Document and Entity Information	9 Months Ended
Document and Entity Information	Oct. 31, 2010	Nov. 30, 2010
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 31, 2010
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Trading Symbol	ADSK
Entity Registrant Name	AUTODESK INC
Entity Central Index Key	0000769397
Current Fiscal Year End Date	--01-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		227,394,939

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Net revenue:
License and other	$ 282.0	$ 236.1	$ 842.5	$ 710.7
Maintenance	194.7	180.8	581.6	546.9
Total net revenue	476.7	416.9	1,424.1	1,257.6
Cost of revenue:
Cost of license and other revenue	40.3	41.7	122.0	130.6
Cost of maintenance revenue	8.2	3.3	26.2	16.8
Total cost of revenue	48.5	45.0	148.2	147.4
Gross profit	428.2	371.9	1,275.9	1,110.2
Operating expenses:
Marketing and sales	185.1	180.3	549.1	540.6
Research and development	122.8	109.3	369.3	340.7
General and administrative	51.1	51.1	148.7	150.6
Restructuring charges		4.9	9.0	47.8
Impairment of goodwill				21.0
Total operating expenses	359.0	345.6	1,076.1	1,100.7
Income from operations	69.2	26.3	199.8	9.5
Interest and other income (expense), net	2.5	5.7	(0.8)	16.5
Income before income taxes	71.7	32.0	199.0	26.0
Provision for income taxes	(18.1)	(2.5)	(48.6)	(18.1)
Net income	$ 53.6	$ 29.5	$ 150.4	$ 7.9
Basic net income per share	$ 0.24	$ 0.13	$ 0.66	$ 0.03
Diluted net income per share	$ 0.23	$ 0.13	$ 0.64	$ 0.03
Shares used in computing basic net income per share	226.5	229.6	227.9	228.5
Shares used in computing diluted net income per share	232.4	232.9	233.4	231.1

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Oct. 31, 2010	Jan. 31, 2010
Current assets:
Cash and cash equivalents	$ 904.3	$ 838.7
Marketable securities	232.5	161.9
Accounts receivable, net	240.1	277.4
Deferred income taxes	44.7	44.2
Prepaid expenses and other current assets	49.2	57.4
Total current assets	1,470.8	1,379.6
Marketable securities	199.8	125.6
Computer equipment, software, furniture and leasehold improvements, net	84.8	101.6
Purchased technologies, net	65.3	88.0
Goodwill	549.7	542.9
Deferred income taxes, net	107.7	101.9
Other assets	103.0	107.6
Assets, Total	2,581.1	2,447.2
Current liabilities:
Accounts payable	86.1	67.8
Accrued compensation	131.4	115.6
Accrued income taxes	28.3	8.4
Deferred revenue	430.0	444.6
Other accrued liabilities	58.9	67.6
Total current liabilities	734.7	704.0
Deferred revenue	77.1	71.9
Long term income taxes payable	139.2	127.2
Other liabilities	74.0	70.6
Commitments and contingencies
Stockholders' equity:
Preferred stock
Common stock and additional paid-in capital	1,242.1	1,204.3
Accumulated other comprehensive income (loss)	(4.0)	(3.5)
Retained earnings	318.0	272.7
Total stockholders' equity	1,556.1	1,473.5
Liabilities and Stockholders' Equity, Total	$ 2,581.1	$ 2,447.2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009
Operating activities:
Net income	$ 150.4	$ 7.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	79.6	84.4
Stock-based compensation expense	62.3	74.7
Restructuring charges, net	9.0	47.8
Impairment of goodwill		21.0
Gain on disposition of assets		(2.3)
Changes in operating assets and liabilities, net of business combinations	63.6	(112.3)
Net cash provided by operating activities	364.9	121.2
Investing activities:
Purchases of marketable securities	(425.8)	(409.9)
Sales of marketable securities	85.9	8.1
Maturities of marketable securities	201.3	126.5
Capital expenditures	(18.1)	(30.2)
Purchase of equity investment	(3.5)	(10.0)
Business combinations, net of cash acquired	(8.5)	(3.6)
Other investing activities	(0.5)
Net cash used in investing activities	(169.2)	(319.1)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	76.4	67.5
Repurchases of common stock	(204.1)	(39.4)
Draws on line of credit		2.2
Repayments of line of credit		(54.3)
Net cash used in financing activities	(127.7)	(24.0)
Effect of exchange rate changes on cash and cash equivalents	(2.4)	2.8
Net increase (decrease) in cash and cash equivalents	65.6	(219.1)
Cash and cash equivalents at beginning of fiscal year	838.7	917.6
Cash and cash equivalents at end of period	$ 904.3	$ 698.5

Basis of Presentation

9 Months Ended

Oct. 31, 2010

Basis of Presentation

1.	*Basis of Presentation*

The accompanying unaudited Condensed Consolidated Financial Statements of Autodesk, Inc. (“Autodesk” or the “Company”) as of October 31, 2010, and for the three and nine months ended October 31, 2010, have been prepared in accordance with accounting principles generally accepted in the U.S. for interim financial information along with the instructions to Form 10-Q and Article 10 of Securities and Exchange Commission (“SEC”) Regulation S-X. Accordingly, they do not include all of the information and notes required by generally accepted accounting principles (“GAAP”) for annual financial statements. In management’s opinion, Autodesk has made all adjustments (consisting of normal, recurring and non-recurring adjustments) during the quarter that were considered necessary for the fair presentation of the financial position and operating results of the Company. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect reported amounts in the financial statements and accompanying notes. Actual results could differ from those estimates. In addition, the results of operations for the three and nine months ended October 31, 2010 are not necessarily indicative of the results for the entire fiscal year ending January 31, 2011, or for any other period. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and related notes, together with management’s discussion and analysis of financial position and results of operations contained in Autodesk’s Annual Report on Form 10-K for the fiscal year ended January 31, 2010 (the “2010 Form 10-K”) filed on March 19, 2010.

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 Condensed Consolidated Statement of Operations for the three and nine months ended October 31, 2009 to conform to the current period presentation as follows:


Increase (Decrease) to Expense	Three Months Ended October 31, 2009			Nine Months Ended October 31, 2009
Cost of license and other revenue		(0.3	)		(8.0	)
Cost of maintenance revenue		0.3			8.0

- Definition

Description containing the entire organization, consolidation and basis of presentation of financial statements disclosure. May be provided in more than one note to the financial statements, as long as users are provided with an understanding of (1) the significant judgments and assumptions made by an enterprise in determining whether it must consolidate a VIE and/or disclose information about its involvement with a VIE, (2) the nature of restrictions on a consolidated VIE's assets reported by an enterprise in its statement of financial position, including the carrying amounts of such assets, (3) the nature of, and changes in, the risks associated with an enterprise's involvement with the VIE, and (4) how an enterprise's involvement with the VIE affects the enterprise's financial position, financial performance, and cash flows. Describes procedure if disclosures are provided in more than one note to the financial statements.

+ References+ Details

Recently Issued Accounting Standards

9 Months Ended

Oct. 31, 2010

Recently Issued Accounting Standards

2.	*Recently Issued Accounting Standards*

With the exception of those discussed below, there have been no recent accounting pronouncements or changes in accounting pronouncements during the nine months ended October 31, 2010, as compared to the accounting pronouncements described in Autodesk’s Annual Report on Form 10-K for the fiscal year ended January 31, 2010, that are of significance, or potential significance, to the Company.

Recently Issued Accounting Standards

In October 2009, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2009-13 regarding Accounting Standards Codification (“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 currently plans to adopt the changes under ASU 2009-13 and 2009-14 effective February 1, 2011. Autodesk is currently assessing the impact that the adoption of these new accounting pronouncements will have on its consolidated financial position, results of operations and 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 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 financial position, results of operations or cash flows.

Concentration of Credit Risks and Significant Customers

9 Months Ended

Oct. 31, 2010

Concentration of Credit Risks and Significant Customers

3.	*Concentration of Credit Risks and Significant Customers*

It is Autodesk’s policy that its cash, cash equivalents and marketable securities are held with, and in the custody of, financial institutions with high credit standing. Autodesk’s cash and cash equivalents are held by diversified institutions globally. Autodesk’s primary commercial banking relationship is with Citibank and its global affiliates (“Citibank”). In addition, Citicorp USA, Inc., an affiliate of Citibank, is the lead lender and agent in the syndicate of the Company’s $250.0 million U.S. line of credit. It is Autodesk’s policy to limit the amounts invested with any one institution by type of security and issuer.

Total sales to the distributors Tech Data Corporation and its global affiliates (“Tech Data”) accounted for 15% and 16% of Autodesk’s consolidated net revenue for the three and nine months ended October 31, 2010, respectively, and 14% and 13% of Autodesk’s consolidated net revenue for the three and nine months ended October 31, 2009, respectively. The majority of the net revenue from sales to Tech Data relates to Autodesk’s Platform Solutions and Emerging Business segment and comes from outside the U.S. In addition, Tech Data accounted for 16% and 15% of gross accounts receivable at October 31, 2010 and January 31, 2010, respectively. Autodesk’s 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.

Financial Instruments and Hedging Activities

9 Months Ended

Oct. 31, 2010

Financial Instruments and Hedging Activities

4.	*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 were as follows:


	October 31, 2010					January 31, 2010
	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Cash and cash equivalents	$	904.3	$	904.3		$	838.7	$	838.7
Marketable securities - short-term		231.9		232.5			164.8		161.9
Marketable securities - long-term		196.8		199.8			124.4		125.6
Foreign currency forward and option contracts		2.9		(2.7	)		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.

Autodesk has marketable securities that are classified as either “available-for-sale securities” or “trading securities.” At October 31, 2010 and January 31, 2010, Autodesk’s short-term investment portfolio included $30.6 million and $26.3 million, respectively, of “trading securities” invested in a defined set of mutual funds as directed by the participants in the Company’s Deferred Compensation Plan. At October 31, 2010, these securities had net unrealized gains of $0.4 million and a cost basis of $30.2 million, and at January 31, 2010, these securities had net unrealized losses of $3.1 million and a cost basis of $29.4 million (see Note 8, “Deferred Compensation”).

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


	October 31, 2010
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Short-term available-for-sale securities:
Commercial paper and corporate securities	$	77.0	$	0.1	$	—	$	77.1
U.S. government agency securities		47.3		0.1		—		47.4
Certificates of deposit and time deposits		29.7		—		—		29.7
U.S. treasury securities		25.0		—		—		25.0
Money market funds		10.0		—		—		10.0
Sovereign debt		9.1		—		—		9.1
Municipal securities		3.3		—		—		3.3
Other		0.3		—		—		0.3

	$	201.7	$	0.2	$	—	$	201.9

Long-term available-for-sale securities:
Commercial paper and corporate securities	$	162.3	$	2.4	$	—	$	164.7
U.S. government agency securities		12.7		0.3		—		13.0
U.S. treasury securities		6.3		0.1		—		6.4
Taxable auction-rate securities		4.2		—		—		4.2
Municipal securities		7.3		0.1		—		7.4
Sovereign debt		4.0		0.1		—		4.1

	$	196.8	$	3.0	$	—	$	199.8


	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 of “available-for-sale securities” resulted in no gross gains or losses during the three and nine month periods ended October 31, 2010 and 2009. The cost of securities sold is based on the specific identification method.

