Note 10. Interest and Other Income, net

Interest and other income, net, consists of the following:


	Fiscal Year Ended January 31,
	2011			2010		2009
Interest and investment income, net	$	10.9		$	10.0	$	13.6
Investment impairment		—			—		(5.9	)
Gain (loss) on foreign currency		(14.0	)		5.0		(1.0	)
Other Income		3.7			4.1		1.3

Interest and other income, net	$	0.6		$	19.1	$	8.0

Accumulated Other Comprehensive Income (loss)

12 Months Ended

Jan. 31, 2011

Accumulated Other Comprehensive Income (loss)

Note 11. Accumulated Other Comprehensive Income (loss)

Accumulated other comprehensive income (loss), net of taxes, was comprised of the following at January 31:


	January 31,
	2011			2010			2009
Net gain (loss) on derivative instruments	$	(0.8	)	$	2.3		$	(0.2	)
Net unrealized gain on available-for-sale securities		2.4			1.5			—
Unfunded portion of pension plans		(9.8	)		(5.9	)		—
Foreign currency translation adjustments		7.6			(1.4	)		(11.0	)

Accumulated other comprehensive income (loss)	$	(0.6	)	$	(3.5	)	$	(11.2	)

- Definition

This label may include the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains and losses on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains and losses on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain or loss and net prior service cost or credit for pension plans and other postretirement benefit plans.

+ References+ Details

Net Income Per Share

12 Months Ended

Jan. 31, 2011

Net Income Per Share

Note 12. Net Income Per Share

Basic net income per share is computed using the weighted average number of shares of common stock outstanding for the period, including restricted stock awards and excluding stock options and restricted stock units. Diluted net income per share is based upon the weighted average shares of common stock outstanding for the period and potentially dilutive common shares, including the effect of stock options and restricted stock units under the treasury stock method. The following table sets forth the computation of the numerators and denominators used in the basic and diluted net income per share amounts:


	Fiscal Year Ended January 31,
	2011		2010		2009
Numerator:
Net income	$	212.0	$	58.0	$	183.6

Denominator:
Denominator for basic net income per share—weighted average shares		227.6		228.7		225.5
Effect of dilutive securities		6.6		3.4		4.6

Denominator for dilutive net income per share		234.2		232.1		230.1

Basic net income per share	$	0.93	$	0.25	$	0.81

Diluted net income per share	$	0.90	$	0.25	$	0.80

The computation of diluted net income per share does not include shares that are anti-dilutive under the treasury stock method because their exercise prices are higher than the average market value of Autodesk’s stock during the fiscal year. For the fiscal years ended January 31, 2011, 2010 and 2009, 19.3 million, 21.3 million and 15.8 million potentially anti-dilutive shares, respectively, were excluded from the computation of net income per share.

Segments

12 Months Ended

Jan. 31, 2011

Segments

Note 13. Segments

Autodesk reports segment information based on the “management” approach. The management approach designates the internal reporting used by management for making decisions and assessing performance as the source of the Company’s reportable segments. Autodesk has four reportable segments: Platform Solutions and Emerging Business (“PSEB”), Architecture, Engineering and Construction (“AEC”), Manufacturing (“MFG”) and Media and Entertainment (“M&E”). Location Services, which Autodesk disposed of in February 2009, is not included in any of the above reportable segments, and is reflected as Other. Autodesk has no material inter-segment revenue.

The PSEB, AEC and MFG segments derive revenue from the sale of licenses for software products and services to customers who design, build, manage or own building, manufacturing and infrastructure projects. Our M&E segment derives revenue from the sale of products to creative professionals, post-production facilities and broadcasters for a variety of applications, including feature films, television programs, commercials, music and corporate videos, interactive game production, web design and interactive web streaming.

PSEB includes Autodesk’s horizontal design product, AutoCAD. Autodesk’s AutoCAD product is a platform product that underpins the Company’s vertical design product offerings for the industries it serves. For example, AEC and MFG offer tailored versions of AutoCAD software for the industries they serve. Autodesk’s AutoCAD product also provides a platform for Autodesk’s developer partners to build custom solutions for a range of diverse design-oriented markets. PSEB’s revenue primarily includes revenue from sales of licenses of Autodesk’s horizontal design products, AutoCAD and AutoCAD LT, as well as many of Autodesk’s vertical design products.

AEC software products help to improve the way building, civil infrastructure, process plant and construction projects are designed, built and managed. A broad portfolio of solutions enables greater efficiency, accuracy and sustainability across the entire project lifecycle. Autodesk AEC solutions include advanced technology for building information modeling (“BIM”), AutoCAD-based design and documentation productivity software, sustainable design analysis applications, and collaborative project management solutions. BIM, an integrated process for building and infrastructure design, analysis, documentation and construction, uses consistent, coordination information to improve communication and collaboration between the extended project team. AEC provides a comprehensive portfolio of BIM solutions that help customers deliver projects faster and more economically, while minimizing environmental impact. AEC’s revenue primarily includes revenue from the sales of licenses of Autodesk Revit, AutoCAD Civil 3D, AutoCAD Architecture and AutoCAD Map 3D products.

MFG provides the manufacturers in automotive and transportation, industrial machinery, consumer products and building products with comprehensive digital prototyping solutions that brings together design data from all phases of the product development process to develop a single digital model created in Autodesk Inventor software. Autodesk’s solutions for digital prototyping enable a broad group of manufacturers to realize benefits with minimal disruption to existing workflows. MFG’s revenue primarily includes revenue from the sales of licenses of Autodesk Inventor, AutoCAD Mechanical and Autodesk Moldflow products.

M&E is comprised of two product groups: Animation, including design visualization, and Creative Finishing. Animation products, such as Autodesk 3ds Max and Autodesk Maya, provide tools for digital sculpting, modeling, animation, effects, rendering and compositing, for design visualization, visual effects and games production. Creative Finishing products provide editing, finishing and visual effects design and color grading.

All of Autodesk’s reportable segments distribute their respective products primarily through authorized resellers and distributors and, to a lesser extent, through direct sales to end-users.

The accounting policies of the reportable segments are the same as those described in Note 1, “Business and Summary of Significant Accounting Policies.” Autodesk evaluates each segment’s performance on the basis of gross profit. Autodesk currently does not separately accumulate and report asset information by segment, except for goodwill, which is disclosed in Note 1, “Business and Summary of Significant Accounting Policies.”

Information concerning the operations of Autodesk’s reportable segments is as follows:


	Fiscal year ended January 31,
	2011			2010			2009
Net revenue:
Platform Solutions and Emerging Business	$	716.2		$	624.0		$	900.8
Architecture, Engineering and Construction		568.0			513.3			641.4
Manufacturing		470.0			386.9			488.4
Media and Entertainment		197.6			189.1			262.1
Other(1)		—			0.4			22.5

	$	1,951.8		$	1,713.7		$	2,315.2

Gross profit:
Platform Solutions and Emerging Business	$	678.9		$	589.7		$	860.7
Architecture, Engineering and Construction		517.6			465.2			592.7
Manufacturing		439.5			358.4			456.9
Media and Entertainment		153.9			144.4			197.6
Unallocated(2)		(34.7	)		(35.8	)		(11.8	)

	$	1,755.2		$	1,521.9		$	2,096.1

Depreciation and amortization:
Platform Solutions and Emerging Business	$	3.0		$	3.1		$	2.4
Architecture, Engineering and Construction		1.6			1.8			2.1
Manufacturing		2.3			2.5			2.6
Media and Entertainment		1.1			1.8			2.5
Unallocated		97.4			102.3			82.8

	$	105.4		$	111.5		$	92.4

(1)

Other primarily consisted of revenue from Autodesk’s Location Services division, which Autodesk disposed of in February 2009.

(2)

Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including stock-based compensation expense.

Information regarding Autodesk’s operations by geographic area is as follows:


	Fiscal year ended January 31,
	2011		2010		2009
Net revenue:
Americas
U.S.	$	561.6	$	527.5	$	646.4
Other Americas		139.9		126.9		135.9

Total Americas		701.5		654.4		782.3

Europe, Middle East and Africa		782.8		671.1		1,003.4

Asia Pacific
Japan		200.6		171.1		213.2
Other Asia Pacific		266.9		217.1		316.3

Total Asia Pacific		467.5		388.2		529.5

Total net revenue	$	1,951.8	$	1,713.7	$	2,315.2


	January 31,
	2011		2010
Long-lived assets(1):
Americas
U.S.	$	571.2	$	611.3
Other Americas		65.6		78.9

Total Americas		636.8		690.2

Europe, Middle East and Africa
Switzerland		42.8		49.3
Other Europe, Middle East and Africa		68.5		56.9

Total Europe, Middle East and Africa		111.3		106.2

Asia Pacific		41.9		43.7

Total long-lived assets	$	790.0	$	840.1

(1)

Long-lived assets exclude investments in subsidiaries, deferred tax assets and marketable securities.

Business Combinations

12 Months Ended

Jan. 31, 2011

Business Combinations

Note 14. Business Combinations

The results of operations of the following acquisitions are included in the accompanying Consolidated Statements of Operations since the acquisition dates, and the related assets and liabilities were recorded based upon their relative fair values at their respective acquisition dates. Pro forma financial information has not been presented as their historical operations were not material to Autodesk’s Consolidated Financial Statements either individually or in the aggregate. During the fiscal year ended January 31, 2011, the Company acquired two entities, neither of which were individually material, for total consideration $13.5 million.

Fiscal 2010 Acquisitions

PlanPlatform

In November 2009, Autodesk acquired all of the outstanding shares of PlanPlatform Ltd. (“PlanPlatform”), based in Tel Aviv, Israel. PlanPlatform was engaged in the business of designing and developing a web collaboration tool for AutoCAD. The acquisition of PlanPlatform further expanded Autodesk’s expertise in emerging technologies and remote application delivery and provided a design team with knowledge of web-based design applications. Autodesk incorporated PlanPlatform into its PSEB segment.

Management’s allocation of the purchase price consideration, based on a valuation of the acquired assets and liabilities, was as follows:


PlanPlatform:
In-process research and development	$	1.3
Goodwill		14.1
Net tangible assets		2.6

	$	18.0

In-process research and development represents incomplete research and development projects that had not reached the stage of fully developed technology and is an indefinite lived asset that is held and tested at least annually for impairment until such time that it becomes fully developed technology. During fiscal 2011, the total in-process research and development related to PlanPlatform of $1.3 million reached the stage of fully developed technology and began being amortized to expense.

The $14.1 million of goodwill, which represents the excess of the purchase price over the fair value of the acquired net tangible and intangible assets, is deductible for tax purposes.

Retirement Benefit Plans

12 Months Ended

Jan. 31, 2011

Retirement Benefit Plans

Note 15. Retirement Benefit Plans

Pretax Savings Plan

Autodesk has a 401(k) plan that covers nearly all U.S. employees. Eligible employees may contribute up to 50% of their pretax salary, subject to limitations mandated by the Internal Revenue Service. Autodesk makes voluntary cash contributions and matches a portion of employee contributions in cash. Autodesk’s contributions were $6.7 million in fiscal 2011, $7.1 million in fiscal 2010 and $7.8 million in fiscal 2009. Autodesk does not allow participants to invest in Autodesk common stock through the 401(k) plan.

Other Plans

Autodesk provides certain defined benefit pension plans to employees primarily located in countries outside of the U.S. The Company deposits funds for specific plans, consistent with the requirements of local law, with insurance companies or third-party trustees, and accrues for the unfunded portion of the obligation, where material. The assumptions used in calculating the obligation for these plans depend on the local economic environment. The net liability related to the funded status of the plans was approximately $18.2 million and $12.5 million as of January 31, 2011 and 2010, respectively. The projected benefit obligation was $47.3 million and $36.2 million as of January 31, 2011 and 2010, respectively. The related fair value of plan assets was $29.1 million and $23.7 million as of January 31, 2011 and 2010, respectively. Our practice is to fund the pension plans in amounts at least sufficient to meet the minimum requirements of local laws and regulations. The assets of the plans are primarily invested in high quality fixed income investments. Our contributions were approximately $3.5 million, $3.4 million and $3.2 million in fiscal 2011, 2010 and 2009, respectively. As of January 31, 2011, our estimated future benefit payments are an aggregate $10.6 million for fiscal 2012 through fiscal 2016 and an aggregate of $9.8 million for fiscal 2017 through fiscal 2021. Autodesk recorded $9.8 million and $5.9 million of unrealized changes in the unfunded portion of Autodesk’s defined benefit plans in fiscal 2011 and fiscal 2010, respectively. The unrealized changes in the unfunded portion of Autodesk’s defined benefit plans were not recorded in years prior to fiscal 2010 because the amounts were immaterial.

Autodesk also provides defined contribution plans in certain foreign countries where required by statute. Autodesk’s funding policy for foreign defined contribution plans is consistent with the local requirements in each country. Autodesk’s contributions to these plans were $13.6 million in fiscal 2011, $13.4 million in fiscal 2010 and $12.0 million in fiscal 2009.

In addition, Autodesk offers a non-qualified deferred compensation plan to certain key employees whereby they may defer a portion (or all) of their annual compensation until retirement or a different date specified by the employee in accordance with terms of the plan. See Note 6, “Deferred Compensation,” for further discussion.

- Definition

Description containing the entire pension and other postretirement benefits disclosure as a single block of text.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 158

-Paragraph 7, 21, 22

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5, 6, 7, 8

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 8

-Subparagraph m

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 106

-Paragraph 518

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 264

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph a

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph h

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph q

Reference 10: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS106-2

-Paragraph 20, 21, 22

Reference 11: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 03-2

-Paragraph 8

Reference 12: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 30

-Paragraph 26

Reference 13: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Implementation Guide (Q and A)

-Number FAS88

-Paragraph 63

+ Details

Restructuring Reserves

12 Months Ended

Jan. 31, 2011

Restructuring Reserves

Note 16. Restructuring Reserves

During the first quarter of fiscal 2011, Autodesk initiated a restructuring plan in order to further reduce operating costs. The restructuring plan resulted in targeted staff reductions of approximately 200 positions. No leased facilities were consolidated as part of this restructuring (“Fiscal 2011 Plan”).

During the second quarter of fiscal 2010, Autodesk initiated a restructuring program in order to reduce its operating costs. This plan resulted in a staff reduction of approximately 430 positions globally and resulted in the consolidation of approximately 32 leased facilities around the world (“Fiscal 2010 Plan”).

In the fourth quarter of fiscal 2009, Autodesk initiated a restructuring program in order to reduce its operating costs. This program resulted in a staff reduction of approximately 700 positions globally and resulted in the consolidation of approximately 27 leased facilities (“Fiscal 2009 Plan”).