At October 31, 2010 and 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 appointed supervisor is overseeing, but not managing, the accounting and payment administration of the International Fund. Based on currently available information, Autodesk expects to recover substantially all of its current holdings, net of reserves, from the International Fund within the next 12 months. Accordingly, the International Fund is classified in current “Marketable securities” in the Condensed Consolidated Balance Sheets.

At October 31, 2010 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 3 months ended October 31, 2010 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 28 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 remaining 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 Condensed 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 marketable securities, classified by the contractual maturity date of the security as of October 31, 2010:


	October 31, 2010
	Cost		Fair Value
Due in 1 year	$	201.7	$	201.9
Due in 1 year through 5 years		192.6		195.6
Due in 5 years through 10 years		—		—
Due after 10 years		4.2		4.2

Total	$	398.5	$	401.7

As of October 31, 2010 and January 31, 2010, Autodesk did not have any securities in a continuous unrealized loss position for greater than 12 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 international business operations. Autodesk’s general practice is to use two types of derivative instruments, option collars and forward contracts, to hedge a majority of transaction exposures denominated in Euros, Japanese yen, Swiss francs, British pounds and Canadian dollars. These instruments have maturities between 1 to 12 months in the future. Autodesk does not enter into any transactions for derivative instruments for trading or speculative purposes.

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. Autodesk does not have any master netting arrangements in place with collateral features.

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, which are designated and documented as cash flow hedges, qualify for special 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 special 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 Condensed Consolidated Financial Statements at that time.

The notional amount of these contracts was $306.4 million at October 31, 2010 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 $7.7 million remaining in “Accumulated other comprehensive income (loss)” as of October 31, 2010 is expected to be recognized into earnings within the next 12 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 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 (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 notional amounts of foreign currency contracts were $24.9 million at October 31, 2010 and $19.6 million at January 31, 2010.

Fair Value of Derivative Instruments:

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

Fair Value of Derivative Instruments in Condensed Consolidated Balance Sheet as of October 31, 2010 and January 31, 2010


			Fair Value at
	Balance Sheet Location		October 31, 2010		January 31, 2010
Derivative Assets
Foreign currency contracts designated as cash flow hedges		Prepaid expenses and other current assets	$	2.1	$	4.3
Derivatives not designated as hedging instruments				—		—

Total derivative assets			$	2.1	$	4.3

Derivative Liabilities
Foreign currency contracts designated as cash flow hedges		Other accrued liabilities	$	4.8	$	0.4
Derivatives not designated as hedging instruments				—		—

Total derivative liabilities			$	4.8	$	0.4

The effects of derivative instruments on Autodesk’s Condensed Consolidated Statements of Operations were as follows for the three and nine months ended October 31, 2010 and 2009, respectively (amounts presented include any income tax effects).

Effects of Derivative Instruments on Income and Other Comprehensive Income (“OCI”) Derivatives Designated as Hedging Instruments


	Foreign Currency Contracts
	Three Months Ended October 31,						Nine Months Ended October 31,
	2010			2009			2010		2009
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)	$	(10.2	)	$	(5.9	)	$	2.7	$	(8.9	)

Amount and Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
Net revenue	$	2.2		$	(5.2	)	$	11.7	$	(6.4	)
Operating expenses		0.5			1.7			1.0		2.4

Total	$	2.7		$	(3.5	)	$	12.7	$	(4.0	)

Amount and Location of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Interest and other income (expense), net	$	(0.1	)	$	0.1	⁽¹⁾	$	0.1	$	1.7	⁽¹⁾

(1)	Includes $0.1 million loss and $0.9 million gain recognized for the three and nine months ended October 31, 2009, respectively, due to previously forecasted transactions that did not occur within the originally specified time period or the additional period of time allowed.

Derivatives Not Designated as Hedging Instruments


	Foreign Exchange Contracts
	Three Months Ended October 31,					Nine Months Ended October 31,
Amount and Location of Gain (Loss) Recognized in Income on Derivative	2010		2009			2010		2009
Interest and other income (expense), net	$	1.0	$	(0.2	)	$	0.4	$	(1.8	)

- 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

9 Months Ended

Oct. 31, 2010

Fair Value Measurements

5.	*Fair Value Measurements*

On a recurring basis, Autodesk measures certain financial assets and liabilities, which consist of cash equivalents, marketable securities and foreign currency contracts, at fair value. 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 in which there is little or no market data, which requires Autodesk to develop its own assumptions. Whenever possible, Autodesk uses observable market data, and relies on unobservable inputs only when observable market data is not available, when determining fair value. 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 three months ended October 31, 2010.

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 October 31, 2010:


	Fair Value Measurements at October 31, 2010 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Cash equivalents ⁽¹⁾:
Certificates of deposit and time deposits	$	11.1	$	419.6	$	—	$	430.7
Commercial paper		—		235.8		—		235.8
Money market funds		—		45.3		—		45.3
Marketable securities:
Commercial paper and corporate securities		196.8		45.0		—		241.8
U.S. government agency securities		60.4		—		—		60.4
U.S. treasury securities		31.4		—		—		31.4
Certificates of deposit and time deposits		25.0		4.7		—		29.7
Mutual funds		30.6		—		—		30.6
Sovereign debt		—		13.2		—		13.2
Municipal securities		10.7		—		—		10.7
Money market funds		—		—		10.0		10.0
Taxable auction-rate securities		—		—		4.2		4.2
Other		0.3		—		—		0.3
Foreign currency derivative contracts ⁽²⁾		—		2.1		—		2.1

Total	$	366.3	$	765.7	$	14.2	$	1,146.2

Liabilities
Foreign currency derivative contracts ⁽³⁾		—		4.8		—		4.8

Total	$	—	$	4.8	$	—	$	4.8

⁽¹⁾	Included in “Cash and cash equivalents” in the accompanying Condensed Consolidated Balance Sheets.

⁽²⁾	Included in “Prepaid expenses and other current assets” in the accompanying Condensed Consolidated Balance Sheets.

⁽³⁾	Included in “Other accrued liabilities” in the accompanying Condensed 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
	(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
Mutual funds		26.3		—		—		26.3
Certificates of deposit and time deposits		20.0		4.6		—		24.6
U.S. government agency securities		18.0		—		—		18.0
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 Condensed Consolidated Balance Sheets.

⁽²⁾	Included in “Prepaid expenses and other current assets” in the accompanying Condensed Consolidated Balance Sheets.

⁽³⁾	Included in “Other accrued liabilities” in the accompanying Condensed 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 and auction rate securities are designated as a Level 3. The Company conducted its fair value assessment of the International Fund using Level 1 and Level 3 inputs. Management has reviewed the International Fund’s underlying portfolio, which is 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 classify 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 has 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. There have been no significant changes in the valuation input assumptions since January 31, 2010.

A reconciliation of the change in Autodesk’s Level 3 items for the nine months ended October 31, 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, 2010	$	10.0	$	7.6		$	17.6
Transfers into (out of) Level 3		—		—			—
Net purchases (sales) of investments		—		(3.4	)		(3.4	)
Total realized/unrealized gains (losses) included in earnings		—		—			—

Balance at October 31, 2010	$	10.0	$	4.2		$	14.2

- 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

Stock-Based Compensation

9 Months Ended

Oct. 31, 2010

Stock-Based Compensation

6.	*Stock-Based Compensation*

Stock Plans

As of October 31, 2010, Autodesk maintained two active stock plans for the purpose of granting stock 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 approved by Autodesk’s stockholders in November 2007 and was amended by the stockholders on June 10, 2010. As amended, the 2008 Plan has reserved 16.0 million shares of Autodesk common stock for issuance and will expire in 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 and 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 October 31, 2010, 15.9 million shares were available for future issuance under the 2008 Plan.

The 2010 Plan, which was approved by the stockholders and replaced the 2000 Directors’ Option Plan (“2000 Plan”) in June 2009, 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 3.0 million shares of Autodesk common stock. At October 31, 2010, 2.8 million shares were available for future issuance. The 2010 Plan will expire in March 2020.

At October 31, 2010, a total of 46.4 million shares of Autodesk’s common stock have been reserved for future issuance under existing stock option and stock purchase plans.

The following sections, Stock Options and Restricted Stock, summarize activity under Autodesk’s stock plans.

Stock Options:

A summary of stock option activity for the nine months ended October 31, 2010 was as follows:


	Number of Shares			Weighted Average Price per Share
	(in thousands)
Options outstanding at January 31, 2010		29,083		$	27.56
Granted		6,539			29.46
Exercised		(2,005	)		15.11
Cancelled		(1,141	)		31.69

Options outstanding at October 31, 2010		32,476		$	28.57

Options exercisable at October 31, 2010		19,486		$	30.53

Options available for grant at October 31, 2010		18,669

As of October 31, 2010, the total compensation cost of $68.3 million related to non-vested options is expected to be recognized over a weighted average period of 2.1 years. 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.


	Three Months Ended October 31, 2010		Three Months Ended October 31, 2009
Pre-tax intrinsic value of options exercised	$	15.1	$	2.9
Weighted average grant date fair value per share of stock options granted	$	10.93	$	8.35

	Nine Months Ended October 31, 2010		Nine Months Ended October 31, 2009
Pre-tax intrinsic value of options exercised	$	31.5	$	15.8
Weighted average grant date fair value per share of stock options granted	$	9.19	$	6.12

The following table summarizes information about options outstanding and exercisable at October 31, 2010:


	Options Exercisable								Options Outstanding
	Number of Shares (in Thousands)		Weighted Average Contractual Life (in Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value⁽¹⁾ (in Millions)		Number of Shares (in Thousands)		Weighted Average Contractual Life (in Years)		Weighted Average Exercise Price
Range of per-share exercise prices:
$0.61 — $16.53		4,109			$	11.18				8,040			$	12.91
$17.37 — $29.49		3,348				23.86				8,964				26.83
$29.50 — $34.53		3,620				32.08				6,573				31.74
$35.00 — $45.29		7,707				41.38				8,111				41.52
$47.24 — $49.80		702				48.57				788				48.57

		19,486		2.6	$	30.53	$	159.2		32,476		3.8	$	28.57

⁽¹⁾	Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $36.20 per share as of October 31, 2010, 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 prior to specific dates ranging through June 2017.

Restricted Stock:

A summary of restricted stock award and restricted stock unit activity for the nine months ended October 31, 2010 was as follows:


	Unreleased Restricted Stock
	(in thousands)
Unreleased restricted stock at January 31, 2010		855
Awarded		67
Released		(30	)
Forfeited		(15	)

Unreleased restricted stock at October 31, 2010		877

During the nine months ended October 31, 2010, Autodesk granted approximately 44,000 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 $1.9 million and $5.8 million during the three and nine months ended October 31, 2010, respectively. Autodesk recorded stock-based compensation expense related to restricted stock units of $0.3 million and $0.8 million during the three and nine months ended October 31, 2009, respectively. As of October 31, 2010, total compensation cost related to non-vested awards, not yet recognized of $8.2 million, is expected to be recognized over a weighted average period of 1.1 years. At October 31, 2010, the number of units granted but unreleased was approximately 854,000.

During the nine months ended October 31, 2010, 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 $0.1 million and $0.5 million during the three and nine months ended October 31, 2010, respectively, and $0.2 million and $0.6 million during the three and nine months ended October 31, 2009, respectively. As of October 31, 2010, total compensation cost related to non-vested awards, not yet recognized of $0.3 million, is expected to be recognized over a weighted average period of 0.6 years. At October 31, 2010, the number of awards granted but unreleased was approximately 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 October 31, 2010, 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 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 will expire in January 2018.

Autodesk issued 1.5 million and 3.2 million shares under the ESP Plan during the three and nine months ended October 31, 2010, respectively, at average prices of $14.91 and $14.77 per share, respectively. During the three and nine months ended October 31, 2009, Autodesk issued 1.4 million and 3.1 million shares under the ESP Plan, respectively, at average prices of $14.54 and $14.41 per share, respectively. The weighted average grant date fair values of awards granted under the ESP Plan during the three and nine months ended October 31, 2010, calculated as of the award grant date using the Black-Scholes-Merton option-pricing model, were $7.60 and $7.22 per share, respectively. The weighted average grant date fair values of awards granted under the ESP Plan during the three and nine months ended October 31, 2009, calculated as of the award grant date using the Black-Scholes-Merton option-pricing model, were $8.35 and $7.19 per share, respectively.

Stock-based Compensation Expense

The following table summarizes stock-based compensation expense for the three and nine months ended October 31, 2010 and 2009, respectively, as follows:


	Three Months Ended October 31, 2010			Three Months Ended October 31, 2009
Cost of license and other revenue	$	0.6		$	1.1
Marketing and sales		7.6			13.5
Research and development		5.7			9.5
General and administrative		3.1			6.2

Stock-based compensation expense related to stock awards and ESP Plan purchases		17.0			30.3
Tax benefit		(5.4	)		(9.4	)

Stock-based compensation expense related to stock awards and ESP Plan purchases, net of tax	$	11.6		$	20.9


	Nine Months Ended October 31, 2010			Nine Months Ended October 31, 2009
Cost of license and other revenue	$	2.1		$	2.4
Marketing and sales		27.4			32.5
Research and development		21.2			23.7
General and administrative		11.6			16.1

Stock-based compensation expense related to stock awards and ESP Plan purchases		62.3			74.7
Tax benefit		(17.6	)		(19.4	)

Stock-based compensation expense related to stock awards and ESP Plan purchases, net of tax	$	44.7		$	55.3

Autodesk used the Black-Scholes-Merton option-pricing model to estimate the fair value of stock-based awards and the fair value of awards under the ESP Plan based on the following assumptions:


	Three Months Ended October 31, 2010		Three Months Ended October 31, 2009
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	43 - 44%	39 - 47%	45 - 47%	43 - 55%
Range of expected lives (in years)	3.5 - 4.4	0.5 - 2.0	2.7 - 4.0	0.50 - 2.0
Expected dividends	0%	0%	0%	0%
Range of risk-free interest rates	0.86 -1.19%	0.20 - 0.45%	1.25 - 1.98%	0.20 - 0.98%
Expected forfeitures	10.5%	10.5%	13.5%	13.5%

	Nine Months Ended October 31, 2010		Nine Months Ended October 31, 2009
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	40 - 44%	33 - 47%	45 - 55%	43 - 73%
Range of expected lives (in years)	2.7 - 4.4	0.50 - 2.0	2.7 - 4.0	0.50 - 2.0
Expected dividends	0%	0%	0%	0%
Range of risk-free interest rates	0.86 - 1.85%	0.20 - 1.05%	1.21 - 2.42%	0.20 - 0.98%
Range of expected forfeitures	10.5 - 13.5%	10.5 - 13.5%	13.5%	13.5%

Autodesk measures all stock-based payments to employees and directors, including grants of employee stock options, employee stock purchases related to the ESP Plan, and restricted stock units and restricted stock, using a fair-value based method, and records the expense in Autodesk’s Condensed 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.

Autodesk estimates expected volatility for stock-based awards granted under the Company’s stock plans and ESP Plan awards based on the average of 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 granted under the Company’s stock plans using both exercise behavior and post-vesting termination behavior, as well as consideration of outstanding options.

Autodesk does not currently pay, 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 valuation model.

The risk-free interest rate used in the Black-Scholes-Merton option valuation model for stock-based awards granted under the Company’s stock plans and ESP Plan awards is the current yield at the date of the grant on U.S. Treasury securities with equivalent remaining lives.

Autodesk only recognizes expense 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.

Income Taxes

9 Months Ended

Oct. 31, 2010

Income Taxes

7.	*Income Taxes*

Autodesk’s effective tax rate was 25% and 24% during the three and nine months ended October 31, 2010, respectively. Autodesk’s effective tax rate was 8% and 70% during the three and nine months ended October 31, 2009, respectively. Autodesk’s effective tax rate increased 17 percentage points during the three months ended October 31, 2010 as compared to the same period in the prior fiscal year primarily due to a discrete tax benefit of $4.4 million related to additional stock-based compensation expense recorded during the third quarter of fiscal 2010. Autodesk’s effective tax rate during the nine months ended October 31, 2010 decreased 46 percentage points as compared to the same period in the prior fiscal year primarily due to a $20.9 million discrete non-cash tax charge as a result of a change in expected future tax rates and establishment of a valuation allowance against certain California deferred tax assets recorded during the first quarter of fiscal 2010, partially offset by a discrete tax benefit of $7.7 million associated with the impairment of goodwill recorded during the first quarter of fiscal 2010, and a discrete tax benefit of $4.4 million related to additional stock-based compensation expense recorded during the third quarter of fiscal 2010. During the first quarter of fiscal 2010, the State of California enacted legislation significantly altering California tax law. As a result of the legislation, we expect 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. Excluding the impact of discrete tax items, the effective tax rate for the three and nine months ended October 31, 2010 was lower than the Federal statutory tax rate of 35% primarily due to foreign income taxed at lower rates partially offset by the impact of stock-based compensation expense.

As of October 31, 2010, the Company had $185.8 million of gross unrecognized tax benefits, excluding interest, of which approximately $173.4 million represents the amount of unrecognized tax benefits that would impact the effective tax rate, if recognized. The remaining $12.4 million relates to items that would result in balance sheet reclassification with no impact to income tax expense. 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.

At October 31, 2010, Autodesk had net deferred tax assets of $152.4 million. The Company believes that it will generate sufficient future taxable income in appropriate tax jurisdictions to realize these assets.

Deferred Compensation

9 Months Ended

Oct. 31, 2010

Deferred Compensation

8.	*Deferred Compensation*

At October 31, 2010, Autodesk had marketable securities totaling $432.3 million, of which $30.6 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 $30.6 million at October 31, 2010, of which $1.4 million was classified as current and $29.2 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 Condensed Consolidated Balance Sheets under “Accrued compensation” and “Other liabilities,” respectively.

Computer Equipment, Software, Furniture and Leasehold Improvements, Net

9 Months Ended

Oct. 31, 2010

Computer Equipment, Software, Furniture and Leasehold Improvements, Net

9.	*Computer Equipment, Software, Furniture and Leasehold Improvements, Net*

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


	October 31, 2010			January 31, 2010
Computer software, at cost	$	128.8		$	127.3
Computer hardware, at cost		118.1			108.5
Leasehold improvements, land and buildings, at cost		117.2			113.7
Furniture and equipment, at cost		43.5			42.9

		407.6			392.4
Less: Accumulated depreciation		(322.8	)		(290.8	)

Computer software, hardware, leasehold improvements, furniture and equipment, net	$	84.8		$	101.6

Other Intangible Assets, Net

9 Months Ended

Oct. 31, 2010

Other Intangible Assets, Net

10.

Other Intangible Assets, Net

Other intangible assets include purchased technologies, customer relationships, trade names and the related accumulated amortization were as follows:


	October 31, 2010			January 31, 2010
Purchased technologies, at cost ⁽¹⁾	$	313.1		$	311.5
Customer relationships and trade names, at cost ⁽²⁾		178.6			176.5

		491.7			488.0
Less: Accumulated amortization		(358.2	)		(314.9	)

Other intangible assets, net	$	133.5		$	173.1

⁽¹⁾

Purchased technologies include zero and $4.3 million of in-process research and development technology as of October 31, 2010 and January 31, 2010, respectively. During the quarter ended October 31, 2010, $4.3 million of in-process research and development reached technological feasibility and began being amortized. In-process research and development technology is an indefinite lived asset that is held and tested at least annually for impairment until such time that technological feasibility is achieved. Once technological feasibility is achieved, the technology will be amortized to expense over an applicable useful life.

⁽²⁾	Customer relationships and trade names are included in “Other assets” in the Condensed Consolidated Balance Sheets.

Goodwill

9 Months Ended

Oct. 31, 2010

Goodwill

11.

Goodwill

The changes in the carrying amount of goodwill during the nine months ended October 31, 2010 were as follows:


	Platform Solutions and Emerging Business		Architecture, Engineering and Construction			Manufacturing		Media and Entertainment		Total
Balance as of January 31, 2010	$	40.2	$	224.8		$	277.9	$	—	$	542.9
Addition arising from acquisitions		—		—			—		5.5		5.5
Effect of foreign currency translation, purchase accounting adjustments and other		0.5		(0.5	)		1.3		—		1.3

Balance as of October 31, 2010	$	40.7	$	224.3		$	279.2	$	5.5	$	549.7

Autodesk assesses goodwill annually for impairment in the fourth quarter of each fiscal year or sooner should events or changes in circumstances indicate potential impairment. When assessing goodwill for impairment, Autodesk uses discounted cash flow models that include assumptions regarding projected cash flows (“Income Approach”) and corroborates them 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 operating 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 operating results forecasts. As of October 31, 2010, a hypothetical 10% decrease in the fair value of our 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 impairment, of goodwill for the respective reporting units.

Borrowing Arrangements

9 Months Ended

Oct. 31, 2010

Borrowing Arrangements

12.

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, certain types of additional debt and dispositions of assets if Autodesk fails to maintain its financial covenants. The line of credit is syndicated with various financial institutions, including Citicorp USA, Inc., a Citibank affiliate, which is the lead lender and agent. Autodesk had no outstanding borrowings on this line as of October 31, 2010. This facility expires in August 2012.

Restructuring Reserve

9 Months Ended

Oct. 31, 2010

Restructuring Reserve

13.

Restructuring Reserve

During the first quarter of fiscal 2011, Autodesk initiated a restructuring plan in order to further reduce operating costs. The restructuring plan is expected to result in targeted staff reductions of approximately 210 to 230 positions. In connection with the restructuring plan, Autodesk expects to record restructuring charges of approximately $10.0 million to $12.0 million. No leased facilities were consolidated as part of this restructuring (“Fiscal 2011 Plan”).