In connection with these restructuring plans, Autodesk recorded restructuring and impairment charges of $10.8 million and $48.2 million during the fiscal years ended January 31, 2011 and 2010, respectively. Of these amounts, $10.8 million and $24.3 million were recorded for one-time termination benefits and other costs during fiscal 2011 and 2010, respectively, and $23.9 million was recorded for facilities-related costs during fiscal 2010. The one-time termination benefits have substantially been paid as of January 31, 2011. Autodesk expects to pay the facility related liabilities through fiscal 2018.

The following table sets forth the restructuring activities for the fiscal years ended January 31, 2011 and 2010.


	Balance at January 31, 2010		Additions		Payments			Adjustments(1)			Balance at January 31, 2011
*Fiscal 2011 Plan*
Employee termination costs	$	—	$	12.4	$	(10.6	)	$	(0.3	)	$	1.5

*Fiscal 2010 Plan*
Employee termination costs		0.8		—		(0.8	)		—			—
Lease termination and asset costs		6.1		0.3		(4.3	)		(0.4	)		1.7

*Fiscal 2009 Plan*
Employee termination costs		1.0		—		(0.2	)		(0.8	)		—
Lease termination and asset costs		8.2		1.0		(4.6	)		(1.8	)		2.8

*Other*
Employee termination costs		0.4		—		(0.3	)		(0.1	)		—
Lease termination costs		2.9		—		(0.2	)		(0.1	)		2.6

Total	$	19.4	$	13.7	$	(21.0	)	$	(3.5	)	$	8.6

Current portion(2)	$	11.4									$	4.8
Non-current portion(2)		8.0										3.8

Total	$	19.4									$	8.6


	Balance at January 31, 2009		Additions		Payments			Adjustments(1)			Balance at January 31, 2010
*Fiscal 2010 Plan*
Employee termination costs	$	—	$	20.0	$	(18.2	)	$	(1.0	)	$	0.8
Lease termination and asset costs		—		9.9		(3.4	)		(0.4	)		6.1

*Fiscal 2009 Plan*
Employee termination costs		35.4		5.8		(37.8	)		(2.4	)		1.0
Lease termination and asset costs		2.8		12.2		(6.7	)		(0.1	)		8.2

*Other*
Employee termination costs		0.9		0.3		(0.4	)		(0.4	)		0.4
Lease termination costs		4.8		0.7		(1.8	)		(0.8	)		2.9

Total	$	43.9	$	48.9	$	(68.3	)	$	(5.1	)	$	19.4

Current portion(2)	$	38.4									$	11.4
Non-current portion(2)		5.5										8.0

Total	$	43.9									$	19.4

(1)

Adjustments include the impact of foreign currency translation.

(2)

The current and non-current portions of the reserve are recorded in the Consolidated Balance Sheets under “Other accrued liabilities” and “Other liabilities,” respectively.

Selected Quarterly Financial Information (Unaudited)

12 Months Ended

Jan. 31, 2011

Selected Quarterly Financial Information (Unaudited)

Note 17. Selected Quarterly Financial Information (Unaudited)

Summarized quarterly financial information for fiscal 2011 and 2010 is as follows:


2011	1st quarter			2nd quarter			3rd quarter			4th quarter			Fiscal year
Net revenue	$	474.6		$	472.8		$	476.7		$	527.7		$	1,951.8
Gross profit		423.3			424.4			428.2			479.3			1,755.2
Income from operations		50.8			79.8			69.2			71.6			271.4
Provision for income taxes		(10.5	)		(20.0	)		(18.1	)		(11.4	)		(60.0	)
Net income		36.9			59.9			53.6			61.6			212.0
Basic net income per share	$	0.16		$	0.26		$	0.24		$	0.27		$	0.93
Diluted net income per share	$	0.16		$	0.25		$	0.23		$	0.26		$	0.90

Income from operations includes the following items:
Stock-based compensation expense	$	24.3		$	21.0		$	17.0		$	18.4		$	80.7
Amortization of acquisition related intangibles		13.9			13.6			14.1			14.3			55.9
Restructuring charges		7.1			1.9			—			1.8			10.8

2010	1st quarter			2nd quarter			3rd quarter			4th quarter			Fiscal year
Net revenue	$	425.8		$	414.9		$	416.9		$	456.1		$	1,713.7
Gross profit		373.5			364.8			371.9			411.7			1,521.9
Income (loss) from operations		(19.4	)		2.7			26.3			56.0			65.6
Provision for income taxes		(12.7	)		(2.9	)		(2.5	)		(8.6	)		(26.7	)
Net income (loss)		(32.1	)		10.5			29.5			50.1			58.0
Basic net income (loss) per share	$	(0.14	)	$	0.05		$	0.13		$	0.22		$	0.25
Diluted net income (loss) per share	$	(0.14	)	$	0.05		$	0.13		$	0.21		$	0.25

Income from operations includes the following items:
Stock-based compensation expense	$	23.0		$	21.4		$	30.3		$	18.9		$	93.6
Amortization of acquisition related intangibles		14.7			15.0			15.1			13.6			58.4
Restructuring charges		16.5			26.4			4.9			0.4			48.2
Impairment of goodwill		21.0			—			—			—			21.0

Provision for income taxes includes the following item:
Establishment of valuation allowance on deferred tax assets	$	(21.0	)	$	—		$	—		$	—		$	(21.0	)

- Definition

This element can be used to disclose the entire quarterly financial data disclosure in the annual financial statements as a single block of text. The disclosure includes a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. Alternatively, the details of this disclosure can be reported using the elements in this group, or by using other taxonomy elements and applying the appropriate quarterly date and period contexts when creating an instance document. For example, the element for "Interest and Dividend Income, Operating" may be used by financial institutions from the Statement of Income, applying the appropriate quarterly date and period context when creating an instance document.

+ References+ Details

Subsequent Events

12 Months Ended

Jan. 31, 2011

Subsequent Events

Note 18. Subsequent Events

On March 1, 2011, Autodesk acquired Scaleform Corporation (“Scaleform”) for approximately $36.0 million. Scaleform was a privately held middleware and user interface tools company, whose technology has been licensed in the development of games across all major hardware platforms. The acquisition was structured as a merger, the result of which Autodesk acquired all the outstanding shares of Scaleform’s common stock. Scaleform will be integrated into Autodesk’s M&E segment.

On March 10, 2011, Autodesk acquired Blue Ridge Numerics, Inc (“Blue Ridge”) for approximately $39.0 million, subject to a working capital adjustment. Blue Ridge was a privately held company that designs and sells software that enables mechanical engineers to study fluid flow and thermal performance in virtual prototyping. The acquisition was structured as a merger, the result of which Autodesk acquired all the outstanding shares of Blue Ridge’s common and preferred stock. Blue Ridge will be integrated into Autodesk’s MFG segment.

FINANCIAL STATEMENT SCHEDULE II

12 Months Ended

Jan. 31, 2011

FINANCIAL STATEMENT SCHEDULE II

ITEM 15(A)(2)

FINANCIAL STATEMENT SCHEDULE II


Description	Balance at Beginning of Year		Additions Charged to Costs and Expenses or Revenues			Deductions and Write-Offs		Balance at End of Year
	(in millions)
Fiscal year ended January 31, 2011
Allowance for doubtful accounts	$	4.6	$	(0.3	)	$	0.1	$	4.2
Product returns reserves		11.8		38.9			40.1		10.6
Restructuring		19.4		13.7			24.5		8.6

Fiscal year ended January 31, 2010
Allowance for doubtful accounts	$	8.6	$	1.7		$	5.7	$	4.6
Product returns reserves		12.5		42.9			43.6		11.8
Restructuring		43.9		48.9			73.4		19.4

Fiscal year ended January 31, 2009
Allowance for doubtful accounts	$	7.8	$	5.1		$	4.3	$	8.6
Product returns reserves		14.3		53.1			54.9		12.5
Restructuring		5.6		43.0			4.7		43.9

Business and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Jan. 31, 2011

Business

Business

Principles of Consolidation

Principles of Consolidation

Reclassifications

Reclassifications


	2010			2009
Increase (Decrease) to Expense
Cost of license and other revenue	$	(7.9	)	$	(6.5	)
Cost of maintenance revenue		7.9			6.5

Use of Estimates

Use of Estimates

Foreign Currency Translation

Foreign Currency Translation

Derivative Financial Instruments

Derivative Financial Instruments

Cash and Cash Equivalents

Cash and Cash Equivalents

Marketable Securities

Marketable Securities

Accounts Receivable, Net

Accounts Receivable, Net

Accounts receivable, net, consisted of the following as of January 31:


	2011			2010
Trade accounts receivable	$	363.0		$	316.5
Less: Allowance for doubtful accounts		(4.2	)		(4.6	)
Product returns reserve		(10.6	)		(11.8	)
Partner programs and other obligations		(29.8	)		(22.7	)

Accounts receivable, net	$	318.4		$	277.4

Concentration of Credit Risk

Concentration of Credit Risk

Geographical concentrations of consolidated cash, cash equivalents and marketable securities held by Autodesk as of January 31:


	2011			2010
United States		14	%		12	%
Other Americas		1	%		2	%
Europe, Middle East and Africa (“EMEA”)		49	%		48	%
Asia Pacific (“APAC”)		36	%		38	%

Computer Equipment, Software, Furniture and Leasehold Improvements, Net

Computer Equipment, Software, Furniture and Leasehold Improvements, Net

Computer equipment, software, furniture, leasehold improvements and the related accumulated depreciation at January 31 were as follows:


	2011			2010
Computer software, at cost	$	129.4		$	127.3
Computer hardware, at cost		123.7			108.5
Leasehold improvements, land and buildings, at cost		121.3			113.7
Furniture and equipment, at cost		43.6			42.9

		418.0			392.4
Less: Accumulated depreciation		(333.5	)		(290.8	)

Computer software, hardware, leasehold improvements, furniture and equipment, net	$	84.5		$	101.6

Software Development Costs

Software Development Costs

Other Intangible Assets, Net

Other Intangible Assets, Net

Other intangible assets and related accumulated amortization at January 31 were as follows:


	2011			2010
Purchased technologies, at cost(1)	$	313.1		$	311.5
Customer relationships and trade names, at cost(2)		179.1			176.5

		492.2			488.0
Less: Accumulated amortization		(373.4	)		(314.9	)

Other intangible assets, net	$	118.8		$	173.1

(1)

(2)

Customer relationships and trade names are included in “Other assets” in the Consolidated Balance Sheet.


	Year ending January 31,
2012	$	50.7
2013		37.0
2014		20.3
2015		8.5
2016		2.2
Thereafter		0.1

Total	$	118.8

Goodwill

Goodwill

The change in the carrying amount of goodwill during the year ended January 31, 2011 is as follows:


	Platform Solutions and Emerging Business		Architecture, Engineering and Construction			Manufacturing		Media and Entertainment			Total
Balance as of January 31, 2010
Goodwill	$	40.2	$	224.8		$	277.9	$	149.2		$	692.1
Accumulated impairment losses		—		—			—		(149.2	)		(149.2	)

		40.2		224.8			277.9		—			542.9

Goodwill acquired during the year		4.6		—			—		5.5			10.1
Effect of foreign currency translation, purchase accounting adjustments and other		0.5		(0.6	)		1.2		—			1.1

Balance as of January 31, 2011
Goodwill		45.3		224.2			279.1		154.7			703.3
Accumulated impairment losses		—		—			—		(149.2	)		(149.2	)

	$	45.3	$	224.2		$	279.1	$	5.5		$	554.1

The change in the carrying amount of goodwill during the year ended January 31, 2010 is as follows:


	Platform Solutions and Emerging Business			Architecture, Engineering and Construction		Manufacturing		Media and Entertainment			Total
Balance as of January 31, 2009
Goodwill	$	36.3		$	209.4	$	275.8	$	149.2		$	670.7
Accumulated impairment losses		—			—		—		(128.2	)		(128.2	)

		36.3			209.4		275.8		21.0			542.5

Impairment		—			—		—		(21.0	)		(21.0	)
Goodwill acquired during the year		14.1			3.0		—		—			17.1
Transfer of assets between segments		(10.1	)		10.1		—		—			—
Effect of foreign currency translation, purchase accounting adjustments and other		(0.1	)		2.3		2.1		—			4.3

Balance as of January 31, 2010
Goodwill		40.2			224.8		277.9		149.2			692.1
Accumulated impairment losses		—			—		—		(149.2	)		(149.2	)

	$	40.2		$	224.8	$	277.9	$	—		$	542.9

Purchase accounting adjustments reflect revisions made to the Company’s preliminary purchase price allocation during fiscal 2011 and 2010.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets

Deferred Tax Assets

Deferred Tax Assets

Revenue Recognition

Revenue Recognition

License and other revenue are comprised of two components: (1) all forms of product license revenue and (2) other revenue:

(1) All Forms of Product License Revenue

(2) Other Revenue

Other revenue includes revenue from consulting, training, Autodesk Developers Network and Creative Finishing customer support, and is recognized over time, as the services are performed.

Maintenance Revenue

Taxes Collected from Customers

Taxes Collected from Customers

Autodesk nets taxes collected from customers against those remitted to government authorities in our financial statements. Accordingly, taxes collected from customers are not reported as revenue.

Shipping and Handling Costs

Shipping and Handling Costs

Shipping and handling costs are included in cost of revenue for all periods presented.

Stock-based Compensation Expense

Stock-based Compensation Expense


	Fiscal Year Ended January 31,
	2011			2010			2009
Cost of license and other revenue	$	2.9		$	3.1		$	3.6
Marketing and sales		35.5			41.1			39.2
Research and development		27.4			30.0			29.3
General and administrative		14.9			19.4			17.4

Stock-based compensation expense related to stock awards and ESP Plan purchases		80.7			93.6			89.5
Tax benefit		(22.0	)		(22.2	)		(21.6	)

Stock-based compensation expense related to stock awards and ESP Plan purchases	$	58.7		$	71.4		$	67.9

Autodesk uses the Black-Scholes-Merton option-pricing model to estimate the fair value of stock-based awards based on the following assumptions:


	Fiscal Year Ended January 31, 2011		Fiscal Year Ended January 31, 2010		Fiscal Year Ended January 31, 2009
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	40 - 45%	33 - 47%	43 - 55%	43 - 73%	37 - 55%	36 - 41%
Range of expected lives (in years)	2.6 - 4.4	0.5 - 2.0	2.7 - 4.0	0.5 - 2.0	2.6 - 4.0	0.5 - 2.0
Expected dividends	0%	0%	0%	0%	0%	0%
Range of risk-free interest rates	0.84 - 1.85%	0.20 - 1.05%	1.02 - 2.42%	0.20 - 0.98%	1.01 - 3.40%	1.29 - 1.85%
Expected forfeitures	10.5 - 13.5%	10.5 - 13.5%	13.5%	13.5%	13.6%	13.6%

Autodesk estimates the expected life of stock-based awards using both exercise behavior and post-vesting termination behavior as well as consideration of outstanding options.