In connection with the Fiscal 2011 Plan, during the three and nine months ended October 31, 2010 Autodesk reduced the number of employees by approximately 20 positions and 190 positions, respectively, and recorded restructuring charges of close to zero and $9.0 million, respectively, which primarily related to one-time employee termination benefits. The remainder of the termination benefits will be substantially paid during fiscal 2011. In connection with the fiscal 2009 and 2010 restructuring plans, Autodesk expects to pay the facility related liabilities through fiscal 2018.

The following table summarizes the restructuring activity recorded in the Condensed Consolidated Balance Sheets during the nine months ended October 31, 2010:


	Balance at January 31, 2010		Additions		Payments			Adjustments⁽¹⁾			Balance at October 31, 2010
Fiscal 2011 Plan
Employee Termination Costs	$	—	$	11.1	$	(9.8	)	$	(0.2	)	$	1.1
Fiscal 2010 Plan
Employee Termination Costs		0.8		—		(0.8	)		—			—
Lease Termination and Asset Costs		6.1		0.1		(3.4	)		(0.2	)		2.6
Fiscal 2009 Plan
Employee Termination Costs		1.0		—		(0.2	)		(0.8	)		—
Lease Termination and Asset Costs		8.2		0.2		(3.8	)		(1.5	)		3.1
Other
Employee Termination Costs		0.4		—		(0.3	)		(0.1	)		—
Lease Termination and Asset Costs		2.9		—		(0.7	)		(0.1	)		2.1

	$	19.4	$	11.4	$	(19.0	)	$	(2.9	)	$	8.9

Current portion⁽²⁾	$	11.4									$	5.2
Non-current portion⁽²⁾		8.0										3.7

	$	19.4									$	8.9

⁽¹⁾	Adjustments include the impact of foreign currency translation.

⁽²⁾	The current and non-current portion of the reserve is recorded in the Condensed Consolidated Balance Sheet under “Other accrued liabilities” and “Other liabilities,” respectively.

Commitments and Contingencies

9 Months Ended

Oct. 31, 2010

Commitments and Contingencies

14.

Commitments and Contingencies

Guarantees and 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 Autodesk’s 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, but because potential future costs are highly variable, Autodesk is unable to estimate the maximum potential effect of these indemnifications on its future results of operations.

In connection with the purchase, sale or license transactions of assets or businesses with third parties, Autodesk has received or assumed customary indemnification agreements related to the assets or businesses purchased, sold or licensed. Historically, costs related to indemnifications or guarantees assumed have not been significant, but because potential future costs are highly variable, Autodesk is unable to estimate the maximum potential effect 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 not significant.

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 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.

Common Stock Repurchase Program

9 Months Ended

Oct. 31, 2010

Common Stock Repurchase Program

15.

Common Stock Repurchase Program

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. The number of shares acquired and the timing of the purchases are based on several factors, including general market conditions, the volume of employee stock option exercises and the issuance of shares through the ESP Plan, the pool of existing outstanding options and the grant of new options, the trading price of Autodesk common stock, cash on hand and available in the United States, and company defined trading windows.

During the three and nine months ended October 31, 2010, Autodesk repurchased 2.5 million and 7.0 million respective shares of its common stock on the open market at average repurchase prices of $29.93 per share and $29.13 per share, respectively, and subsequently retired those shares. Common stock and additional paid-in capital and retained earnings were reduced by $35.7 million and $39.2 million, respectively, during the three months ended October 31, 2010, as a result of the stock repurchases. Common stock and additional paid-in-capital and retained earnings were reduced by $99.0 million and $105.1 million, respectively, during the nine months ended October 31, 2010. As of October 31, 2010, 6.5 million shares remained available for repurchase under this program.

Comprehensive Income (Loss)

9 Months Ended

Oct. 31, 2010

Comprehensive Income (Loss)

16.

Comprehensive Income (Loss)

The components of other comprehensive income (loss), net of taxes, were as follows:


	Three Months Ended October 31,						Nine Months Ended October 31,
	2010			2009			2010			2009
Net income	$	53.6		$	29.5		$	150.4		$	7.9
Other comprehensive income (loss)
Net gain (loss) on derivative instruments, net of taxes		(13.0	)		(2.4	)		(10.0	)		(6.3	)
Change in net unrealized gain (loss) on available-for-sale securities, net of tax		0.9			0.9			1.8			1.1
Net change in cumulative foreign currency translation gain (loss)		11.0			6.6			7.7			20.1

Total other comprehensive income (loss)		(1.1	)		5.1			(0.5	)		14.9

Total comprehensive income (loss)	$	52.5		$	34.6		$	149.9		$	22.8

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


	October 31, 2010			January 31, 2010
Net gain (loss) on derivative instruments	$	(7.7	)	$	2.3
Net unrealized gain on available-for-sale securities		3.3			1.5
Unfunded portion of pension plans		(5.9	)		(5.9	)
Foreign currency translation adjustments		6.3			(1.4	)

Accumulated other comprehensive income (loss)	$	(4.0	)	$	(3.5	)

- 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

9 Months Ended

Oct. 31, 2010

Net Income Per Share

17.

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 unvested 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:


	Three Months Ended October 31,				Nine Months Ended October 31,
	2010		2009		2010		2009
Numerator:
Net income	$	53.6	$	29.5	$	150.4	$	7.9

Denominator:
Denominator for basic net income per share - weighted average shares		226.5		229.6		227.9		228.5
Effect of dilutive securities		5.9		3.3		5.5		2.6

Denominator for dilutive net income per share		232.4		232.9		233.4		231.1

Basic net income per share	$	0.24	$	0.13	$	0.66	$	0.03

Diluted net income per share	$	0.23	$	0.13	$	0.64	$	0.03

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 period. For the three months ended October 31, 2010 and 2009, 20.2 million and 17.6 million potentially anti-dilutive weighted shares, respectively, were excluded from the computation of diluted net income per share. For the nine months ended October 31, 2010 and 2009, 19.9 million and 22.3 million potentially anti-dilutive weighted shares were excluded from the computation of diluted net income per share.

Segments

9 Months Ended

Oct. 31, 2010

Segments

18.

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”). 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. The 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 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 (formerly known as Advanced Systems). 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” of our 2010 Form 10-K. 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 11, “Goodwill.”

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


	Three Months Ended October 31,						Nine Months Ended October 31,
	2010			2009			2010			2009
Net revenue:
Platform Solutions and Emerging Business	$	173.3		$	154.3		$	534.6		$	459.6
Architecture, Engineering and Construction		136.4			124.8			406.3			375.9
Manufacturing		116.7			89.7			337.3			279.0
Media and Entertainment		50.3			48.1			145.9			142.7
Other		—			—			—			0.4

	$	476.7		$	416.9		$	1,424.1		$	1,257.6

Gross profit:
Platform Solutions and Emerging Business	$	164.1		$	146.5		$	505.6		$	432.8
Architecture, Engineering and Construction		124.5			113.3			368.8			339.9
Manufacturing		109.7			83.7			314.7			257.4
Media and Entertainment		38.9			38.1			112.6			107.6
Unallocated ⁽¹⁾		(9.0	)		(9.7	)		(25.8	)		(27.5	)

	$	428.2		$	371.9		$	1,275.9		$	1,110.2

⁽¹⁾	Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including amortization of purchased technology and stock-based compensation expense.

Information regarding Autodesk’s net revenue by geographic area was as follows:


	Three Months Ended October 31,				Nine Months Ended October 31,
	2010		2009		2010		2009
Net revenue:
Americas
U.S.	$	142.8	$	131.9	$	409.4	$	394.5
Other Americas		36.5		31.5		99.5		91.8

Total Americas		179.3		163.4		508.9		486.3

Europe, Middle East and Africa		182.9		159.3		570.3		483.4

Asia Pacific
Japan		47.6		39.9		147.8		130.1
Other Asia Pacific		66.9		54.3		197.1		157.8

Total Asia Pacific		114.5		94.2		344.9		287.9

Total net revenue	$	476.7	$	416.9	$	1,424.1	$	1,257.6

Goodwill (Policies)

9 Months Ended

Oct. 31, 2010

Goodwill, Policy

Financial Instruments and Hedging Activities (Tables)

9 Months Ended

Oct. 31, 2010

Cost and Fair Value of Financial Instruments Disclosure

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


	October 31, 2010					January 31, 2010
	Amortized Cost		Fair Value			Amortized Cost		Fair Value
Cash and cash equivalents	$	904.3	$	904.3		$	838.7	$	838.7
Marketable securities - short-term		231.9		232.5			164.8		161.9
Marketable securities - long-term		196.8		199.8			124.4		125.6
Foreign currency forward and option contracts		2.9		(2.7	)		2.3		3.9

Marketable Securities

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


	October 31, 2010
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Short-term available-for-sale securities:
Commercial paper and corporate securities	$	77.0	$	0.1	$	—	$	77.1
U.S. government agency securities		47.3		0.1		—		47.4
Certificates of deposit and time deposits		29.7		—		—		29.7
U.S. treasury securities		25.0		—		—		25.0
Money market funds		10.0		—		—		10.0
Sovereign debt		9.1		—		—		9.1
Municipal securities		3.3		—		—		3.3
Other		0.3		—		—		0.3

	$	201.7	$	0.2	$	—	$	201.9

Long-term available-for-sale securities:
Commercial paper and corporate securities	$	162.3	$	2.4	$	—	$	164.7
U.S. government agency securities		12.7		0.3		—		13.0
U.S. treasury securities		6.3		0.1		—		6.4
Taxable auction-rate securities		4.2		—		—		4.2
Municipal securities		7.3		0.1		—		7.4
Sovereign debt		4.0		0.1		—		4.1

	$	196.8	$	3.0	$	—	$	199.8


	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 marketable securities, classified by the contractual maturity date of the security as of October 31, 2010:


	October 31, 2010
	Cost		Fair Value
Due in 1 year	$	201.7	$	201.9
Due in 1 year through 5 years		192.6		195.6
Due in 5 years through 10 years		—		—
Due after 10 years		4.2		4.2

Total	$	398.5	$	401.7

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

Fair Value of Derivative Instruments in Condensed Consolidated Balance Sheet as of October 31, 2010 and January 31, 2010


			Fair Value at
	Balance Sheet Location		October 31, 2010		January 31, 2010
Derivative Assets
Foreign currency contracts designated as cash flow hedges		Prepaid expenses and other current assets	$	2.1	$	4.3
Derivatives not designated as hedging instruments				—		—

Total derivative assets			$	2.1	$	4.3

Derivative Liabilities
Foreign currency contracts designated as cash flow hedges		Other accrued liabilities	$	4.8	$	0.4
Derivatives not designated as hedging instruments				—		—

Total derivative liabilities			$	4.8	$	0.4

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

Effects of Derivative Instruments on Income and Other Comprehensive Income (“OCI”) Derivatives Designated as Hedging Instruments


	Foreign Currency Contracts
	Three Months Ended October 31,						Nine Months Ended October 31,
	2010			2009			2010		2009
Amount of Gain (Loss) Recognized in Accumulated OCI on Derivatives (Effective Portion)	$	(10.2	)	$	(5.9	)	$	2.7	$	(8.9	)

Amount and Location of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
Net revenue	$	2.2		$	(5.2	)	$	11.7	$	(6.4	)
Operating expenses		0.5			1.7			1.0		2.4

Total	$	2.7		$	(3.5	)	$	12.7	$	(4.0	)

Amount and Location of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)
Interest and other income (expense), net	$	(0.1	)	$	0.1	⁽¹⁾	$	0.1	$	1.7	⁽¹⁾

(1)	Includes $0.1 million loss and $0.9 million gain recognized for the three and nine months ended October 31, 2009, respectively, due to previously forecasted transactions that did not occur within the originally specified time period or the additional period of time allowed.

Derivatives Not Designated as Hedging Instruments


	Foreign Exchange Contracts
	Three Months Ended October 31,					Nine Months Ended October 31,
Amount and Location of Gain (Loss) Recognized in Income on Derivative	2010		2009			2010		2009
Interest and other income (expense), net	$	1.0	$	(0.2	)	$	0.4	$	(1.8	)

- 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)

9 Months Ended

Oct. 31, 2010

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 October 31, 2010:


	Fair Value Measurements at October 31, 2010 Using
	Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	(Level 1)		(Level 2)		(Level 3)		Total
Assets
Cash equivalents ⁽¹⁾:
Certificates of deposit and time deposits	$	11.1	$	419.6	$	—	$	430.7
Commercial paper		—		235.8		—		235.8
Money market funds		—		45.3		—		45.3
Marketable securities:
Commercial paper and corporate securities		196.8		45.0		—		241.8
U.S. government agency securities		60.4		—		—		60.4
U.S. treasury securities		31.4		—		—		31.4
Certificates of deposit and time deposits		25.0		4.7		—		29.7
Mutual funds		30.6		—		—		30.6
Sovereign debt		—		13.2		—		13.2
Municipal securities		10.7		—		—		10.7
Money market funds		—		—		10.0		10.0
Taxable auction-rate securities		—		—		4.2		4.2
Other		0.3		—		—		0.3
Foreign currency derivative contracts ⁽²⁾		—		2.1		—		2.1

Total	$	366.3	$	765.7	$	14.2	$	1,146.2

Liabilities
Foreign currency derivative contracts ⁽³⁾		—		4.8		—		4.8

Total	$	—	$	4.8	$	—	$	4.8

⁽¹⁾	Included in “Cash and cash equivalents” in the accompanying Condensed Consolidated Balance Sheets.

⁽²⁾	Included in “Prepaid expenses and other current assets” in the accompanying Condensed Consolidated Balance Sheets.

⁽³⁾	Included in “Other accrued liabilities” in the accompanying Condensed 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
	(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
Mutual funds		26.3		—		—		26.3
Certificates of deposit and time deposits		20.0		4.6		—		24.6
U.S. government agency securities		18.0		—		—		18.0
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 Condensed Consolidated Balance Sheets.

⁽²⁾	Included in “Prepaid expenses and other current assets” in the accompanying Condensed Consolidated Balance Sheets.

⁽³⁾	Included in “Other accrued liabilities” in the accompanying Condensed 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 nine months ended October 31, 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, 2010	$	10.0	$	7.6		$	17.6
Transfers into (out of) Level 3		—		—			—
Net purchases (sales) of investments		—		(3.4	)		(3.4	)
Total realized/unrealized gains (losses) included in earnings		—		—			—

Balance at October 31, 2010	$	10.0	$	4.2		$	14.2

Stock-Based Compensation (Tables)

9 Months Ended

Oct. 31, 2010

Schedule of Share-based Compensation, Options Activity

A summary of stock option activity for the nine months ended October 31, 2010 was as follows:


	Number of Shares			Weighted Average Price per Share
	(in thousands)
Options outstanding at January 31, 2010		29,083		$	27.56
Granted		6,539			29.46
Exercised		(2,005	)		15.11
Cancelled		(1,141	)		31.69

Options outstanding at October 31, 2010		32,476		$	28.57

Options exercisable at October 31, 2010		19,486		$	30.53

Options available for grant at October 31, 2010		18,669

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.


	Three Months Ended October 31, 2010		Three Months Ended October 31, 2009
Pre-tax intrinsic value of options exercised	$	15.1	$	2.9
Weighted average grant date fair value per share of stock options granted	$	10.93	$	8.35

	Nine Months Ended October 31, 2010		Nine Months Ended October 31, 2009
Pre-tax intrinsic value of options exercised	$	31.5	$	15.8
Weighted average grant date fair value per share of stock options granted	$	9.19	$	6.12

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 October 31, 2010:


	Options Exercisable								Options Outstanding
	Number of Shares (in Thousands)		Weighted Average Contractual Life (in Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value⁽¹⁾ (in Millions)		Number of Shares (in Thousands)		Weighted Average Contractual Life (in Years)		Weighted Average Exercise Price
Range of per-share exercise prices:
$0.61 — $16.53		4,109			$	11.18				8,040			$	12.91
$17.37 — $29.49		3,348				23.86				8,964				26.83
$29.50 — $34.53		3,620				32.08				6,573				31.74
$35.00 — $45.29		7,707				41.38				8,111				41.52
$47.24 — $49.80		702				48.57				788				48.57

		19,486		2.6	$	30.53	$	159.2		32,476		3.8	$	28.57

⁽¹⁾	Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $36.20 per share as of October 31, 2010, which would have been received by the option holders had all option holders exercised their options as of that date.

Restricted Share Activity Disclosure

A summary of restricted stock award and restricted stock unit activity for the nine months ended October 31, 2010 was as follows:


	Unreleased Restricted Stock
	(in thousands)
Unreleased restricted stock at January 31, 2010		855
Awarded		67
Released		(30	)
Forfeited		(15	)

Unreleased restricted stock at October 31, 2010		877

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

The following table summarizes stock-based compensation expense for the three and nine months ended October 31, 2010 and 2009, respectively, as follows:


	Three Months Ended October 31, 2010			Three Months Ended October 31, 2009
Cost of license and other revenue	$	0.6		$	1.1
Marketing and sales		7.6			13.5
Research and development		5.7			9.5
General and administrative		3.1			6.2

Stock-based compensation expense related to stock awards and ESP Plan purchases		17.0			30.3
Tax benefit		(5.4	)		(9.4	)

Stock-based compensation expense related to stock awards and ESP Plan purchases, net of tax	$	11.6		$	20.9


	Nine Months Ended October 31, 2010			Nine Months Ended October 31, 2009
Cost of license and other revenue	$	2.1		$	2.4
Marketing and sales		27.4			32.5
Research and development		21.2			23.7
General and administrative		11.6			16.1

Stock-based compensation expense related to stock awards and ESP Plan purchases		62.3			74.7
Tax benefit		(17.6	)		(19.4	)

Stock-based compensation expense related to stock awards and ESP Plan purchases, net of tax	$	44.7		$	55.3

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

Autodesk used the Black-Scholes-Merton option-pricing model to estimate the fair value of stock-based awards and the fair value of awards under the ESP Plan based on the following assumptions:


	Three Months Ended October 31, 2010		Three Months Ended October 31, 2009
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	43 - 44%	39 - 47%	45 - 47%	43 - 55%
Range of expected lives (in years)	3.5 - 4.4	0.5 - 2.0	2.7 - 4.0	0.50 - 2.0
Expected dividends	0%	0%	0%	0%
Range of risk-free interest rates	0.86 -1.19%	0.20 - 0.45%	1.25 - 1.98%	0.20 - 0.98%
Expected forfeitures	10.5%	10.5%	13.5%	13.5%

	Nine Months Ended October 31, 2010		Nine Months Ended October 31, 2009
	Stock Option Plans	ESP Plan	Stock Option Plans	ESP Plan
Range of expected volatilities	40 - 44%	33 - 47%	45 - 55%	43 - 73%
Range of expected lives (in years)	2.7 - 4.4	0.50 - 2.0	2.7 - 4.0	0.50 - 2.0
Expected dividends	0%	0%	0%	0%
Range of risk-free interest rates	0.86 - 1.85%	0.20 - 1.05%	1.21 - 2.42%	0.20 - 0.98%
Range of expected forfeitures	10.5 - 13.5%	10.5 - 13.5%	13.5%	13.5%

Computer Equipment, Software, Furniture and Leasehold Improvements, Net (Tables)

9 Months Ended

Oct. 31, 2010

Property, Plant and Equipment

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


	October 31, 2010			January 31, 2010
Computer software, at cost	$	128.8		$	127.3
Computer hardware, at cost		118.1			108.5
Leasehold improvements, land and buildings, at cost		117.2			113.7
Furniture and equipment, at cost		43.5			42.9

		407.6			392.4
Less: Accumulated depreciation		(322.8	)		(290.8	)

Computer software, hardware, leasehold improvements, furniture and equipment, net	$	84.8		$	101.6

Other Intangible Assets, Net (Tables)

9 Months Ended

Oct. 31, 2010

Schedule of Acquired Intangible Assets by Major Class

Other intangible assets include purchased technologies, customer relationships, trade names and the related accumulated amortization were as follows:


	October 31, 2010			January 31, 2010
Purchased technologies, at cost ⁽¹⁾	$	313.1		$	311.5
Customer relationships and trade names, at cost ⁽²⁾		178.6			176.5

		491.7			488.0
Less: Accumulated amortization		(358.2	)		(314.9	)

Other intangible assets, net	$	133.5		$	173.1

⁽¹⁾

⁽²⁾	Customer relationships and trade names are included in “Other assets” in the Condensed Consolidated Balance Sheets.

Goodwill (Tables)

9 Months Ended

Oct. 31, 2010

Goodwill Disclosure

The changes in the carrying amount of goodwill during the nine months ended October 31, 2010 were as follows:


	Platform Solutions and Emerging Business		Architecture, Engineering and Construction			Manufacturing		Media and Entertainment		Total
Balance as of January 31, 2010	$	40.2	$	224.8		$	277.9	$	—	$	542.9
Addition arising from acquisitions		—		—			—		5.5		5.5
Effect of foreign currency translation, purchase accounting adjustments and other		0.5		(0.5	)		1.3		—		1.3

Balance as of October 31, 2010	$	40.7	$	224.3		$	279.2	$	5.5	$	549.7

Restructuring Reserve (Tables)

9 Months Ended

Oct. 31, 2010

Schedule of Restructuring Reserve by Type of Cost

The following table summarizes the restructuring activity recorded in the Condensed Consolidated Balance Sheets during the nine months ended October 31, 2010:


	Balance at January 31, 2010		Additions		Payments			Adjustments⁽¹⁾			Balance at October 31, 2010
Fiscal 2011 Plan
Employee Termination Costs	$	—	$	11.1	$	(9.8	)	$	(0.2	)	$	1.1
Fiscal 2010 Plan
Employee Termination Costs		0.8		—		(0.8	)		—			—
Lease Termination and Asset Costs		6.1		0.1		(3.4	)		(0.2	)		2.6
Fiscal 2009 Plan
Employee Termination Costs		1.0		—		(0.2	)		(0.8	)		—
Lease Termination and Asset Costs		8.2		0.2		(3.8	)		(1.5	)		3.1
Other
Employee Termination Costs		0.4		—		(0.3	)		(0.1	)		—
Lease Termination and Asset Costs		2.9		—		(0.7	)		(0.1	)		2.1

	$	19.4	$	11.4	$	(19.0	)	$	(2.9	)	$	8.9

Current portion⁽²⁾	$	11.4									$	5.2
Non-current portion⁽²⁾		8.0										3.7

	$	19.4									$	8.9

⁽¹⁾	Adjustments include the impact of foreign currency translation.