The risk-free interest rate used in the Black-Scholes-Merton option pricing model for stock-based awards is the historical yield on U.S. Treasury securities with equivalent remaining lives.

Advertising Expenses

Advertising Expenses

Advertising costs are expensed as incurred. Total advertising expenses incurred were $18.8 million in fiscal 2011, $18.4 million in fiscal 2010 and $16.4 million in fiscal 2009.

Net Income Per Share

Net Income Per Share

Accounting Standards Adopted in Fiscal 2011 AND Recently Issued Accounting Standards

Accounting Standards Adopted in Fiscal 2011

Recently Issued Accounting Standards

Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2011

Disclosure of Reclassification Amount


	2010			2009
Increase (Decrease) to Expense
Cost of license and other revenue	$	(7.9	)	$	(6.5	)
Cost of maintenance revenue		7.9			6.5

Schedule of Accounts, Notes, Loans and Financing Receivable

Accounts receivable, net, consisted of the following as of January 31:


	2011			2010
Trade accounts receivable	$	363.0		$	316.5
Less: Allowance for doubtful accounts		(4.2	)		(4.6	)
Product returns reserve		(10.6	)		(11.8	)
Partner programs and other obligations		(29.8	)		(22.7	)

Accounts receivable, net	$	318.4		$	277.4

Concentration Risk Disclosure

Geographical concentrations of consolidated cash, cash equivalents and marketable securities held by Autodesk as of January 31:


	2011			2010
United States		14	%		12	%
Other Americas		1	%		2	%
Europe, Middle East and Africa (“EMEA”)		49	%		48	%
Asia Pacific (“APAC”)		36	%		38	%

Property, Plant and Equipment

Computer equipment, software, furniture, leasehold improvements and the related accumulated depreciation at January 31 were as follows:


	2011			2010
Computer software, at cost	$	129.4		$	127.3
Computer hardware, at cost		123.7			108.5
Leasehold improvements, land and buildings, at cost		121.3			113.7
Furniture and equipment, at cost		43.6			42.9

		418.0			392.4
Less: Accumulated depreciation		(333.5	)		(290.8	)

Computer software, hardware, leasehold improvements, furniture and equipment, net	$	84.5		$	101.6

Schedule of Acquired Intangible Assets by Major Class

Other intangible assets and related accumulated amortization at January 31 were as follows:


	2011			2010
Purchased technologies, at cost(1)	$	313.1		$	311.5
Customer relationships and trade names, at cost(2)		179.1			176.5

		492.2			488.0
Less: Accumulated amortization		(373.4	)		(314.9	)

Other intangible assets, net	$	118.8		$	173.1

(1)

(2)

Customer relationships and trade names are included in “Other assets” in the Consolidated Balance Sheet.

Expected amortization expense

Expected future amortization expense for purchased technologies, customer relationships and trade names for each of the fiscal years ended thereafter is as follows:


	Year ending January 31,
2012	$	50.7
2013		37.0
2014		20.3
2015		8.5
2016		2.2
Thereafter		0.1

Total	$	118.8

Goodwill Disclosure

The change in the carrying amount of goodwill during the year ended January 31, 2011 is as follows:


	Platform Solutions and Emerging Business		Architecture, Engineering and Construction			Manufacturing		Media and Entertainment			Total
Balance as of January 31, 2010
Goodwill	$	40.2	$	224.8		$	277.9	$	149.2		$	692.1
Accumulated impairment losses		—		—			—		(149.2	)		(149.2	)

		40.2		224.8			277.9		—			542.9

Goodwill acquired during the year		4.6		—			—		5.5			10.1
Effect of foreign currency translation, purchase accounting adjustments and other		0.5		(0.6	)		1.2		—			1.1

Balance as of January 31, 2011
Goodwill		45.3		224.2			279.1		154.7			703.3
Accumulated impairment losses		—		—			—		(149.2	)		(149.2	)

	$	45.3	$	224.2		$	279.1	$	5.5		$	554.1

The change in the carrying amount of goodwill during the year ended January 31, 2010 is as follows:


	Platform Solutions and Emerging Business			Architecture, Engineering and Construction		Manufacturing		Media and Entertainment			Total
Balance as of January 31, 2009
Goodwill	$	36.3		$	209.4	$	275.8	$	149.2		$	670.7
Accumulated impairment losses		—			—		—		(128.2	)		(128.2	)

		36.3			209.4		275.8		21.0			542.5

Impairment		—			—		—		(21.0	)		(21.0	)
Goodwill acquired during the year		14.1			3.0		—		—			17.1
Transfer of assets between segments		(10.1	)		10.1		—		—			—
Effect of foreign currency translation, purchase accounting adjustments and other		(0.1	)		2.3		2.1		—			4.3

Balance as of January 31, 2010
Goodwill		40.2			224.8		277.9		149.2			692.1
Accumulated impairment losses		—			—		—		(149.2	)		(149.2	)

	$	40.2		$	224.8	$	277.9	$	—		$	542.9

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table summarizes stock-based compensation expense for fiscal 2011, 2010 and 2009, respectively, as follows:


	Fiscal Year Ended January 31,
	2011			2010			2009
Cost of license and other revenue	$	2.9		$	3.1		$	3.6
Marketing and sales		35.5			41.1			39.2
Research and development		27.4			30.0			29.3
General and administrative		14.9			19.4			17.4

Stock-based compensation expense related to stock awards and ESP Plan purchases		80.7			93.6			89.5
Tax benefit		(22.0	)		(22.2	)		(21.6	)

Stock-based compensation expense related to stock awards and ESP Plan purchases	$	58.7		$	71.4		$	67.9

Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used

Autodesk uses the Black-Scholes-Merton option-pricing model to estimate the fair value of stock-based awards based on the following assumptions:


	Fiscal Year Ended January 31, 2011		Fiscal Year Ended January 31, 2010		Fiscal Year Ended January 31, 2009
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	40 - 45%	33 - 47%	43 - 55%	43 - 73%	37 - 55%	36 - 41%
Range of expected lives (in years)	2.6 - 4.4	0.5 - 2.0	2.7 - 4.0	0.5 - 2.0	2.6 - 4.0	0.5 - 2.0
Expected dividends	0%	0%	0%	0%	0%	0%
Range of risk-free interest rates	0.84 - 1.85%	0.20 - 1.05%	1.02 - 2.42%	0.20 - 0.98%	1.01 - 3.40%	1.29 - 1.85%
Expected forfeitures	10.5 - 13.5%	10.5 - 13.5%	13.5%	13.5%	13.6%	13.6%

- Definition

Describe any adjustments made during the period to avoid double counting in comprehensive income items displayed as part of net income that also had been displayed as part of other comprehensive income in that period or earlier periods. These adjustments include reclassifications to net income of items in accumulated comprehensive income, such as deferred gains (losses) on qualifying hedges when hedged item reported in net income, holding gains (losses) on available-for-sale securities transferred into trading category, unrealized holding gains (losses) on debt securities transferred from held-to-maturity category into available-for-sale category and accumulated translation adjustment attributable to foreign subsidiary or investment in foreign entity upon sale or liquidation.

+ References+ Details

Financial Instruments and Hedging Activities (Tables)

12 Months Ended

Jan. 31, 2011

Cost and Fair Value of Financial Instruments Disclosure

The cost and fair value of Autodesk’s financial instruments are as follows:


	January 31, 2011				January 31, 2010
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Cash and cash equivalents	$	1,075.1	$	1,075.1	$	838.7	$	838.7
Marketable securities—short-term		197.5		199.2		164.8		161.9
Marketable securities—long-term		190.8		192.6		124.4		125.6
Foreign currency forward and option contracts		3.9		3.9		2.3		3.9

Marketable Securities

Marketable securities classified as “available-for-sale securities” include the following securities at January 31, 2011 and 2010:


	January 31, 2011
	Amortized Cost		Gross unrealized gains		Gross unrealized losses			Estimated Fair Value
Short-term available-for-sale securities:
Commercial paper and corporate securities	$	47.6	$	0.1	$	—		$	47.7
U.S. treasury securities		26.0		—		—			26.0
Certificates of deposit and time deposits		29.0		—		—			29.0
U.S. government agency securities		47.2		—		—			47.2
Sovereign debt		9.1		—		—			9.1
Municipal securities		8.6		—		—			8.6
Other		0.3		—		—			0.3

	$	167.8	$	0.1	$	—		$	167.9

Long-term available-for-sale securities:
Commercial paper and corporate securities	$	152.6	$	1.5	$	(0.1	)	$	154.0
U.S. government agency securities		12.7		0.2		—			12.9
Taxable auction-rate securities		4.2		—		—			4.2
Municipal securities		4.7		—		—			4.7
U.S. treasury securities		12.7		0.1		—			12.8
Sovereign debt		3.9		0.1		—			4.0

	$	190.8	$	1.9	$	(0.1	)	$	192.6


	January 31, 2010
	Amortized Cost		Gross unrealized gains		Gross unrealized losses		Estimated Fair Value
Short-term available-for-sale securities:
Commercial paper and corporate securities	$	88.8	$	0.2	$	—	$	89.0
Certificates of deposit and time deposits		24.6		—		—		24.6
Money market funds		10.0		—		—		10.0
U.S. government agency securities		8.8		—		—		8.8
Municipal securities		2.8		—		—		2.8
Other		0.4		—		—		0.4

	$	135.4	$	0.2	$	—	$	135.6

Long-term available-for-sale securities:
Corporate securities		94.9	$	1.0	$	—	$	95.9
U.S. government agency securities		9.1		0.1		—		9.2
Taxable auction-rate securities		7.6		—		—		7.6
Municipal securities		7.6		0.1		—		7.7
U.S. treasury securities		5.2		—		—		5.2

	$	124.4	$	1.2	$	—	$	125.6

Available-for-sale Securities

The following table summarizes the estimated fair value of our “available-for-sale securities” classified by the contractual maturity date of the security:


	January 31, 2011
	Cost		Fair Value
Due in 1 year	$	167.8	$	167.9
Due in 1 year through 5 years		186.6		188.4
Due in 5 years through 10 years		—		—
Due after 10 years		4.2		4.2

Total	$	358.6	$	360.5

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The fair value of derivative instruments in Autodesk’s Consolidated Balance Sheets were as follows as of January 31, 2011 and January 31, 2010:


	Balance Sheet Location	Fair Value at
	Balance Sheet Location	January 31, 2011		January 31, 2010
Derivative Assets
Foreign currency contracts designated as cash flow hedges	Prepaid expenses and other current assets	$	5.1	$	4.3
Derivatives not designated as hedging instruments			—		—

Total derivative assets			5.1		4.3


Derivative Liabilities
Foreign currency contracts designated as cash flow hedges	Other accrued liabilities	$	1.2	$	0.4
Derivatives not designated as hedging instruments			—		—

Total derivative liabilities		$	1.2	$	0.4

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance


	Foreign Currency Contracts
	Fiscal Year Ended January 31,
	2011		2010
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)	$	11.8	$	(2.5	)

Amount and Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
Net revenue	$	13.0	$	(10.9	)
Operating expenses		2.1		4.6

Total	$	15.1	$	(6.3	)

Amount and Location of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)(1)
Interest and other income (expense), net	$	0.1	$	1.3

(1)


	Foreign Exchange Contracts
	Fiscal Year Ended January 31,
	2011		2010
Amount and Location of Gain (Loss) Recognized in Income on Derivative
Interest and other income, net	$	2.3	$	0.9

- Definition

This item represents the entire disclosure related to Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References+ Details

Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2011

Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table summarizes Autodesk’s investments and financial instruments measured at fair value on a recurring basis as of January 31, 2011:


	Fair Value Measurements at January 31, 2011 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Total
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Cash equivalents(1):
Certificates of deposit and time deposits	$	97.9	$	285.4	$	—	$	383.3
Commercial paper		—		331.0		—		331.0
Money market funds		—		43.8		—		43.8
Marketable securities:
Commercial paper and corporate securities		191.6		10.0		—		201.6
U.S. government agency securities		60.1		—		—		60.1
U.S. treasury securities		38.8		—		—		38.8
Certificates of deposit and time deposits		25.0		4.0		—		29.0
Mutual funds		31.3		—		—		31.3
Sovereign debt		—		13.1		—		13.1
Municipal securities		13.4		—		—		13.4
Taxable auction-rate securities		—		—		4.2		4.2
Other		0.3		—		—		0.3
Foreign currency derivative contracts(2)		—		5.1		—		5.1

Total	$	458.4	$	692.4	$	4.2	$	1,155.0

Liabilities
Foreign currency derivative contracts(3)		—		1.2		—		1.2

Total	$	—	$	1.2	$	—	$	1.2

(1)

Included in “Cash and cash equivalents” in the accompanying Consolidated Balance Sheets.

(2)

Included in “Prepaid expenses and other current assets” in the accompanying Consolidated Balance Sheets.

(3)

Included in “Other accrued liabilities” in the accompanying Consolidated Balance Sheets.

The following table summarizes Autodesk’s investments and financial instruments measured at fair value on a recurring basis as of January 31, 2010:


	Fair Value Measurements at January 31, 2010 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs		Total
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Cash equivalents(1):
Certificates of deposit and time deposits	$	64.0	$	208.8	$	—	$	272.8
Commercial paper		—		299.5		—		299.5
Money market funds		—		49.4		—		49.4
Municipal securities		0.8		—		—		0.8
Marketable securities:
Commercial paper and corporate securities		115.9		69.0		—		184.9
Certificates of deposit and time deposits		20.0		4.6		—		24.6
U.S. government agency securities		18.0		—		—		18.0
Mutual funds		26.3		—		—		26.3
Municipal securities		10.5		—		—		10.5
Money market funds		—		—		10.0		10.0
Taxable auction-rate securities		—		—		7.6		7.6
U.S. treasury securities and sovereign debt		5.2		—		—		5.2
Other		0.4		—		—		0.4
Foreign currency derivative contracts(2)		—		4.3		—		4.3

Total	$	261.1	$	635.6	$	17.6	$	914.3

Liabilities
Foreign currency derivative contracts(3)		—		0.4		—		0.4

Total	$	—	$	0.4	$	—	$	0.4

(1)

Included in “Cash and cash equivalents” in the accompanying Consolidated Balance Sheets.