⁽²⁾	The current and non-current portion of the reserve is recorded in the Condensed Consolidated Balance Sheet under “Other accrued liabilities” and “Other liabilities,” respectively.

Comprehensive Income (Loss) (Tables)

9 Months Ended

Oct. 31, 2010

Comprehensive Income Table

The components of other comprehensive income (loss), net of taxes, were as follows:


	Three Months Ended October 31,						Nine Months Ended October 31,
	2010			2009			2010			2009
Net income	$	53.6		$	29.5		$	150.4		$	7.9
Other comprehensive income (loss)
Net gain (loss) on derivative instruments, net of taxes		(13.0	)		(2.4	)		(10.0	)		(6.3	)
Change in net unrealized gain (loss) on available-for-sale securities, net of tax		0.9			0.9			1.8			1.1
Net change in cumulative foreign currency translation gain (loss)		11.0			6.6			7.7			20.1

Total other comprehensive income (loss)		(1.1	)		5.1			(0.5	)		14.9

Total comprehensive income (loss)	$	52.5		$	34.6		$	149.9		$	22.8

Accumulated Other Comprehensive Income Loss Disclosure

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


	October 31, 2010			January 31, 2010
Net gain (loss) on derivative instruments	$	(7.7	)	$	2.3
Net unrealized gain on available-for-sale securities		3.3			1.5
Unfunded portion of pension plans		(5.9	)		(5.9	)
Foreign currency translation adjustments		6.3			(1.4	)

Accumulated other comprehensive income (loss)	$	(4.0	)	$	(3.5	)

Net Income Per Share (Tables)

9 Months Ended

Oct. 31, 2010

Earnings Per Share Computation

The following table sets forth the computation of the numerators and denominators used in the basic and diluted net income per share amounts:


	Three Months Ended October 31,				Nine Months Ended October 31,
	2010		2009		2010		2009
Numerator:
Net income	$	53.6	$	29.5	$	150.4	$	7.9

Denominator:
Denominator for basic net income per share - weighted average shares		226.5		229.6		227.9		228.5
Effect of dilutive securities		5.9		3.3		5.5		2.6

Denominator for dilutive net income per share		232.4		232.9		233.4		231.1

Basic net income per share	$	0.24	$	0.13	$	0.66	$	0.03

Diluted net income per share	$	0.23	$	0.13	$	0.64	$	0.03

Segments (Tables)

9 Months Ended

Oct. 31, 2010

Schedule of Segment Reporting Information, by Segment

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


	Three Months Ended October 31,						Nine Months Ended October 31,
	2010			2009			2010			2009
Net revenue:
Platform Solutions and Emerging Business	$	173.3		$	154.3		$	534.6		$	459.6
Architecture, Engineering and Construction		136.4			124.8			406.3			375.9
Manufacturing		116.7			89.7			337.3			279.0
Media and Entertainment		50.3			48.1			145.9			142.7
Other		—			—			—			0.4

	$	476.7		$	416.9		$	1,424.1		$	1,257.6

Gross profit:
Platform Solutions and Emerging Business	$	164.1		$	146.5		$	505.6		$	432.8
Architecture, Engineering and Construction		124.5			113.3			368.8			339.9
Manufacturing		109.7			83.7			314.7			257.4
Media and Entertainment		38.9			38.1			112.6			107.6
Unallocated ⁽¹⁾		(9.0	)		(9.7	)		(25.8	)		(27.5	)

	$	428.2		$	371.9		$	1,275.9		$	1,110.2

⁽¹⁾	Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including amortization of purchased technology and stock-based compensation expense.

Reconciliation of Revenue from Segments to Consolidated

Information regarding Autodesk’s net revenue by geographic area was as follows:


	Three Months Ended October 31,				Nine Months Ended October 31,
	2010		2009		2010		2009
Net revenue:
Americas
U.S.	$	142.8	$	131.9	$	409.4	$	394.5
Other Americas		36.5		31.5		99.5		91.8

Total Americas		179.3		163.4		508.9		486.3

Europe, Middle East and Africa		182.9		159.3		570.3		483.4

Asia Pacific
Japan		47.6		39.9		147.8		130.1
Other Asia Pacific		66.9		54.3		197.1		157.8

Total Asia Pacific		114.5		94.2		344.9		287.9

Total net revenue	$	476.7	$	416.9	$	1,424.1	$	1,257.6

Concentration of Credit Risks and Significant Customers - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010 Accounts Receivable	Jan. 31, 2010 Accounts Receivable
U.S. line of credit	$ 250.0		$ 250.0
Total sales to the distributors Tech Data Corporation and its global affiliates ("Tech Data") relative to Autodesk's consolidated net revenue	15.00%	14.00%	16.00%	13.00%
Percentage of gross accounts receivable accounted for by Tech Data					16.00%	15.00%

Cost and Fair Value of Financial Instruments (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010	Jan. 31, 2010	Oct. 31, 2009	Jan. 31, 2009
Cash and cash equivalents	$ 904.3	$ 838.7	$ 698.5	$ 917.6
Marketable securities - short-term	232.5	161.9
Marketable securities - long-term	199.8	125.6
Amortized Cost
Cash and cash equivalents	904.3	838.7
Marketable securities - short-term	231.9	164.8
Marketable securities - long-term	196.8	124.4
Foreign currency forward and option contracts	2.9	2.3
Fair Value
Cash and cash equivalents	904.3	838.7
Marketable securities - short-term	232.5	161.9
Marketable securities - long-term	199.8	125.6
Foreign currency forward and option contracts	$ (2.7)	$ 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	9 Months Ended
	Oct. 31, 2010	Jan. 31, 2010
Short-term investment portfolio	$ 30.6	$ 26.3
Net unrealized gains (losses)	0.4	(3.1)
Cost basis	30.2	29.4
Securities in a continuous unrealized loss position for greater than 12 months	0	0
Notional amount of foreign currency option collar and forward contracts designated as cash flow hedges	306.4	239.1
Gain (loss) expected to be recognized into earnings	(7.7)
Notional amount of foreign currency forward contracts not designated as cash flow hedges	24.9	19.6
Estimated fair value	432.3
Short-term available-for-sale securities
Estimated fair value	201.9	135.6
Short-term available-for-sale securities \| Money market funds
Estimated fair value	10.0	10.0
Long-term available-for-sale securities
Estimated fair value	199.8	125.6
Long-term available-for-sale securities \| Taxable auction rate securities
Estimated fair value	4.2	7.6
Long-term available-for-sale securities \| Taxable auction rate securities \| Redeemed Securities
Estimated fair value	$ 3.4

- Definition

The total of financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition; this is the reason why the trading category of investments in debt and equity securities are bought and sold "principally" for sale in the near term. Transfers into and out of the trading category should be rare. Such financial instruments that are held as of the reporting date are measured at fair value with unrealized holding gains and losses (the difference between fair value and the previously reported carrying amount) included in earnings.

+ References+ Details

Marketable Securities (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010	Jan. 31, 2010
Estimated Fair Value	$ 432.3
Short-term available-for-sale securities
Amortized Cost	201.7	135.4
Gross Unrealized Gains	0.2	0.2
Gross Unrealized Losses
Estimated Fair Value	201.9	135.6
Short-term available-for-sale securities \| Commercial paper and corporate securities
Amortized Cost	77.0	88.8
Gross Unrealized Gains	0.1	0.2
Gross Unrealized Losses
Estimated Fair Value	77.1	89.0
Short-term available-for-sale securities \| US government agency securities
Amortized Cost	47.3	8.8
Gross Unrealized Gains	0.1
Gross Unrealized Losses
Estimated Fair Value	47.4	8.8
Short-term available-for-sale securities \| Certificates of deposit and time deposits
Amortized Cost	29.7	24.6
Gross Unrealized Losses
Estimated Fair Value	29.7	24.6
Short-term available-for-sale securities \| U.S. Treasury Securities
Amortized Cost	25.0
Gross Unrealized Losses
Estimated Fair Value	25.0
Short-term available-for-sale securities \| Money market funds
Amortized Cost	10.0	10.0
Gross Unrealized Losses
Estimated Fair Value	10.0	10.0
Short-term available-for-sale securities \| Sovereign Debt
Amortized Cost	9.1
Gross Unrealized Losses
Estimated Fair Value	9.1
Short-term available-for-sale securities \| Municipal securities
Amortized Cost	3.3	2.8
Gross Unrealized Losses
Estimated Fair Value	3.3	2.8
Short-term available-for-sale securities \| Other
Amortized Cost	0.3	0.4
Gross Unrealized Losses
Estimated Fair Value	0.3	0.4
Long-term available-for-sale securities
Amortized Cost	196.8	124.4
Gross Unrealized Gains	3.0	1.2
Gross Unrealized Losses
Estimated Fair Value	199.8	125.6
Long-term available-for-sale securities \| Commercial paper and corporate securities
Amortized Cost	162.3	94.9
Gross Unrealized Gains	2.4	1.0
Gross Unrealized Losses
Estimated Fair Value	164.7	95.9
Long-term available-for-sale securities \| US government agency securities
Amortized Cost	12.7	9.1
Gross Unrealized Gains	0.3	0.1
Gross Unrealized Losses
Estimated Fair Value	13.0	9.2
Long-term available-for-sale securities \| U.S. Treasury Securities
Amortized Cost	6.3	5.2
Gross Unrealized Gains	0.1
Gross Unrealized Losses
Estimated Fair Value	6.4	5.2
Long-term available-for-sale securities \| Sovereign Debt
Amortized Cost	4.0
Gross Unrealized Gains	0.1
Gross Unrealized Losses
Estimated Fair Value	4.1
Long-term available-for-sale securities \| Municipal securities
Amortized Cost	7.3	7.6
Gross Unrealized Gains	0.1	0.1
Gross Unrealized Losses
Estimated Fair Value	7.4	7.7
Long-term available-for-sale securities \| Taxable auction rate securities
Amortized Cost	4.2	7.6
Gross Unrealized Losses
Estimated Fair Value	$ 4.2	$ 7.6

Estimated Fair Value of Available-for-Sale Marketable Securities (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010
Cost
Due in 1 year	$ 201.7
Due in 1 year through 5 years	192.6
Due in 5 years through 10 years
Due after 10 years	4.2
Total	398.5
Fair Value
Due in 1 year	201.9
Due in 1 year through 5 years	195.6
Due in 5 years through 10 years
Due after 10 years	4.2
Total	$ 401.7

Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010	Jan. 31, 2010
Derivatives not designated as hedging instruments
Total derivative assets	2.1	4.3
Derivatives not designated as hedging instruments
Total derivative liabilities	4.8	0.4
Foreign exchange contracts \| Prepaid expenses and other current assets
Foreign currency contracts designated as cash flow hedges	2.1	4.3
Foreign exchange contracts \| Other accrued liabilities
Foreign currency contracts designated as cash flow hedges	$ 4.8	$ 0.4

Effects of Derivative Instruments on Income and Other Comprehensive Income (Detail) (Foreign exchange contracts, USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

Oct. 31, 2010

Oct. 31, 2009

Oct. 31, 2010

Oct. 31, 2009

Fair Value Hedging

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

$ (10.2)

$ (5.9)

$ 2.7

$ (8.9)

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

2.7

(3.5)

12.7

(4.0)

Fair Value Hedging | Net revenue

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

2.2

(5.2)

11.7

(6.4)

Fair Value Hedging | Operating expenses

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

0.5

1.7

1.0

2.4

Fair Value Hedging | Interest and other income, net

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

(0.1)

0.1

^[1]

0.1

1.7

^[1]

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

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

$ 1.0

$ (0.2)

$ 0.4

$ (1.8)

[1]	Includes $0.1 million loss and $0.9 million gain recognized for the three and nine months ended October 31, 2009, respectively, 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

Oct. 31, 2010

Jan. 31, 2010

Assets

Foreign currency derivative contracts

$ 2.1

^[1]

$ 4.3

^[1]

Total

1,146.2

914.3

Liabilities

Foreign currency derivative contracts

4.8

^[2]

0.4

^[2]

Total

4.8

0.4

Certificates of deposit and time deposits

Assets

Cash equivalents

430.7

^[3]

272.8

^[3]

Marketable securities

29.7

24.6

Commercial Paper

Assets

Cash equivalents

235.8

^[3]

299.5

^[3]

Money market funds

Assets

Cash equivalents

45.3

^[3]

49.4

^[3]

Marketable securities

10.0

Commercial paper and corporate securities

Assets

Marketable securities

241.8

184.9

US government agency securities

Assets

Marketable securities

60.4

18.0

U.S. Treasury Securities

Assets

Marketable securities

31.4

Mutual Funds

Assets

Marketable securities

30.6

26.3

Sovereign Debt

Assets

Marketable securities

13.2

Municipal securities

Assets

Cash equivalents

0.8

^[3]

Marketable securities

10.7

10.5

Taxable auction rate securities

Assets

Marketable securities

4.2

7.6

Other

Assets

Marketable securities

0.3

0.4

U.S. Treasury Securities and Sovereign Debt

Assets

Marketable securities

5.2

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

Assets

Total

366.3

261.1

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

Assets

Cash equivalents

11.1

^[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

196.8

115.9

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

Assets

Marketable securities

60.4

18.0

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

Assets

Marketable securities

31.4

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

Assets

Marketable securities

30.6

26.3

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

Assets

Cash equivalents

0.8

^[3]

Marketable securities

10.7

10.5

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

Assets

Marketable securities

0.3

0.4

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

Assets

Marketable securities

5.2

Significant Other Observable Inputs (Level 2)

Assets

Foreign currency derivative contracts

2.1

^[1]

4.3

^[1]

Total

765.7

635.6

Liabilities

Foreign currency derivative contracts

4.8

^[2]

0.4

^[2]

Total

4.8

0.4

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

Assets

Cash equivalents

419.6

^[3]

208.8

^[3]

Marketable securities

4.7

4.6

Significant Other Observable Inputs (Level 2) | Commercial Paper

Assets

Cash equivalents

235.8

^[3]

299.5

^[3]

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

Assets

Cash equivalents

45.3

^[3]

49.4

^[3]

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

Assets

Marketable securities

45.0

69.0

Significant Other Observable Inputs (Level 2) | Sovereign Debt

Assets

Marketable securities

13.2

Significant Unobservable Inputs (Level 3)

Assets

Total

14.2

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 Condensed Consolidated Balance Sheets.
[2]	Included in "Other accrued liabilities" in the accompanying Condensed Consolidated Balance Sheets.
[3]	Included in "Cash and cash equivalents" in the accompanying Condensed Consolidated Balance Sheets.

Reconciliation of the Change in Level 3 Items (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2010
Beginning Balance	$ 17.6
Transfers into (out of) Level 3
Net purchases (sales) of investments	(3.4)
Total realized/unrealized gains (losses) included in earnings
Ending Balance	14.2
Money market funds
Beginning Balance	10.0
Transfers into (out of) Level 3
Total realized/unrealized gains (losses) included in earnings
Ending Balance	10.0
Taxable auction rate securities
Beginning Balance	7.6
Transfers into (out of) Level 3
Net purchases (sales) of investments	(3.4)
Total realized/unrealized gains (losses) included in earnings
Ending Balance	$ 4.2

Stock-Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009	Jan. 31, 2010
Shares of common stock reserved for issuance	46,400,000		46,400,000
Total compensation costs related to non-vested options	$ 68.3		$ 68.3
Total compensation costs related to non-vested options, expected to be recognized over a weighted average period (in years)	2.1		2.1
Granted/Issued restricted stock units/awards			67,000
Number of units/awards granted but unvested	877,000		877,000		855,000
Weighted average grant date fair value	$ 10.93	$ 8.35	$ 9.19	$ 6.12
Employee Stock Plan, 2008 Plan
Shares of common stock reserved for issuance	16,000,000		16,000,000
Shares available for future issuance	15,900,000		15,900,000
Granted/Issued restricted stock units/awards			44,000
Share-based compensation expense related to restricted stock units/awards	1.9	0.3	5.8	0.8
Total compensation cost related to non-vested awards not yet recognized, expected to be recognized over a weighted average period (in years)	1.1		1.1
Number of units/awards granted but unvested	854,000		854,000
Employee Stock Plan, 2008 Plan \| Restricted Stock and Restricted Stock Units
Shares of common stock reserved for issuance	2,500,000		2,500,000
Outside Directors Option Plan, 2010 Plan
Shares of common stock reserved for issuance	3,000,000		3,000,000
Shares available for future issuance	2,800,000		2,800,000
Granted/Issued restricted stock units/awards			23,000
Share-based compensation expense related to restricted stock units/awards	0.1	0.2	0.5	0.6
Total compensation cost related to non-vested awards not yet recognized	$ 0.3		$ 0.3
Total compensation cost related to non-vested awards not yet recognized, expected to be recognized over a weighted average period (in years)	0.6		0.6
Number of units/awards granted but unvested	23,000		23,000
ESP Plan
Shares available for future issuance	27,800,000		27,800,000
Shares issued under the ESP Plan	1,500,000	1,400,000	3,200,000	3,100,000
Shares issued under the ESP Plan, average price	$ 14.91	$ 14.54	$ 14.77	$ 14.41
Weighted average grant date fair value	$ 7.60	$ 8.35	$ 7.22	$ 7.19

Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Oct. 31, 2010
Number of Shares
Beginning Balance	29,083
Granted	6,539
Exercised	(2,005)
Cancelled	(1,141)
Ending Balance	32,476
Options exercisable at October 31, 2010	19,486
Options available for grant at October 31, 2010	18,669
Weighted average price per share
Beginning of period	$ 27.56
Granted	$ 29.46
Exercised	$ 15.11
Cancelled	$ 31.69
End of period	$ 28.57
Options exercisable at October 31, 2010	$ 30.53

Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Pre-tax intrinsic value of options exercised	$ 15.1	$ 2.9	$ 31.5	$ 15.8
Weighted average grant date fair value per share of stock options granted	$ 10.93	$ 8.35	$ 9.19	$ 6.12

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

Oct. 31, 2010

Jan. 31, 2010

Options Exercisable - Number of Shares

19,486

Options Exercisable - Weighted average contractual life (in years)

2.6

Options Exercisable - Weighted average exercise price

$ 30.53

Options Exercisable - Aggregate intrinsic value

$ 159.2

^[1]

Options Outstanding - Number of Shares

32,476

29,083

Options Outstanding - Weighted average contractual life (in years)

3.8

Options Outstanding - Weighted average exercise price

$ 28.57

$ 27.56

Range 1

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

4,109

Options Exercisable - Weighted average exercise price

$ 11.18

Options Outstanding - Number of Shares

8,040

Options Outstanding - Weighted average exercise price

$ 12.91

Range 2

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

3,348

Options Exercisable - Weighted average exercise price

$ 23.86

Options Outstanding - Number of Shares

8,964

Options Outstanding - Weighted average exercise price

$ 26.83

Range 3

Range of per-share exercise prices, Lower Limit

$ 29.50

Range of per-share exercise prices, Upper Limit

$ 34.53

Options Exercisable - Number of Shares

3,620

Options Exercisable - Weighted average exercise price

$ 32.08

Options Outstanding - Number of Shares

6,573

Options Outstanding - Weighted average exercise price

$ 31.74

Range 4

Range of per-share exercise prices, Lower Limit

$ 35.00

Range of per-share exercise prices, Upper Limit

$ 45.29

Options Exercisable - Number of Shares

7,707

Options Exercisable - Weighted average exercise price

$ 41.38

Options Outstanding - Number of Shares

8,111

Options Outstanding - Weighted average exercise price

$ 41.52

Range 5

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

702

Options Exercisable - Weighted average exercise price

$ 48.57

Options Outstanding - Number of Shares

788

Options Outstanding - Weighted average exercise price

$ 48.57

[1]	Represents the total pre-tax intrinsic value, based on Autodesk's closing stock price of $36.20 per share as of October 31, 2010, 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) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 31, 2010
Unreleased restricted stock
Beginning Balance	855
Awarded	67
Released	(30)
Forfeited	(15)
Ending Balance	877

Stock-Based Compensation Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Stock-based compensation expense related to stock awards and ESP Plan purchases	$ 17.0	$ 30.3	$ 62.3	$ 74.7
Tax benefit	(5.4)	(9.4)	(17.6)	(19.4)
Stock-based compensation expense related to stock awards and ESP Plan purchases, net of tax	11.6	20.9	44.7	55.3
Cost of license and other revenue
Stock-based compensation expense	0.6	1.1	2.1	2.4
Marketing and sales
Stock-based compensation expense	7.6	13.5	27.4	32.5
Research and development
Stock-based compensation expense	5.7	9.5	21.2	23.7
General and administrative
Stock-based compensation expense	$ 3.1	$ 6.2	$ 11.6	$ 16.1