(2)

Included in “Prepaid expenses and other current assets” in the accompanying Consolidated Balance Sheets.

(3)

Included in “Other accrued liabilities” in the accompanying Consolidated Balance Sheets.

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

A reconciliation of the change in Autodesk’s Level 3 items for the fiscal years ended January 31, 2011 and 2010 was as follows:


	Fair Value Measurements Using Significant Unobservable Inputs
	(Level 3)
	Money Market Funds			Taxable Auction-Rate Securities			Total
Balance at January 31, 2009	$	33.3		$	7.6		$	40.9
Transfers into (out of) Level 3		—			—			—
Redemptions(1)		(23.3	)		—			(23.3	)
Total realized/unrealized gains (losses) included in earnings		—			—			—

Balance at January 31, 2010		10.0			7.6			17.6
Transfers into (out of) Level 3		—			—			—
Redemptions(1)		(11.7	)		(3.4	)		(15.1	)
Total realized/unrealized gains (losses) included in earnings		1.7			—			1.7

Balance at January 31, 2011	$	—		$	4.2		$	4.2

(1)

The redemptions of $10.0 million and $23.3 million for fiscal years ended January 31, 2011 and 2010, respectively, are from the International Fund.

Employee and Director Stock Plans (Tables)

12 Months Ended

Jan. 31, 2011

Schedule of Share-based Compensation, Options Activity

A summary of stock option activity for the fiscal year ended January 31, 2011 is as follows:


	Number of Shares			Weighted average exercise price per share
	(in millions)
Options outstanding at January 31, 2010		29.1		$	27.56
Granted		6.7			29.71
Exercised		(3.9	)		18.92
Cancelled		(1.5	)		32.06

Options outstanding at January 31, 2011		30.4		$	28.93

Options exercisable at January 31, 2011		17.6		$	31.26

Options available for grant at January 31, 2011		17.9

Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted

The intrinsic value of options exercised is calculated as the difference between the exercise price of the option and the market value of the stock on the date of exercise. The weighted average grant date fair value of stock options granted is calculated, as of the stock option grant date, using the Black-Scholes-Merton option pricing model.


	Fiscal year ended January 31,
	2011		2010		2009
Pre-tax intrinsic value of options exercised	$	61.9	$	18.8	$	46.7
Weighted average grant date fair value per share of stock options granted	$	9.30	$	6.13	$	9.82

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about options outstanding and exercisable at January 31, 2011:


	Options Exercisable								Options Outstanding
	Number of Shares (in millions)		Weighted average contractual life (in years)		Weighted average exercise price		Aggregate intrinsic value(1) (in millions)		Number of Shares (in millions)		Weighted average contractual life (in years)		Weighted average exercise price		Aggregate intrinsic value(1) (in millions)
Range of per-share exercise prices:
$0.61 – $16.53		3.5			$	11.30				7.4			$	13.10
$17.37 – $29.49		2.8				23.89				8.3				27.10
$29.50 – $35.00		3.2				32.21				6.1				31.77
$35.30 – $45.29		7.4				41.53				7.9				41.60
$47.24 – $49.80		0.7				48.59				0.7				48.61

		17.6		2.4	$	31.26	$	187.9		30.4		3.7	$	28.93	$	380.9

(1)

Restricted Share Activity Disclosure

A summary of restricted stock award and restricted stock unit activity for the fiscal year ended January 31, 2011 is as follows:


	Unreleased Restricted Stock			Weighted average grant date fair value
	(in thousands)
Unreleased restricted stock at January 31, 2010		855		$	24.77
Awarded		628			37.48
Released		(30	)		22.46
Forfeited		(26	)		24.17

Unreleased restricted stock at January 31, 2011		1,427		$	30.43

Employee and Director Stock Options Outstanding


	(a)		(b)		(c)
Plan category	Number of securities to be issued upon exercise of outstanding options		Weighted-average exercise price of outstanding options		Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Equity compensation plans approved by security holders		31.1	$	28.06		45.7	(1)
Equity compensation plans not approved security holders(2)		0.7		10.39		—

Total		31.8	$	27.65		45.7

(1)

Included in this amount are 27.8 million securities available for future issuance under Autodesk’s ESP Plan.

(2)

Amounts correspond to Autodesk’s Nonstatutory Stock Option Plan, which was terminated by the Board of Directors in December 2004.

Income Taxes (Tables)

12 Months Ended

Jan. 31, 2011

Components of Consolidated Income Taxes

The provision for income taxes consists of the following:


	Fiscal year ended January 31,
	2011			2010			2009
Federal:
Current	$	16.0		$	12.3		$	20.9
Deferred		(8.2	)		(33.0	)		0.7
State:
Current		(1.5	)		3.0			5.9
Deferred		7.4			7.1			(0.7	)
Foreign:
Current		48.4			34.1			54.2
Deferred		(2.1	)		3.2			(12.1	)

	$	60.0		$	26.7		$	68.9

Reconciliation of the US Statutory Federal Tax Rate

The differences between the U.S. statutory rate and the aggregate income tax provision are as follows:


	Fiscal year ended January 31,
	2011			2010			2009
Income tax provision at U.S. Federal statutory rate	$	95.2		$	29.7		$	88.3
State income tax expense (benefit), net of the U.S. Federal benefit		1.4			(0.6	)		(1.5	)
Foreign income taxed at rates different from the U.S. statutory rate		(39.7	)		(22.7	)		(55.6	)
U.S. valuation allowance		2.8			14.9			(0.2	)
Non-deductible stock-based compensation		7.9			11.7			11.8
Research and development tax credit benefit		(5.6	)		(4.7	)		(6.9	)
Tax benefit from closure of income tax audits and decreases in uncertain tax positions		(2.8	)		(2.5	)		(6.2	)
Officer compensation in excess of $1.0 million		0.5			0.3			0.2
Goodwill impairment		—			—			30.6
Non-deductible in-process research and development charge		—			—			7.0
Other		0.3			0.6			1.4

	$	60.0		$	26.7		$	68.9

Deferred Tax Assets and Liabilities

Significant components of Autodesk’s deferred tax assets and liabilities are as follows:


	January 31,
	2011			2010
Nonqualified stock options	$	69.0		$	57.5
Research and development tax credit carryforwards		64.0			55.7
Foreign tax credit carryforwards		16.6			26.8
Accrued compensation and benefits		33.7			25.7
Other accruals not currently deductible for tax		18.7			17.8
Purchased technology and capitalized software		22.8			12.7
Fixed assets		15.1			12.0
Tax loss carryforwards		6.3			11.3
Capitalized research and development expenditures		2.5			3.4
Reserves for product returns and bad debts		2.1			2.1
Other		2.6			2.2

Total deferred tax assets		253.4			227.2
Less: valuation allowance		(42.9	)		(39.0	)

Net deferred tax assets		210.5			188.2

Tax method change on advanced payments		(9.4	)		—
Unremitted earnings of foreign subsidiaries		(53.6	)		(42.1	)

Total deferred tax liability		(63.0	)		(42.1	)

Net deferred tax assets	$	147.5		$	146.1

Unrecognized Tax Benefits Reconciliation, Table

A reconciliation of the beginning and ending amount of the gross unrecognized tax benefits is as follows:


	2011			2010			2009
Gross unrecognized tax benefits at the beginning of the fiscal year	$	178.2		$	169.4		$	152.4
Increases for tax positions of prior years		2.0			3.1			1.2
Decreases for tax positions of prior years		(3.5	)		(1.9	)		(7.0	)
Increases for tax positions related to the current year		13.9			11.1			25.8
Decreases for lapse of statute of limitations/audit settlements		(2.2	)		(3.5	)		(3.0	)

Gross unrecognized tax benefits at the end of the fiscal year	$	188.4		$	178.2		$	169.4

Commitments and Contingencies (Tables)

12 Months Ended

Jan. 31, 2011

Operating Leases of Lessee Disclosure

At January 31, 2011, the aggregate future minimum lease payments required were as follows:


2012	$	52.7
2013		44.0
2014		34.6
2015		26.4
2016		21.1
Thereafter		54.1

		232.9
Less: Sublease income		4.2

	$	228.7

Rent Expense

Rent expense related to these operating leases recognized on a straight-line basis over the lease period, was as follows:


	Fiscal Year Ended January 31,
	2011		2010		2009
Rent expense	$	52.1	$	56.8	$	73.1

- Definition

General description of lessee's leasing arrangements including: (1) The basis on which contingent rental payments are determined, (2) The existence and terms of renewal or purchase options and escalation clauses, (3) Restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, (4) Rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. Disclosure may also include the specific period used to amortize material leasehold improvements made at the inception of the lease or during the lease term. Additionally, for operating leases having initial or remaining noncancelable lease terms in excess of one year: (a) future minimum rental payments required as of the date of the latest balance sheet presented, in the aggregate and for each of the five succeeding fiscal years, (b) the total of minimum rentals to be received in the future under noncancelable subleases as of the date of the latest balance sheet presented, and (c) for all operating leases, rental expense for each period for which an income statement is presented, with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included.

+ References+ Details

Segments (Tables)

12 Months Ended

Jan. 31, 2011

Schedule of Segment Reporting Information, by Segment

Information concerning the operations of Autodesk’s reportable segments is as follows:


	Fiscal year ended January 31,
	2011			2010			2009
Net revenue:
Platform Solutions and Emerging Business	$	716.2		$	624.0		$	900.8
Architecture, Engineering and Construction		568.0			513.3			641.4
Manufacturing		470.0			386.9			488.4
Media and Entertainment		197.6			189.1			262.1
Other(1)		—			0.4			22.5

	$	1,951.8		$	1,713.7		$	2,315.2

Gross profit:
Platform Solutions and Emerging Business	$	678.9		$	589.7		$	860.7
Architecture, Engineering and Construction		517.6			465.2			592.7
Manufacturing		439.5			358.4			456.9
Media and Entertainment		153.9			144.4			197.6
Unallocated(2)		(34.7	)		(35.8	)		(11.8	)

	$	1,755.2		$	1,521.9		$	2,096.1

Depreciation and amortization:
Platform Solutions and Emerging Business	$	3.0		$	3.1		$	2.4
Architecture, Engineering and Construction		1.6			1.8			2.1
Manufacturing		2.3			2.5			2.6
Media and Entertainment		1.1			1.8			2.5
Unallocated		97.4			102.3			82.8

	$	105.4		$	111.5		$	92.4

(1)

Other primarily consisted of revenue from Autodesk’s Location Services division, which Autodesk disposed of in February 2009.

(2)

Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including stock-based compensation expense.

Schedule of Revenue and Long Lived Assets by Geographic Location

Information regarding Autodesk’s operations by geographic area is as follows:


	Fiscal year ended January 31,
	2011		2010		2009
Net revenue:
Americas
U.S.	$	561.6	$	527.5	$	646.4
Other Americas		139.9		126.9		135.9

Total Americas		701.5		654.4		782.3

Europe, Middle East and Africa		782.8		671.1		1,003.4

Asia Pacific
Japan		200.6		171.1		213.2
Other Asia Pacific		266.9		217.1		316.3

Total Asia Pacific		467.5		388.2		529.5

Total net revenue	$	1,951.8	$	1,713.7	$	2,315.2


	January 31,
	2011		2010
Long-lived assets(1):
Americas
U.S.	$	571.2	$	611.3
Other Americas		65.6		78.9

Total Americas		636.8		690.2

Europe, Middle East and Africa
Switzerland		42.8		49.3
Other Europe, Middle East and Africa		68.5		56.9

Total Europe, Middle East and Africa		111.3		106.2

Asia Pacific		41.9		43.7

Total long-lived assets	$	790.0	$	840.1

(1)

Long-lived assets exclude investments in subsidiaries, deferred tax assets and marketable securities.

Business Combinations (Tables)

12 Months Ended

Jan. 31, 2011

Schedule of Business Acquisitions, by Acquisition

Management’s allocation of the purchase price consideration, based on a valuation of the acquired assets and liabilities, was as follows:


PlanPlatform:
In-process research and development	$	1.3
Goodwill		14.1
Net tangible assets		2.6

	$	18.0

Restructuring Reserves (Tables)

12 Months Ended

Jan. 31, 2011

Schedule of Restructuring Reserve by Type of Cost

The following table sets forth the restructuring activities for the fiscal years ended January 31, 2011 and 2010.


	Balance at January 31, 2010		Additions		Payments			Adjustments(1)			Balance at January 31, 2011
*Fiscal 2011 Plan*
Employee termination costs	$	—	$	12.4	$	(10.6	)	$	(0.3	)	$	1.5

*Fiscal 2010 Plan*
Employee termination costs		0.8		—		(0.8	)		—			—
Lease termination and asset costs		6.1		0.3		(4.3	)		(0.4	)		1.7

*Fiscal 2009 Plan*
Employee termination costs		1.0		—		(0.2	)		(0.8	)		—
Lease termination and asset costs		8.2		1.0		(4.6	)		(1.8	)		2.8

*Other*
Employee termination costs		0.4		—		(0.3	)		(0.1	)		—
Lease termination costs		2.9		—		(0.2	)		(0.1	)		2.6

Total	$	19.4	$	13.7	$	(21.0	)	$	(3.5	)	$	8.6

Current portion(2)	$	11.4									$	4.8
Non-current portion(2)		8.0										3.8

Total	$	19.4									$	8.6


	Balance at January 31, 2009		Additions		Payments			Adjustments(1)			Balance at January 31, 2010
*Fiscal 2010 Plan*
Employee termination costs	$	—	$	20.0	$	(18.2	)	$	(1.0	)	$	0.8
Lease termination and asset costs		—		9.9		(3.4	)		(0.4	)		6.1

*Fiscal 2009 Plan*
Employee termination costs		35.4		5.8		(37.8	)		(2.4	)		1.0
Lease termination and asset costs		2.8		12.2		(6.7	)		(0.1	)		8.2

*Other*
Employee termination costs		0.9		0.3		(0.4	)		(0.4	)		0.4
Lease termination costs		4.8		0.7		(1.8	)		(0.8	)		2.9

Total	$	43.9	$	48.9	$	(68.3	)	$	(5.1	)	$	19.4

Current portion(2)	$	38.4									$	11.4
Non-current portion(2)		5.5										8.0

Total	$	43.9									$	19.4

(1)

Adjustments include the impact of foreign currency translation.

(2)

The current and non-current portions of the reserve are recorded in the Consolidated Balance Sheets under “Other accrued liabilities” and “Other liabilities,” respectively.

Selected Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Jan. 31, 2011

Quarterly Financial Information Table

Summarized quarterly financial information for fiscal 2011 and 2010 is as follows:


2011	1st quarter			2nd quarter			3rd quarter			4th quarter			Fiscal year
Net revenue	$	474.6		$	472.8		$	476.7		$	527.7		$	1,951.8
Gross profit		423.3			424.4			428.2			479.3			1,755.2
Income from operations		50.8			79.8			69.2			71.6			271.4
Provision for income taxes		(10.5	)		(20.0	)		(18.1	)		(11.4	)		(60.0	)
Net income		36.9			59.9			53.6			61.6			212.0
Basic net income per share	$	0.16		$	0.26		$	0.24		$	0.27		$	0.93
Diluted net income per share	$	0.16		$	0.25		$	0.23		$	0.26		$	0.90

Income from operations includes the following items:
Stock-based compensation expense	$	24.3		$	21.0		$	17.0		$	18.4		$	80.7
Amortization of acquisition related intangibles		13.9			13.6			14.1			14.3			55.9
Restructuring charges		7.1			1.9			—			1.8			10.8

2010	1st quarter			2nd quarter			3rd quarter			4th quarter			Fiscal year
Net revenue	$	425.8		$	414.9		$	416.9		$	456.1		$	1,713.7
Gross profit		373.5			364.8			371.9			411.7			1,521.9
Income (loss) from operations		(19.4	)		2.7			26.3			56.0			65.6
Provision for income taxes		(12.7	)		(2.9	)		(2.5	)		(8.6	)		(26.7	)
Net income (loss)		(32.1	)		10.5			29.5			50.1			58.0
Basic net income (loss) per share	$	(0.14	)	$	0.05		$	0.13		$	0.22		$	0.25
Diluted net income (loss) per share	$	(0.14	)	$	0.05		$	0.13		$	0.21		$	0.25

Income from operations includes the following items:
Stock-based compensation expense	$	23.0		$	21.4		$	30.3		$	18.9		$	93.6
Amortization of acquisition related intangibles		14.7			15.0			15.1			13.6			58.4
Restructuring charges		16.5			26.4			4.9			0.4			48.2
Impairment of goodwill		21.0			—			—			—			21.0

Provision for income taxes includes the following item:
Establishment of valuation allowance on deferred tax assets	$	(21.0	)	$	—		$	—		$	—		$	(21.0	)

FINANCIAL STATEMENT SCHEDULE II (Tables)

12 Months Ended

Jan. 31, 2011

Schedule of Valuation and Qualifying Accounts Disclosure Table


Description	Balance at Beginning of Year		Additions Charged to Costs and Expenses or Revenues			Deductions and Write-Offs		Balance at End of Year
	(in millions)
Fiscal year ended January 31, 2011
Allowance for doubtful accounts	$	4.6	$	(0.3	)	$	0.1	$	4.2
Product returns reserves		11.8		38.9			40.1		10.6
Restructuring		19.4		13.7			24.5		8.6

Fiscal year ended January 31, 2010
Allowance for doubtful accounts	$	8.6	$	1.7		$	5.7	$	4.6
Product returns reserves		12.5		42.9			43.6		11.8
Restructuring		43.9		48.9			73.4		19.4

Fiscal year ended January 31, 2009
Allowance for doubtful accounts	$	7.8	$	5.1		$	4.3	$	8.6
Product returns reserves		14.3		53.1			54.9		12.5
Restructuring		5.6		43.0			4.7		43.9

Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Apr. 30, 2009	Jan. 31, 2011 Year Month	Jan. 31, 2010	Jan. 31, 2009
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Derivative financial instruments, maturities, minimum (in months)		1
Derivative financial instruments, maturities, maximum (in months)		12
U.S. line of credit		$ 250.0
Auction rate securities, fair value		4.2
Total sales to the distributors Tech Data Corporation and its global affiliates ("Tech Data") relative to Autodesk's consolidated net revenue		16.00%	14.00%	14.00%
Estimated fair value		391.8
Estimated useful lives of computer equipment, software and furniture, minimum (in years)		2
Estimated useful lives of computer equipment, software and furniture, maximum (in years)		5
Computer equipment, software, furniture and leasehold improvements, depreciation		47.6	50.4	46.2
Other intangible assets, estimated economic life, minimum (in years)		2
Other intangible assets, estimated economic life, maximum (in years)		7
Amortization expense for purchased technologies, customer relationships and trade names		57.8	61.2	41.5
Advertising costs		18.8	18.4	16.4
Impact on carrying value of goodwill		A hypothetical 10% decrease in the fair value of Autodesk’s Platform Solutions and Emerging Business; Manufacturing; Architecture, Engineering and Construction; or Media and Entertainment reporting units would not have an impact on the carrying value, nor result in an impairment, of goodwill shown on Autodesk’s balance sheet as of January 31, 2011 for the respective reporting units.
Expected dividend yield		0.00%
Impairment	(21.0)		(21.0)
Cumulative error from the understatement of stock-based compensation, net of tax effects			6.8
Media and Entertainment
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Impairment	(21.0)		(21.0)	(128.2)
Cost of license and other revenue
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Cumulative error from the understatement of stock-based compensation, net of tax effects			0.4
Marketing and sales
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Cumulative error from the understatement of stock-based compensation, net of tax effects			4.4
Research and development
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Cumulative error from the understatement of stock-based compensation, net of tax effects			2.9
General and administrative
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Cumulative error from the understatement of stock-based compensation, net of tax effects			2.1
Reduction in taxes
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Cumulative error from the understatement of stock-based compensation, net of tax effects			3.0
Software
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Expected useful life of the software (in years)		3
Software and Software Development Costs
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Amortization period of software development costs (in years)		1
Purchased Technologies, Customer Relationships and Trade Names
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Weighted average amortization period (in years)		3.2
Accounts Receivable
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Percentage of gross accounts receivable accounted for by Tech Data		16.00%	15.00%
Long-term available-for-sale securities
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated fair value		192.6	125.6
Long-term available-for-sale securities \| Taxable auction rate securities
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated fair value		$ 4.2	$ 7.6

Accounts Receivable, Net (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable	$ 363.0	$ 316.5
Less: Allowance for doubtful accounts	(4.2)	(4.6)
Product returns reserve	(10.6)	(11.8)
Partner programs and other obligations	(29.8)	(22.7)
Accounts receivable, net	$ 318.4	$ 277.4

Computer Equipment, Software, Furniture, Leasehold Improvements and the Related Accumulated Depreciation (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Property, Plant and Equipment [Line Items]
Computer software, at cost	$ 129.4	$ 127.3
Computer hardware, at cost	123.7	108.5
Leasehold improvements, land and buildings, at cost	121.3	113.7
Furniture and equipment, at cost	43.6	42.9
Property, Plant and Equipment, Gross, Total	418.0	392.4
Less: Accumulated depreciation	(333.5)	(290.8)
Computer software, hardware, leasehold improvements, furniture and equipment, net	$ 84.5	$ 101.6

Other Intangible Assets and Related Accumulated Amortization (Detail) (USD $)
In Millions, unless otherwise specified

Jan. 31, 2011

Jan. 31, 2010

Finite-Lived Intangible Assets [Line Items]

Purchased technologies, at cost

$ 313.1

^[1]

$ 311.5

^[1]

Customer relationships and trade names, at cost

179.1

^[2]

176.5

^[2]

Finite-Lived Intangible Assets, Gross, Total

492.2

488.0

Less: Accumulated amortization

(373.4)

(314.9)

Other intangible assets, net

$ 118.8

$ 173.1

[1]

[2]

Customer relationships and trade names are included in "Other assets" in the Consolidated Balance Sheet.

Expected Future Amortization Expense for Purchased Technologies, Customer Relationships and Trade Names (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011
Expected Amortization Expense [Line Items]
2012	$ 50.7
2013	37.0
2014	20.3
2015	8.5
2016	2.2
Thereafter	0.1
Total	$ 118.8

Changes in the Carrying Amount of Goodwill (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Apr. 30, 2009	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Goodwill [Line Items]
Goodwill before accumulated impairment losses beginning balance	$ 670.7	$ 692.1	$ 670.7
Accumulated impairment losses beginning balance	(128.2)	(149.2)	(128.2)
Beginning Balance	542.5	542.9	542.5
Impairment	(21.0)		(21.0)
Goodwill acquired during the year		10.1	17.1
Effect of foreign currency translation, purchase accounting adjustments and other		1.1	4.3
Goodwill before accumulated impairment losses ending balance		703.3	692.1
Accumulated impairment losses ending balance		(149.2)	(149.2)
Ending Balance		554.1	542.9
Platform Solutions and Emerging Business
Goodwill [Line Items]
Goodwill before accumulated impairment losses beginning balance	36.3	40.2	36.3
Beginning Balance	36.3	40.2	36.3
Goodwill acquired during the year		4.6	14.1
Transfer of assets between segments			(10.1)
Effect of foreign currency translation, purchase accounting adjustments and other		0.5	(0.1)
Goodwill before accumulated impairment losses ending balance		45.3	40.2
Ending Balance		45.3	40.2
Architecture, Engineering and Construction
Goodwill [Line Items]
Goodwill before accumulated impairment losses beginning balance	209.4	224.8	209.4
Beginning Balance	209.4	224.8	209.4
Goodwill acquired during the year			3.0
Transfer of assets between segments			10.1
Effect of foreign currency translation, purchase accounting adjustments and other		(0.6)	2.3
Goodwill before accumulated impairment losses ending balance		224.2	224.8
Ending Balance		224.2	224.8
Manufacturing
Goodwill [Line Items]
Goodwill before accumulated impairment losses beginning balance	275.8	277.9	275.8
Beginning Balance	275.8	277.9	275.8
Effect of foreign currency translation, purchase accounting adjustments and other		1.2	2.1
Goodwill before accumulated impairment losses ending balance		279.1	277.9
Ending Balance		279.1	277.9
Media and Entertainment
Goodwill [Line Items]
Goodwill before accumulated impairment losses beginning balance	149.2	149.2	149.2
Accumulated impairment losses beginning balance	(128.2)	(149.2)	(128.2)
Beginning Balance	21.0		21.0
Impairment	(21.0)		(21.0)	(128.2)
Goodwill acquired during the year		5.5
Goodwill before accumulated impairment losses ending balance		154.7	149.2	149.2
Accumulated impairment losses ending balance		(149.2)	(149.2)	(128.2)
Ending Balance		$ 5.5		$ 21.0

Stock-Based Compensation Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2010	Oct. 31, 2009	Jul. 31, 2009	Apr. 30, 2009	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense related to stock awards and ESP Plan purchases	$ 18.4	$ 17.0	$ 21.0	$ 24.3	$ 18.9	$ 30.3	$ 21.4	$ 23.0	$ 80.7	$ 93.6	$ 89.5
Tax benefit									(22.0)	(22.2)	(21.6)
Stock-based compensation expense related to stock awards and ESP Plan purchases									58.7	71.4	67.9
Cost of license and other revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense									2.9	3.1	3.6
Marketing and sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense									35.5	41.1	39.2
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense									27.4	30.0	29.3
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense									$ 14.9	$ 19.4	$ 17.4

Assumption Used to Estimate the Fair Value of Stock-Based Awards (Detail)	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected dividends	0.00%
Stock Option Plans
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected dividends	0.00%	0.00%	0.00%
Stock Option Plans \| Lower Limit
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected volatilities	40.00%	43.00%	37.00%
Expected lives (in years)	2.6	2.7	2.6
Risk-free interest rates	0.84%	1.02%	1.01%
Expected forfeitures	10.50%	13.50%	13.60%
Stock Option Plans \| Upper Limit
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected volatilities	45.00%	55.00%	55.00%
Expected lives (in years)	4.4	4.0	4.0
Risk-free interest rates	1.85%	2.42%	3.40%
Expected forfeitures	13.50%	13.50%	13.60%
ESP Plan
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected dividends	0.00%	0.00%	0.00%
ESP Plan \| Lower Limit
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected volatilities	33.00%	43.00%	36.00%
Expected lives (in years)	0.5	0.5	0.5
Risk-free interest rates	0.20%	0.20%	1.29%
Expected forfeitures	10.50%	13.50%	13.60%
ESP Plan \| Upper Limit
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]
Expected volatilities	47.00%	73.00%	41.00%
Expected lives (in years)	2.0	2.0	2.0
Risk-free interest rates	1.05%	0.98%	1.85%
Expected forfeitures	13.50%	13.50%	13.60%

Cost and Fair Value of Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009	Jan. 31, 2008
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cash and cash equivalents	$ 1,075.1	$ 838.7	$ 917.6	$ 917.9
Marketable securities-short-term	199.2	161.9
Marketable securities-long-term	192.6	125.6
Amortized Cost
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cash and cash equivalents	1,075.1	838.7
Marketable securities-short-term	197.5	164.8
Marketable securities-long-term	190.8	124.4
Foreign currency forward and option contracts	3.9	2.3
Fair Value
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cash and cash equivalents	1,075.1	838.7
Marketable securities-short-term	199.2	161.9
Marketable securities-long-term	192.6	125.6
Foreign currency forward and option contracts	$ 3.9	$ 3.9

- Definition

Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents.

+ References+ Details

Financial Instruments and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011 Month	Jan. 31, 2010	Jan. 31, 2009
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Available-for-sale securities gross gains (losses)	$ 1.7	$ 0	$ 0
Proceeds from the sale and maturity of marketable securities	410.7	355.1	83.4
Estimated fair value	391.8
Derivative financial instruments, maturities, minimum (in months)	1
Derivative financial instruments, maturities, maximum (in months)	12
Notional amount of foreign currency option collar and forward contracts designated as cash flow hedges	345.5	239.1
Gain expected to be recognized into earnings	0.8
Notional amount of foreign currency forward contracts not designated as cash flow hedges	56.1	19.6
Short-term available-for-sale securities
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Estimated fair value	167.9	135.6
Short-term available-for-sale securities \| Mutual Funds
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Trading securities	31.3	26.3
Trading securities, unrealized gains	1.6
Trading securities, cost	29.7	29.4
Trading securities, unrealized (losses)		(3.1)
Short-term available-for-sale securities \| Money market funds
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Estimated fair value		10.0
Short-term available-for-sale securities \| Money market funds \| International Fund
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Estimated fair value		10.0
Long-term available-for-sale securities
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Estimated fair value	192.6	125.6
Long-term available-for-sale securities \| Taxable auction rate securities
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Estimated fair value	4.2	7.6
Long-term available-for-sale securities \| Taxable auction rate securities \| Redeemed Securities
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Estimated fair value	$ 3.4

Available-For-Sale Marketable Securities (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Estimated Fair Value	$ 391.8
Short-term available-for-sale securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	167.8	135.4
Gross unrealized gains	0.1	0.2
Estimated Fair Value	167.9	135.6
Short-term available-for-sale securities \| Commercial paper and corporate securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	47.6	88.8
Gross unrealized gains	0.1	0.2
Estimated Fair Value	47.7	89.0
Short-term available-for-sale securities \| U.S. Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	26.0
Estimated Fair Value	26.0
Short-term available-for-sale securities \| Certificates of deposit and time deposits
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	29.0	24.6
Estimated Fair Value	29.0	24.6
Short-term available-for-sale securities \| US government agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	47.2	8.8
Estimated Fair Value	47.2	8.8
Short-term available-for-sale securities \| Sovereign Debt
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9.1
Estimated Fair Value	9.1
Short-term available-for-sale securities \| Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8.6	2.8
Estimated Fair Value	8.6	2.8
Short-term available-for-sale securities \| Other
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0.3	0.4
Estimated Fair Value	0.3	0.4
Short-term available-for-sale securities \| Money market funds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost		10.0
Estimated Fair Value		10.0
Long-term available-for-sale securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	190.8	124.4
Gross unrealized gains	1.9	1.2
Gross unrealized losses	(0.1)
Estimated Fair Value	192.6	125.6
Long-term available-for-sale securities \| Commercial paper and corporate securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	152.6	94.9
Gross unrealized gains	1.5	1.0
Gross unrealized losses	(0.1)
Estimated Fair Value	154.0	95.9
Long-term available-for-sale securities \| U.S. Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12.7	5.2
Gross unrealized gains	0.1
Estimated Fair Value	12.8	5.2
Long-term available-for-sale securities \| US government agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12.7	9.1
Gross unrealized gains	0.2	0.1
Estimated Fair Value	12.9	9.2
Long-term available-for-sale securities \| Sovereign Debt
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3.9
Gross unrealized gains	0.1
Estimated Fair Value	4.0
Long-term available-for-sale securities \| Municipal securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4.7	7.6
Gross unrealized gains		0.1
Estimated Fair Value	4.7	7.7
Long-term available-for-sale securities \| Taxable auction rate securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4.2	7.6
Estimated Fair Value	$ 4.2	$ 7.6

Contractual Maturities of Types of Securities (Detail) (USD $)	Jan. 31, 2011
Investments Classified by Contractual Maturity Date [Line Items]
Due in 1 year	$ 167.8
Due in 1 year through 5 years	186.6
Due in 5 years through 10 years
Due after 10 years	4.2
Total	358.6
Due in 1 year	167.9
Due in 1 year through 5 years	188.4
Due in 5 years through 10 years
Due after 10 years	4.2
Total	$ 360.5

Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Derivatives, Fair Value [Line Items]
Derivatives not designated as hedging instruments
Total derivative assets	5.1	4.3
Derivatives not designated as hedging instruments
Total derivative liabilities	1.2	0.4
Foreign exchange contracts \| Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Foreign currency contracts designated as cash flow hedges	5.1	4.3
Foreign exchange contracts \| Other accrued liabilities
Derivatives, Fair Value [Line Items]
Foreign currency contracts designated as cash flow hedges	$ 1.2	$ 0.4

Effects of Derivative Instruments on Condensed Consolidated Statements of Operations (Detail) (Foreign exchange contracts, USD $)
In Millions, unless otherwise specified

12 Months Ended

Jan. 31, 2011

Jan. 31, 2010

Fair Value Hedging

Derivative Instruments, Gain (Loss) [Line Items]

Amount of Gain (Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)

$ 11.8

$ (2.5)

Amount and Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)

15.1

(6.3)

Fair Value Hedging | Net revenue

Derivative Instruments, Gain (Loss) [Line Items]

Amount and Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)

13.0

(10.9)

Fair Value Hedging | Operating expenses

Derivative Instruments, Gain (Loss) [Line Items]

Amount and Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)

2.1

4.6

Fair Value Hedging | Interest and other income, net

Derivative Instruments, Gain (Loss) [Line Items]

Amount and Location of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)

0.1

^[1]

1.3

^[1]

Derivatives Not Designated as Hedging Instruments | Interest and other income, net

Derivative Instruments, Gain (Loss) [Line Items]

Amount and Location of Gain (Loss) Recognized in Income on Derivative

$ 2.3

$ 0.9

[1]	Includes $1.0 million net gain recognized for the fiscal year ended January 31, 2010 due to previously forecasted transactions that did not occur within the originally specified time period or the additional period of time allowed.

Investments and Financial Instruments Measured at Fair Value on a Recurring Basis (Detail) (USD $)
In Millions, unless otherwise specified

Jan. 31, 2011

Jan. 31, 2010

Assets

Foreign currency derivative contracts

$ 5.1

^[1]

$ 4.3

^[1]

Total

1,155.0

914.3

Liabilities

Foreign currency derivative contracts

1.2

^[2]

0.4

^[2]

Total

1.2

0.4

Certificates of deposit and time deposits

Assets

Cash equivalents

383.3

^[3]

272.8

^[3]

Marketable securities

29.0

24.6

Commercial Paper

Assets

Cash equivalents

331.0

^[3]

299.5

^[3]

Money market funds

Assets

Cash equivalents

43.8

^[3]

49.4

^[3]

Marketable securities

10.0

Commercial paper and corporate securities

Assets

Marketable securities

201.6

184.9

US government agency securities

Assets

Marketable securities

60.1

18.0

U.S. Treasury Securities and Sovereign Debt

Assets

Marketable securities

38.8

5.2

Mutual Funds

Assets

Marketable securities

31.3

26.3

Sovereign Debt

Assets

Marketable securities

13.1

Municipal securities

Assets

Cash equivalents

0.8

Marketable securities

13.4

10.5

Taxable auction rate securities

Assets

Marketable securities

4.2

7.6

Other

Assets

Marketable securities

0.3

0.4

Quoted Prices in Active Markets for Identical Assets ( Level 1)

Assets

Total

458.4

261.1

Quoted Prices in Active Markets for Identical Assets ( Level 1) | Certificates of deposit and time deposits

Assets

Cash equivalents

97.9

^[3]

64.0

^[3]

Marketable securities

25.0

20.0

Quoted Prices in Active Markets for Identical Assets ( Level 1) | Commercial paper and corporate securities

Assets

Marketable securities

191.6

115.9

Quoted Prices in Active Markets for Identical Assets ( Level 1) | US government agency securities

Assets

Marketable securities

60.1

18.0

Quoted Prices in Active Markets for Identical Assets ( Level 1) | U.S. Treasury Securities and Sovereign Debt

Assets

Marketable securities

38.8

5.2

Quoted Prices in Active Markets for Identical Assets ( Level 1) | Mutual Funds

Assets

Marketable securities

31.3

26.3

Quoted Prices in Active Markets for Identical Assets ( Level 1) | Municipal securities

Assets

Cash equivalents

0.8

Marketable securities

13.4

10.5

Quoted Prices in Active Markets for Identical Assets ( Level 1) | Other

Assets

Marketable securities

0.3

0.4

Significant Other Observable Inputs (Level 2)

Assets

Foreign currency derivative contracts

5.1

^[1]

4.3

^[1]

Total

692.4

635.6

Liabilities

Foreign currency derivative contracts

1.2

^[2]

0.4

^[2]

Total

1.2

0.4

Significant Other Observable Inputs (Level 2) | Certificates of deposit and time deposits

Assets

Cash equivalents

285.4

^[3]

208.8

^[3]

Marketable securities

4.0

4.6

Significant Other Observable Inputs (Level 2) | Commercial Paper

Assets

Cash equivalents

331.0

^[3]

299.5

^[3]

Significant Other Observable Inputs (Level 2) | Money market funds

Assets

Cash equivalents

43.8

^[3]

49.4

^[3]

Significant Other Observable Inputs (Level 2) | Commercial paper and corporate securities

Assets

Marketable securities

10.0

69.0

Significant Other Observable Inputs (Level 2) | Sovereign Debt

Assets

Marketable securities

13.1

Significant Unobservable Inputs (Level 3)

Assets

Total

4.2

17.6

Significant Unobservable Inputs (Level 3) | Money market funds

Assets

Marketable securities

10.0

Significant Unobservable Inputs (Level 3) | Taxable auction rate securities

Assets

Marketable securities

$ 4.2

$ 7.6

[1]	Included in "Prepaid expenses and other current assets" in the accompanying Consolidated Balance Sheets.
[2]	Included in "Other accrued liabilities" in the accompanying Consolidated Balance Sheets.
[3]	Included in "Cash and cash equivalents" in the accompanying Consolidated Balance Sheets.

Reconciliation of the Change in Level 3 Items (Detail) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Jan. 31, 2011

Jan. 31, 2010

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Beginning Balance

$ 17.6

$ 40.9

Transfers into (out of) Level 3

Redemptions

(15.1)

^[1]

(23.3)

^[1]

Total realized/unrealized gains (losses) included in earnings

1.7

Ending Balance

4.2

17.6

Money market funds

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Beginning Balance

10.0

33.3

Transfers into (out of) Level 3

Redemptions

(11.7)

^[1]

(23.3)

^[1]

Total realized/unrealized gains (losses) included in earnings

1.7

Ending Balance

10.0

Taxable auction rate securities

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Beginning Balance

7.6

Transfers into (out of) Level 3

Redemptions

(3.4)

^[1]

Ending Balance

$ 4.2

$ 7.6

[1]	The redemptions of $10.0 million and $23.3 million for fiscal years ended January 31, 2011 and 2010, respectively, are from the International Fund.

Employee and Director Stock Plans - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2011 Year	Jan. 31, 2010	Jan. 31, 2009
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Total compensation costs related to non-vested options	$ 59.2
Total compensation costs related to non-vested options, expected to be recognized over a weighted average period (in years)	1.9
Restricted stock granted under the 2008 Plan	628,000
Weighted average grant date fair value	$ 9.30	$ 6.13	$ 9.82
Number of restricted stock granted but unreleased	1,427,000	855,000
Employee Stock Plan, 2008 Plan
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Maximum vesting period of options and restricted stock granted (in years)	4
Shares of common stock reserved for issuance	15,500,000
Remaining shares available for future issuance prior to amendment	500,000
Shares available for future issuance	15,100,000
Employee Stock Plan, 2008 Plan \| Minimum
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Option expiration term (in years)	4
Employee Stock Plan, 2008 Plan \| Maximum
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Option expiration term (in years)	10
Employee Stock Plan, 2008 Plan \| Restricted Stock and Restricted Stock Units
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Shares of common stock reserved for issuance	2,500,000
Employee Stock Plan, 2008 Plan \| Restricted Stock Units
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Restricted stock granted under the 2008 Plan	605,000
Compensation expense	8.9	1.9
Total compensation cost related to non-vested awards not yet recognized	22.5
Total compensation cost related to non-vested awards not yet recognized, weighted average period of recognition (in years)	1.3
Number of restricted stock granted but unreleased	1,404,000
Outside Directors Option Plan, 2010 Plan
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Minimum vesting period of options and restricted stock granted (in years)	1
Maximum vesting period of options and restricted stock granted (in years)	4
Option expiration term (in years)	7
Shares of common stock reserved for issuance	2,500,000
Remaining shares available from 2000 Plan for future issuance prior to expiration	500,000
Shares available for future issuance	2,800,000
Outside Directors Option Plan, 2010 Plan \| Restricted Stock Awards
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Restricted stock granted under the 2008 Plan	23,000
Compensation expense	0.7	0.7
Total compensation cost related to non-vested awards not yet recognized	0.2
Total compensation cost related to non-vested awards not yet recognized, weighted average period of recognition (in years)	0.4
Number of restricted stock granted but unreleased	23,000
ESP Plan
Compensation Related Costs Share Based Payments Disclosure [Line Items]
Percentage of compensation that eligible employees can use to purchase common stock, maximum	15.00%
Percentage of fair market value eligible employees can purchase common stock, minimum	85.00%
Shares available for future issuance	27,800,000
Description of increases of shares available for future issuance	automatically increases on the first trading day of each fiscal year by an amount equal to the lesser of 10.0 million shares or 2.0% of the total of (1) outstanding shares plus (2) any shares repurchased by Autodesk during the prior fiscal year
Shares issued under the ESP Plan	3,200,000	3,100,000	2,100,000
Shares issued under the ESP Plan, average price	$ 14.77	$ 14.41	$ 27.32
Weighted average grant date fair value	$ 7.22	$ 7.19	$ 10.40
Compensation expense	$ 18.2	$ 26.6	$ 23.1

Summary of Stock Option Activity (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2011
Number of Shares
Options outstanding at January 31, 2010	29.1
Granted	6.7
Exercised	(3.9)
Cancelled	(1.5)
Options outstanding at January 31, 2011	30.4
Options exercisable at January 31, 2011	17.6
Options available for grant at January 31, 2011	17.9
Weighted average price per share
Options outstanding at January 31, 2010	$ 27.56
Granted	$ 29.71
Exercised	$ 18.92
Cancelled	$ 32.06
Options outstanding at January 31, 2011	$ 28.93
Options exercisable at January 31, 2011	$ 31.26

Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted (Detail) (USD $)	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax intrinsic value of options exercised	$ 61.9	$ 18.8	$ 46.7
Weighted average grant date fair value per share of stock options granted	$ 9.30	$ 6.13	$ 9.82

Options Outstanding and Exercisable (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified

Jan. 31, 2011

Year

Jan. 31, 2010

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Options Exercisable - Number of Shares

17.6

Options Exercisable - Weighted average contractual life (in years)

2,400,000

Options Exercisable - Weighted average exercise price

$ 31.26

Options Exercisable - Aggregate intrinsic value

$ 187.9

^[1]

Options Outstanding - Number of Shares

30.4

29.1

Options Outstanding - Weighted average contractual life (in years)

3,700,000

Options Outstanding - Weighted average exercise price

$ 28.93

$ 27.56

Options Outstanding - Aggregate intrinsic value

$ 380.9

^[1]

Range 1

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Range of per-share exercise prices, Lower Limit

$ 0.61

Range of per-share exercise prices, Upper Limit

$ 16.53

Options Exercisable - Number of Shares

3.5

Options Exercisable - Weighted average exercise price

$ 11.30

Options Outstanding - Number of Shares

7.4

Options Outstanding - Weighted average exercise price

$ 13.10

Range 2

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Range of per-share exercise prices, Lower Limit

$ 17.37

Range of per-share exercise prices, Upper Limit

$ 29.49

Options Exercisable - Number of Shares

2.8

Options Exercisable - Weighted average exercise price

$ 23.89

Options Outstanding - Number of Shares

8.3

Options Outstanding - Weighted average exercise price

$ 27.10

Range 3

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Range of per-share exercise prices, Lower Limit

$ 29.50

Range of per-share exercise prices, Upper Limit

$ 35.00

Options Exercisable - Number of Shares

3.2

Options Exercisable - Weighted average exercise price

$ 32.21

Options Outstanding - Number of Shares

6.1

Options Outstanding - Weighted average exercise price

$ 31.77

Range 4

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Range of per-share exercise prices, Lower Limit

$ 35.30

Range of per-share exercise prices, Upper Limit

$ 45.29

Options Exercisable - Number of Shares

7.4

Options Exercisable - Weighted average exercise price

$ 41.53

Options Outstanding - Number of Shares

7.9

Options Outstanding - Weighted average exercise price

$ 41.60

Range 5

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Range of per-share exercise prices, Lower Limit

$ 47.24

Range of per-share exercise prices, Upper Limit

$ 49.80

Options Exercisable - Number of Shares

0.7

Options Exercisable - Weighted average exercise price

$ 48.59

Options Outstanding - Number of Shares

0.7

Options Outstanding - Weighted average exercise price

$ 48.61

[1]	Represents the total pre-tax intrinsic value, based on Autodesk's closing stock price of $40.68 per share as of January 31, 2011, which would have been received by the option holders had all option holders exercised their options as of that date.

Summary of Restricted Stock Award and Restricted Stock Unit Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2011
Non-vested stock
Unreleased restricted stock at January 31, 2010	855
Awarded	628
Released	(30)
Forfeited	(26)
Unreleased restricted stock at January 31, 2011	1,427
Weighted average grant date fair value
Unreleased restricted stock at January 31, 2010	$ 24.77
Awarded	$ 37.48
Released	$ 22.46
Forfeited	$ 24.17
Unreleased restricted stock at January 31, 2011	$ 30.43

Number of Outstanding Options Granted to Employees and Directors (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified

Jan. 31, 2011

Jan. 31, 2010

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Weighted-average exercise price of outstanding options

$ 28.93

$ 27.56

Equity Compensation Plans Approved by Security Holders

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Number of securities to be issued upon exercise of outstanding options

31.1

Weighted-average exercise price of outstanding options

$ 28.06

Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))

45.7

^[1]

Equity Compensation Plans Not Approved by Security Holders

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Number of securities to be issued upon exercise of outstanding options

0.7

^[2]

Weighted-average exercise price of outstanding options

$ 10.39

^[2]

Equity Compensation Plans

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Number of securities to be issued upon exercise of outstanding options

31.8

Weighted-average exercise price of outstanding options

$ 27.65

Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))

45.7

[1]	Included in this amount are 27.8 million securities available for future issuance under Autodesk's ESP Plan.
[2]	Amounts correspond to Autodesk's Nonstatutory Stock Option Plan, which was terminated by the Board of Directors in December 2004.

Provision for Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2010	Oct. 31, 2009	Jul. 31, 2009	Apr. 30, 2009	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Reconciliation of Provision of Income Taxes [Line Items]
Federal Current									$ 16.0	$ 12.3	$ 20.9
Federal Deferred									(8.2)	(33.0)	0.7
State Current									(1.5)	3.0	5.9
State Deferred									7.4	7.1	(0.7)
Foreign Current									48.4	34.1	54.2
Foreign Deferred									(2.1)	3.2	(12.1)
Provision for income taxes	$ 11.4	$ 18.1	$ 20.0	$ 10.5	$ 8.6	$ 2.5	$ 2.9	$ 12.7	$ 60.0	$ 26.7	$ 68.9

Income Taxes - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009	Jan. 31, 2008
Income Taxes [Line Items]
Unrecorded excess stock option tax benefits	$ 160.6
Foreign pretax income	321.1	253.9	298.5
Unremitted earnings of foreign subsidiaries, cumulative	1,030.5
Net unrecognized deferred tax liability on unremitted earnings of Autodesk's foreign subsidiaries	314.5
Noncurrent deferred tax assets	147.5	146.1
Gross unrecognized tax benefits	188.4	178.2	169.4	152.4
Amount of gross unrecognized tax benefits that would impact the effective tax rate, if recognized	175.0
Income tax expense recognized related to change in the expected future tax rate	0.3	0.6	1.4
Tax benefit from closure of income tax audits and decreases in uncertain tax positions	2.8	2.5	6.2
Interest related to income tax matters in income tax expense, net of tax benefit, accrued for interest	1.9	2.2	2.4
Penalties related to unrecognized tax benefits	0	0	0
Valuation Allowance of Deferred Tax Assets California
Income Taxes [Line Items]
Increase in valuation allowance	3.9	14.3
Establishment of valuation allowance	4.9	20.2
Valuation Allowance of Deferred Tax Assets Canada
Income Taxes [Line Items]
Increase in valuation allowance			8.5
Expected Future Tax Rate
Income Taxes [Line Items]
Income tax expense recognized related to change in the expected future tax rate	2.1	17.7
Federal
Income Taxes [Line Items]
Cumulative tax loss carryforwards	16.9
Federal \| Minimum
Income Taxes [Line Items]
Expiration date for tax loss carryforward	2012
Expiration date for tax credit carryforward	2012
Federal \| Maximum
Income Taxes [Line Items]
Expiration date for tax loss carryforward	2021
Expiration date for tax credit carryforward	2031
State
Income Taxes [Line Items]
Cumulative tax loss carryforwards	351.4
State \| Minimum
Income Taxes [Line Items]
Expiration date for tax loss carryforward	2012
State \| Maximum
Income Taxes [Line Items]
Expiration date for tax loss carryforward	2031
Federal Research
Income Taxes [Line Items]
Cumulative tax credit carryforwards	70.4
California State Research
Income Taxes [Line Items]
Cumulative tax credit carryforwards	37.6
Canadian
Income Taxes [Line Items]
Cumulative tax credit carryforwards	47.9
Canadian \| Minimum
Income Taxes [Line Items]
Expiration date for tax credit carryforward	2023
Canadian \| Maximum
Income Taxes [Line Items]
Expiration date for tax credit carryforward	2031
Foreign Country
Income Taxes [Line Items]
Cumulative tax credit carryforwards	119.1
Reduced tax rate expiration date	2019
Income tax benefits attributable to the tax status of certain business and employment actions and capital investments	$ 0	$ 0	$ 0.3
Income tax benefits attributable to the tax status of certain business and employment actions and capital investments, per share			$ 0.001
Open tax year	ranging from fiscal year 2002 to 2011
Foreign Country \| Minimum
Income Taxes [Line Items]
Expiration date for tax credit carryforward	2018
Foreign Country \| Maximum
Income Taxes [Line Items]
Expiration date for tax credit carryforward	2021
Federal and State
Income Taxes [Line Items]
Open tax year	fiscal year 2003 through fiscal year 2011

Differences Between the U.S. Statutory Rate and the Aggregate Income Tax Provision (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2010	Oct. 31, 2009	Jul. 31, 2009	Apr. 30, 2009	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Reconciliation of Statutory Federal Tax Rate [Line Items]
Income tax provision at U.S. Federal statutory rate									$ 95.2	$ 29.7	$ 88.3
State income tax expense (benefit), net of the U.S. Federal benefit									1.4	(0.6)	(1.5)
Foreign income taxed at rates different from the U.S. statutory rate									(39.7)	(22.7)	(55.6)
U.S. valuation allowance									2.8	14.9	(0.2)
Non-deductible stock-based compensation									7.9	11.7	11.8
Research and development tax credit benefit									(5.6)	(4.7)	(6.9)
Tax benefit from closure of income tax audits and decreases in uncertain tax positions									(2.8)	(2.5)	(6.2)
Officer compensation in excess of $1.0 million									0.5	0.3	0.2
Goodwill impairment											30.6
Non-deductible in-process research and development charge											7.0
Other									0.3	0.6	1.4
Provision for income taxes	$ 11.4	$ 18.1	$ 20.0	$ 10.5	$ 8.6	$ 2.5	$ 2.9	$ 12.7	$ 60.0	$ 26.7	$ 68.9

Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Schedule of Deferred Income Tax Assets and Liabilities [Line Items]
Nonqualified stock options	$ 69.0	$ 57.5
Research and development tax credit carryforwards	64.0	55.7
Foreign tax credit carryforwards	16.6	26.8
Accrued compensation and benefits	33.7	25.7
Other accruals not currently deductible for tax	18.7	17.8
Purchased technology and capitalized software	22.8	12.7
Fixed assets	15.1	12.0
Tax loss carryforwards	6.3	11.3
Capitalized research and development expenditures	2.5	3.4
Reserves for product returns and bad debts	2.1	2.1
Other	2.6	2.2
Total deferred tax assets	253.4	227.2
Less: valuation allowance	(42.9)	(39.0)
Net deferred tax assets	210.5	188.2
Tax method change on advanced payments	(9.4)
Unremitted earnings of foreign subsidiaries	(53.6)	(42.1)
Total deferred tax liability	(63.0)	(42.1)
Net deferred tax assets	$ 147.5	$ 146.1

Reconciliation of the Beginning and Ending Amount of the Gross Unrecognized Tax Benefits (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Gross unrecognized tax benefits at the beginning of the fiscal year	$ 178.2	$ 169.4	$ 152.4
Increases for tax positions of prior years	2.0	3.1	1.2
Decreases for tax positions of prior years	(3.5)	(1.9)	(7.0)
Increases for tax positions related to the current year	13.9	11.1	25.8
Decreases for lapse of statute of limitations/audit settlements	(2.2)	(3.5)	(3.0)
Gross unrecognized tax benefits at the end of the fiscal year	$ 188.4	$ 178.2	$ 169.4

Deferred Compensation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Marketable securities	$ 391.8
Deferred compensation liability	31.3	26.3
Deferred compensation liability current	3.4	1.1
Deferred compensation liability non-current	27.9	25.2
Rabbi Trust
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Marketable securities	$ 31.3	$ 26.3

Borrowing Arrangements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010
Debt Disclosure [Line Items]
Line of credit facility, maximum borrowing capacity	$ 250.0
Domestic Line of Credit
Debt Disclosure [Line Items]
Line of credit facility, maximum borrowing capacity	250.0
Line of credit facility, outstanding borrowings	0	0
Line of credit facility, expiration	August 2012
Foreign Line of Credit
Debt Disclosure [Line Items]
Line of credit facility, outstanding borrowings		0
Foreign Line of Credit \| Cancelled
Debt Disclosure [Line Items]
Line of credit facility, maximum borrowing capacity	$ 5.0

Future Minimum Lease Payments (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011
Schedule of Operating Leases [Line Items]
2012	$ 52.7
2013	44.0
2014	34.6
2015	26.4
2016	21.1
Thereafter	54.1
Operating Leases, Future Minimum Payments Due, Total	232.9
Less: Sublease income	4.2
Operating Leases Future Minimum Payments Due Net, Total	$ 228.7

Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Commitments and Contingencies Disclosure [Line Items]
Total non-cancellable purchase commitments	$ 73.3
Total non-cancellable purchase commitments, term	for periods through fiscal 2015
Royalty expense recorded under cost of license and other revenue	12.8	16.5	17.1
Outsource Application Hosting Services Agreement Five Year Contract
Commitments and Contingencies Disclosure [Line Items]
Total non-cancellable purchase commitments, termination fee	$ 9.8

Stockholders' Equity - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Stockholders Equity Note [Line Items]
Preferred stock, shares authorized	2.0	2.0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Repurchased shares of its common stock on the open market, value	$ 280.3	$ 63.2	$ 256.6
Common Stock Repurchase Program
Stockholders Equity Note [Line Items]
Repurchased shares of its common stock on the open market, average repurchase price per share	$ 31.13	$ 23.63	$ 32.06
Common Stock shares remained available for repurchase under repurchase plans	24.5
Common stock and additional paid-in capital
Stockholders Equity Note [Line Items]
Repurchase and retirement of common shares (in shares)	(9.0)	(2.7)	(8.0)
Repurchased shares of its common stock on the open market, value	138.3	36.4	96.1
Retained earnings
Stockholders Equity Note [Line Items]
Repurchased shares of its common stock on the open market, value	$ 142.0	$ 26.8	$ 160.5

Interest and Other Income, Net (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Component of Other Income, Nonoperating [Line Items]
Interest and investment income, net	$ 10.9	$ 10.0	$ 13.6
Investment impairment			(5.9)
Gain (loss) on foreign currency	(14.0)	5.0	(1.0)
Other Income	3.7	4.1	1.3
Interest and other income, net	$ 0.6	$ 19.1	$ 8.0

Accumulated Other Comprehensive Income (Loss), Net of Taxes (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gain (loss) on derivative instruments	$ (0.8)	$ 2.3	$ (0.2)
Net unrealized gain on available-for-sale securities	2.4	1.5
Unfunded portion of pension plans	(9.8)	(5.9)
Foreign currency translation adjustments	7.6	(1.4)	(11.0)
Accumulated other comprehensive income (loss)	$ (0.6)	$ (3.5)	$ (11.2)

Computation of the Numerators and Denominators Used in the Basic and Diluted Net Income Per Share Amounts (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2010	Oct. 31, 2009	Jul. 31, 2009	Apr. 30, 2009	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Numerator:
Net income	$ 61.6	$ 53.6	$ 59.9	$ 36.9	$ 50.1	$ 29.5	$ 10.5	$ (32.1)	$ 212.0	$ 58.0	$ 183.6
Denominator:
Denominator for basic net income per share-weighted average shares									227.6	228.7	225.5
Effect of dilutive securities									6.6	3.4	4.6
Denominator for dilutive net income per share									234.2	232.1	230.1
Basic net income per share	$ 0.27	$ 0.24	$ 0.26	$ 0.16	$ 0.22	$ 0.13	$ 0.05	$ (0.14)	$ 0.93	$ 0.25	$ 0.81
Diluted net income per share	$ 0.26	$ 0.23	$ 0.25	$ 0.16	$ 0.21	$ 0.13	$ 0.05	$ (0.14)	$ 0.90	$ 0.25	$ 0.80

- Definition

The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

+ References+ Details

Information Concerning the Operations of Reportable Segments (Detail) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Jan. 31, 2011

Oct. 31, 2010

Jul. 31, 2010

Apr. 30, 2010

Jan. 31, 2010

Oct. 31, 2009

Jul. 31, 2009

Apr. 30, 2009

Jan. 31, 2011

Jan. 31, 2010

Jan. 31, 2009

Segment Reporting Information [Line Items]

Net revenue

$ 527.7

$ 476.7

$ 472.8

$ 474.6

$ 456.1

$ 416.9

$ 414.9

$ 425.8

$ 1,951.8

$ 1,713.7

$ 2,315.2

Gross profit

479.3

428.2

424.4

423.3

411.7

371.9

364.8

373.5

1,755.2

1,521.9

2,096.1

Depreciation and amortization

105.4

111.5

92.4

Platform Solutions and Emerging Business

Segment Reporting Information [Line Items]

Net revenue

716.2

624.0

900.8

Gross profit

678.9

589.7

860.7

Depreciation and amortization

3.0

3.1

2.4

Architecture, Engineering and Construction

Segment Reporting Information [Line Items]

Net revenue

568.0

513.3

641.4

Gross profit

517.6

465.2

592.7

Depreciation and amortization

1.6

1.8

2.1

Manufacturing

Segment Reporting Information [Line Items]

Net revenue

470.0

386.9

488.4

Gross profit

439.5

358.4

456.9

Depreciation and amortization

2.3

2.5

2.6

Media and Entertainment

Segment Reporting Information [Line Items]

Net revenue

197.6

189.1

262.1

Gross profit

153.9

144.4

197.6

Depreciation and amortization

1.1

1.8

2.5

Other

Segment Reporting Information [Line Items]

Net revenue

0.4

^[1]

22.5

^[1]

Unallocated

Segment Reporting Information [Line Items]

Gross profit

(34.7)

^[2]

(35.8)

^[2]

(11.8)

^[2]

Depreciation and amortization

$ 97.4

$ 102.3

$ 82.8

[1]	Other primarily consisted of revenue from Autodesk's Location Services division, which Autodesk disposed of in February 2009.
[2]	Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including stock-based compensation expense.

Information Regarding Operations by Geographic Area (Detail) (USD $)
In Millions, unless otherwise specified

3 Months Ended

12 Months Ended

Jan. 31, 2011

Oct. 31, 2010

Jul. 31, 2010

Apr. 30, 2010

Jan. 31, 2010

Oct. 31, 2009

Jul. 31, 2009

Apr. 30, 2009

Jan. 31, 2011

Jan. 31, 2010

Jan. 31, 2009

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

$ 527.7

$ 476.7

$ 472.8

$ 474.6

$ 456.1

$ 416.9

$ 414.9

$ 425.8

$ 1,951.8

$ 1,713.7

$ 2,315.2

Long-lived assets

790.0

^[1]

840.1

^[1]

790.0

^[1]

840.1

^[1]

Americas

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

701.5

654.4

782.3

Long-lived assets

636.8

690.2

636.8

690.2

Americas | United States

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

561.6

527.5

646.4

Long-lived assets

571.2

611.3

571.2

611.3

Americas | Other Americas

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

139.9

126.9

135.9

Long-lived assets

65.6

78.9

65.6

78.9

Europe, Middle East and Africa

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

782.8

671.1

1,003.4

Long-lived assets

111.3

106.2

111.3

106.2

Europe, Middle East and Africa | Switzerland

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Long-lived assets

42.8

49.3

42.8

49.3

Europe, Middle East and Africa | Other Europe, Middle East and Africa

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Long-lived assets

68.5

56.9

68.5

56.9

Asia Pacific

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

467.5

388.2

529.5

Long-lived assets

41.9

43.7

41.9

43.7

Asia Pacific | Japan

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

200.6

171.1

213.2

Asia Pacific | Other Asia Pacific

Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Individual Foreign Countries [Line Items]

Net revenue

$ 266.9

$ 217.1

$ 316.3

[1]	Long-lived assets exclude investments in subsidiaries, deferred tax assets and marketable securities.

Business Combinations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Business Acquisition [Line Items]
Business acquisition, number of entities acquired	2
Business acquisition, total consideration	$ 13.5
Plan Platform Ltd
Business Acquisition [Line Items]
Business acquisition, in-process research and development	1.3	1.3
Goodwill		$ 14.1

Allocation of the Purchase Price Consideration, Based on a Valuation of the Acquired Assets and Liabilities for PlanPlatform (Detail) (Plan Platform Ltd, USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
Plan Platform Ltd
Schedule of Business Acquisitions, Purchase Price Allocation [Line Items]
In-process research and development	$ 1.3	$ 1.3
Goodwill		14.1
Net tangible assets		2.6
Business Acquisition, Purchase Price Allocation, Assets Acquired, Total		$ 18.0

Retirement Benefit Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Foreign Pension Plans, Defined Benefit
Pension and Other Postretirement Benefits Disclosure [Line Items]
Net liability related to the funded status of defined benefit pension plans	$ (18.2)	$ (12.5)
Defined benefit pension plans, projected benefit obligation	47.3	36.2
Defined benefit pension plans, fair value of plan assets	29.1	23.7
Contributions to defined benefit pension plans	3.5	3.4	3.2
Defined benefit pension plans, estimated future benefit payments from fiscal 2012 through 2016	10.6
Defined benefit pension plans, estimated future benefit payments from fiscal 2017 through 2021	9.8
Unfunded Defined Benefit Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Unrealized changes in the unfunded portion of defined benefit plans	9.8	5.9
Defined Contribution Plan - Savings
Pension and Other Postretirement Benefits Disclosure [Line Items]
Company's contribution to plan	6.7	7.1	7.8
Foreign Pension Plans Defined Contribution
Pension and Other Postretirement Benefits Disclosure [Line Items]
Company's contribution to plan	$ 13.6	$ 13.4	$ 12.0
Maximum \| Defined Contribution Plan - Savings
Pension and Other Postretirement Benefits Disclosure [Line Items]
Maximum pretax employee contribution to 401(k)	50.00%

Restructuring Reserves - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended							12 Months Ended						3 Months Ended
	Jan. 31, 2011	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2010	Oct. 31, 2009	Jul. 31, 2009	Apr. 30, 2009	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009	Jan. 31, 2011 One-time Termination Benefits	Jan. 31, 2010 One-time Termination Benefits	Jan. 31, 2010 One-time Facilities Closing Costs	Apr. 30, 2010 Fiscal 2011 Plan Person	Jul. 31, 2009 Fiscal 2010 Plan Person Entity	Jan. 31, 2009 Fiscal 2009 Plan Entity Person
Restructuring and Related Cost [Line Items]
Restructuring plan														initiated a restructuring plan in order to further reduce operating costs.
Targeted staff reductions														200
Restructuring program, reduced the number of employees															430	700
Leased facilities that were consolidated															32	27
Restructuring and impairment charges	$ 1.8	$ 1.9	$ 7.1	$ 0.4	$ 4.9	$ 26.4	$ 16.5	$ 10.8	$ 48.2	$ 40.2	$ 10.8	$ 24.3	$ 23.9

Restructuring Activities (Detail) (USD $)
In Millions, unless otherwise specified

12 Months Ended

Jan. 31, 2011

Jan. 31, 2010

Jan. 31, 2009

Restructuring Reserve [Line Items]

Beginning Balance

$ 19.4

$ 43.9

Current portion

4.8

^[1]

11.4

^[1]

38.4

^[1]

Additions

13.7

48.9

Non-current portion

3.8

^[1]

8.0

^[1]

5.5

^[1]

Payments

(21.0)

(68.3)

Adjustments

(3.5)

^[2]

(5.1)

^[2]

Total

8.6

19.4

Ending Balance

8.6

19.4

Fiscal 2011 Plan | Employee Termination Costs

Restructuring Reserve [Line Items]

Additions

12.4

Payments

(10.6)

Adjustments

(0.3)

^[2]

Total

1.5

Ending Balance

1.5

Fiscal 2010 Plan | Employee Termination Costs

Restructuring Reserve [Line Items]

Beginning Balance

0.8

Additions

20.0

Payments

(0.8)

(18.2)

Adjustments

(1.0)

^[2]

Total

0.8

Ending Balance

0.8

Fiscal 2010 Plan | Lease Termination and Asset Costs

Restructuring Reserve [Line Items]

Beginning Balance

6.1

Additions

0.3

9.9

Payments

(4.3)

(3.4)

Adjustments

(0.4)

^[2]

(0.4)

^[2]

Total

1.7

6.1

Ending Balance

1.7

6.1

Fiscal 2009 Plan | Employee Termination Costs

Restructuring Reserve [Line Items]

Beginning Balance

1.0

35.4

Additions

5.8

Payments

(0.2)

(37.8)

Adjustments

(0.8)

^[2]

(2.4)

^[2]

Total

1.0

Ending Balance

1.0

Fiscal 2009 Plan | Lease Termination and Asset Costs

Restructuring Reserve [Line Items]

Beginning Balance

8.2

2.8

Additions

1.0

12.2

Payments

(4.6)

(6.7)

Adjustments

(1.8)

^[2]

(0.1)

^[2]

Total

2.8

8.2

Ending Balance

2.8

8.2

Other | Employee Termination Costs

Restructuring Reserve [Line Items]

Beginning Balance

0.4

0.9

Additions

0.3

Payments

(0.3)

(0.4)

Adjustments

(0.1)

^[2]

(0.4)

^[2]

Total

0.4

Ending Balance

0.4

Other | Lease Termination and Asset Costs

Restructuring Reserve [Line Items]

Beginning Balance

2.9

4.8

Additions

0.7

Payments

(0.2)

(1.8)

Adjustments

(0.1)

^[2]

(0.8)

^[2]

Total

2.6

2.9

Ending Balance

$ 2.6

$ 2.9

[1]	The current and non-current portions of the reserve are recorded in the Consolidated Balance Sheets under "Other accrued liabilities" and "Other liabilities," respectively.
[2]	Adjustments include the impact of foreign currency translation.

Quarterly Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2010	Oct. 31, 2009	Jul. 31, 2009	Apr. 30, 2009	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Quarterly Financial Information [Line Items]
Net revenue	$ 527.7	$ 476.7	$ 472.8	$ 474.6	$ 456.1	$ 416.9	$ 414.9	$ 425.8	$ 1,951.8	$ 1,713.7	$ 2,315.2
Gross profit	479.3	428.2	424.4	423.3	411.7	371.9	364.8	373.5	1,755.2	1,521.9	2,096.1
Income (loss) from operations	71.6	69.2	79.8	50.8	56.0	26.3	2.7	(19.4)	271.4	65.6	244.5
Provision for income taxes	(11.4)	(18.1)	(20.0)	(10.5)	(8.6)	(2.5)	(2.9)	(12.7)	(60.0)	(26.7)	(68.9)
Net income	61.6	53.6	59.9	36.9	50.1	29.5	10.5	(32.1)	212.0	58.0	183.6
Basic net income (loss) per share	$ 0.27	$ 0.24	$ 0.26	$ 0.16	$ 0.22	$ 0.13	$ 0.05	$ (0.14)	$ 0.93	$ 0.25	$ 0.81
Diluted net income (loss) per share	$ 0.26	$ 0.23	$ 0.25	$ 0.16	$ 0.21	$ 0.13	$ 0.05	$ (0.14)	$ 0.90	$ 0.25	$ 0.80
Income from operations includes the following items:
Stock-based compensation expense	18.4	17.0	21.0	24.3	18.9	30.3	21.4	23.0	80.7	93.6	89.5
Amortization of acquisition related intangibles	14.3	14.1	13.6	13.9	13.6	15.1	15.0	14.7	55.9	58.4
Restructuring and impairment charges	1.8		1.9	7.1	0.4	4.9	26.4	16.5	10.8	48.2	40.2
Impairment of goodwill								21.0		21.0
Provision for income taxes includes the following item:
Establishment of valuation allowance on deferred tax assets								$ (21.0)		$ (21.0)

Subsequent Events - Additional Information (Detail) (Acquisition, USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011
Scaleform Corporation
Subsequent Event [Line Items]
Event date	Mar. 01, 2011
Event description	On March 1, 2011, Autodesk acquired Scaleform Corporation (“Scaleform”) for approximately $36.0 million.
Event amount	$ 36.0
Blue Ridge Numerics, Inc
Subsequent Event [Line Items]
Event date	Mar. 10, 2011
Event description	On March 10, 2011, Autodesk acquired Blue Ridge Numerics, Inc (“Blue Ridge”) for approximately $39.0 million, subject to a working capital adjustment.
Event amount	$ 39.0

SCHEDULE II (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2011	Jan. 31, 2010	Jan. 31, 2009
Allowance for doubtful accounts
Balance at Beginning of Year	$ 4.6	$ 8.6	$ 7.8
Additions Charged to Costs and Expenses or Revenues	(0.3)	1.7	5.1
Deductions and Write-Offs	0.1	5.7	4.3
Balance at End of Year	4.2	4.6	8.6
Product returns reserves
Balance at Beginning of Year	11.8	12.5	14.3
Additions Charged to Costs and Expenses or Revenues	38.9	42.9	53.1
Deductions and Write-Offs	40.1	43.6	54.9
Balance at End of Year	10.6	11.8	12.5
Restructuring
Balance at Beginning of Year	19.4	43.9	5.6
Additions Charged to Costs and Expenses or Revenues	13.7	48.9	43.0
Deductions and Write-Offs	24.5	73.4	4.7
Balance at End of Year	$ 8.6	$ 19.4	$ 43.9

Geographical Concentration of Consolidated Cash, Cash Equivalents and Marketable Securities (Detail)	Jan. 31, 2011	Jan. 31, 2010
United States
Concentration Risk [Line Items]
Percentage of consolidated cash, cash equivalents and marketable securities	14.00%	12.00%
Other Americas
Concentration Risk [Line Items]
Percentage of consolidated cash, cash equivalents and marketable securities	1.00%	2.00%
Europe, Middle East and Africa
Concentration Risk [Line Items]
Percentage of consolidated cash, cash equivalents and marketable securities	49.00%	48.00%
Asia Pacific
Concentration Risk [Line Items]
Percentage of consolidated cash, cash equivalents and marketable securities	36.00%	38.00%

Options Outstanding and Exercisable (Parenthetical) (Detail) (USD $)	Jan. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price	$ 40.68

Other Intangible Assets and Related Accumulated Amortization (Parenthetical) (Detail) (In Process Research And Development, USD $) In Millions, unless otherwise specified	Jan. 31, 2011	Jan. 31, 2010
In Process Research And Development
Finite-Lived Intangible Assets [Line Items]
Purchased technologies, in-process research and development technology, indefinite lived	$ 0	$ 4.3
Purchased technologies at cost, in-process research and development, gross	$ 4.3

Effects of Derivative Instruments on Condensed Consolidated Statements of Operations (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized for the fiscal year ended January 31, 2010 due to previously forecasted transactions that did not occur within the originally specified time period or the additional period of time allowed	$ 1.0