Assumptions used to Estimate the Fair Value of Stock-Based Awards (Detail)	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Stock Option Plans
Expected dividends	0.00%	0.00%	0.00%	0.00%
Expected forfeitures	10.50%	13.50%
Stock Option Plans \| Lower Limit
Expected volatilities	43.00%	45.00%	40.00%	45.00%
Expected lives (in years)	3.5	2.7	2.7	2.7
Risk-free interest rates	0.86%	1.25%	0.86%	1.21%
Expected forfeitures			10.50%	13.50%
Stock Option Plans \| Upper Limit
Expected volatilities	44.00%	47.00%	44.00%	55.00%
Expected lives (in years)	4.4	4.0	4.4	4.0
Risk-free interest rates	1.19%	1.98%	1.85%	2.42%
Expected forfeitures			13.50%	13.50%
ESP Plan
Expected dividends	0.00%	0.00%	0.00%	0.00%
Expected forfeitures	10.50%	13.50%
ESP Plan \| Lower Limit
Expected volatilities	39.00%	43.00%	33.00%	43.00%
Expected lives (in years)	0.5	0.5	0.5	0.5
Risk-free interest rates	0.20%	0.20%	0.20%	0.20%
Expected forfeitures			10.50%	13.50%
ESP Plan \| Upper Limit
Expected volatilities	47.00%	55.00%	47.00%	73.00%
Expected lives (in years)	2.0	2.0	2.0	2.0
Risk-free interest rates	0.45%	0.98%	1.05%	0.98%
Expected forfeitures			13.50%	13.50%

Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Oct. 31, 2010	Apr. 30, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Effective tax rates	25.00%		8.00%	24.00%	70.00%
Effective tax rate increase	17.00%			(46.00%)
Discrete tax benefit related to additional stock-based compensation expense	$ 4.4
Discrete non-cash tax charge from recording a valuation allowance		20.9
Discrete tax benefit associated with the impairment of goodwill		7.7
Federal statutory tax rate	35.00%			35.00%
Gross unrecognized tax benefits	185.8			185.8
Amount of unrecognized tax benefits that would impact the effective tax rate, if recognized	173.4			173.4
Items that would result in balance sheet reclassification only, with no impact to income tax expense	12.4			12.4
Deferred tax assets	$ 152.4			$ 152.4

Deferred Compensation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010	Jan. 31, 2010
Marketable securities	$ 432.3
Debt and equity securities held in trust under non-qualified deferred compensation plans	30.6	26.3
Deferred compensation liability	30.6	26.3
Deferred compensation liability current	1.4	1.1
Deferred compensation liability non-current	$ 29.2	$ 25.2

Computer Software and Hardware, Leasehold Improvements, Furniture and Equipment and Related Accumulated Depreciation (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010	Jan. 31, 2010
Computer software, at cost	$ 128.8	$ 127.3
Computer hardware, at cost	118.1	108.5
Leasehold improvements, land and buildings, at cost	117.2	113.7
Furniture and equipment, at cost	43.5	42.9
Property, Plant and Equipment, Gross, Total	407.6	392.4
Less: Accumulated depreciation	(322.8)	(290.8)
Computer software, hardware, leasehold improvements, furniture and equipment, net	$ 84.8	$ 101.6

Other Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified

Oct. 31, 2010

Jan. 31, 2010

Purchased technologies, at cost

$ 313.1

^[1]

$ 311.5

^[1]

Customer relationships and trade names, at cost

178.6

^[2]

176.5

^[2]

Finite-Lived Intangible Assets, Gross, Total

491.7

488.0

Less: Accumulated amortization

(358.2)

(314.9)

Other intangible assets, net

$ 133.5

$ 173.1

[1]

[2]

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

Changes in the Carrying Amount of Goodwill (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2010
Beginning Balance	$ 542.9
Addition arising from acquisitions	5.5
Effect of foreign currency translation, purchase accounting adjustments and other	1.3
Ending Balance	549.7
Platform Solutions and Emerging Business
Beginning Balance	40.2
Effect of foreign currency translation, purchase accounting adjustments and other	0.5
Ending Balance	40.7
Architecture, Engineering and Construction
Beginning Balance	224.8
Effect of foreign currency translation, purchase accounting adjustments and other	(0.5)
Ending Balance	224.3
Manufacturing
Beginning Balance	277.9
Effect of foreign currency translation, purchase accounting adjustments and other	1.3
Ending Balance	279.2
Media and Entertainment
Addition arising from acquisitions	5.5
Ending Balance	$ 5.5

Borrowing Arrangements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2010
Line of credit facility, maximum borrowing capacity	$ 250.0
Domestic Line of Credit
Line of credit facility, maximum borrowing capacity	250.0
Line of credit facility, outstanding borrowings	$ 0
Line of credit facility, expiration	August 2012

Restructuring Reserve - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended
	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010 Fiscal 2011 Plan	Oct. 31, 2010 Fiscal 2011 Plan	Apr. 30, 2010 Fiscal 2011 Plan Minimum	Apr. 30, 2010 Fiscal 2011 Plan Maximum
Restructuring plan					initiated a restructuring plan in order to further reduce operating costs.
Targeted staff reductions						210	230
Restructuring program, reduced the number of employees				20	190
Restructuring charges	$ 4.9	$ 9.0	$ 47.8	$ 0	$ 9.0	$ 10.0	$ 12.0

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

9 Months Ended

Oct. 31, 2010

Jan. 31, 2010

Beginning Balance

$ 19.4

Current portion

5.2

^[1]

11.4

^[1]

Additions

11.4

Non-current portion

3.7

^[1]

8.0

^[1]

Payments

(19.0)

Adjustments

(2.9)

^[2]

Restructuring Reserve, Total

8.9

Ending Balance

8.9

Fiscal 2011 Plan | Employee Termination Costs

Additions

11.1

Payments

(9.8)

Adjustments

(0.2)

^[2]

Restructuring Reserve, Total

1.1

Ending Balance

1.1

Fiscal 2010 Plan | Employee Termination Costs

Beginning Balance

0.8

Payments

(0.8)

Fiscal 2010 Plan | Lease Termination and Asset Costs

6.1

0.1

(3.4)

(0.2)

^[2]

Restructuring Reserve, Total

2.6

Ending Balance

2.6

Fiscal 2009 Plan | Employee Termination Costs

Beginning Balance

1.0

Payments

(0.2)

Adjustments

(0.8)

^[2]

Fiscal 2009 Plan | Lease Termination and Asset Costs

8.2

0.2

(3.8)

(1.5)

^[2]

Restructuring Reserve, Total

3.1

Ending Balance

3.1

Other | Employee Termination Costs

Beginning Balance

0.4

Payments

(0.3)

Adjustments

(0.1)

^[2]

Other | Lease Termination and Asset Costs

Beginning Balance

2.9

Payments

(0.7)

Adjustments

(0.1)

^[2]

Restructuring Reserve, Total

2.1

Ending Balance

$ 2.1

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

Common Stock Repurchase Program - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 31, 2010	Oct. 31, 2010
Repurchased shares of its common stock on the open market, shares	2.5	7.0
Repurchased shares of its common stock on the open market, average repurchase price per share	$ 29.93	$ 29.13
Shares remained available for repurchase under stock repurchase program	6.5	6.5
Common Stock Including Additional Paid in Capital
Repurchased shares of its common stock on the open market, value	$ 35.7	$ 99.0
Retained Earnings
Repurchased shares of its common stock on the open market, value	$ 39.2	$ 105.1

Components of Other Comprehensive Income (Loss), Net of Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Net income	$ 53.6	$ 29.5	$ 150.4	$ 7.9
Other comprehensive income (loss)
Net gain (loss) on derivative instruments, net of taxes	(13.0)	(2.4)	(10.0)	(6.3)
Change in net unrealized gain (loss) on available-for-sale securities, net of tax	0.9	0.9	1.8	1.1
Net change in cumulative foreign currency translation gain (loss)	11.0	6.6	7.7	20.1
Total other comprehensive income (loss)	(1.1)	5.1	(0.5)	14.9
Total comprehensive income (loss)	$ 52.5	$ 34.6	$ 149.9	$ 22.8

- 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

- Definition

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses.

+ References+ Details

- Definition

Appreciation or loss in value (before reclassification adjustment) of the total of unsold securities during the period being reported on, net of tax. Reclassification adjustments include: (1) the unrealized holding gain or loss, net of tax, at the date of the transfer for a debt security from the held-to-maturity category transferred into the available-for-sale category. Also includes the unrealized gain or loss at the date of transfer for a debt security from the available-for-sale category transferred into the held-to-maturity category; (2) the unrealized gains or losses realized upon the sale of securities, after tax; and (3) the unrealized gains or losses realized upon the write-down of securities, after tax.

+ References+ Details

Accumulated Other Comprehensive Income Loss, Net of Taxes (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010	Jan. 31, 2010
Net gain (loss) on derivative instruments	$ (7.7)	$ 2.3
Net unrealized gain on available-for-sale securities	3.3	1.5
Unfunded portion of pension plans	(5.9)	(5.9)
Foreign currency translation adjustments	6.3	(1.4)
Accumulated other comprehensive income (loss)	$ (4.0)	$ (3.5)

Computation of the Numerators and Denominators used in Basic and Diluted Net Income Per Share (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Numerator:
Net income	$ 53.6	$ 29.5	$ 150.4	$ 7.9
Denominator:
Denominator for basic net income per share - weighted average shares	226.5	229.6	227.9	228.5
Effect of dilutive securities	5.9	3.3	5.5	2.6
Denominator for dilutive net income per share	232.4	232.9	233.4	231.1
Basic net income per share	$ 0.24	$ 0.13	$ 0.66	$ 0.03
Diluted net income per share	$ 0.23	$ 0.13	$ 0.64	$ 0.03

- Definition

+ References+ Details

Net Income (Loss) Per Share - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Potentially dilutive shares excluded from the computation of diluted net income per share	20.2	17.6	19.9	22.3

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

3 Months Ended

9 Months Ended

Oct. 31, 2010

Oct. 31, 2009

Oct. 31, 2010

Oct. 31, 2009

Net revenue

$ 476.7

$ 416.9

$ 1,424.1

$ 1,257.6

Gross profit

428.2

371.9

1,275.9

1,110.2

Platform Solutions and Emerging Business

Net revenue

173.3

154.3

534.6

459.6

Gross profit

164.1

146.5

505.6

432.8

Architecture, Engineering and Construction

Net revenue

136.4

124.8

406.3

375.9

Gross profit

124.5

113.3

368.8

339.9

Manufacturing

Net revenue

116.7

89.7

337.3

279.0

Gross profit

109.7

83.7

314.7

257.4

Media and Entertainment

Net revenue

50.3

48.1

145.9

142.7

Gross profit

38.9

38.1

112.6

107.6

Other

Net revenue

0.4

Unallocated

Gross profit

$ (9.0)

^[1]

$ (9.7)

^[1]

$ (25.8)

^[1]

$ (27.5)

^[1]

[1]	Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including amortization of purchased technology and stock-based compensation expense.

Operations by Geographic Area (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2010	Oct. 31, 2009
Net revenue	$ 476.7	$ 416.9	$ 1,424.1	$ 1,257.6
Americas
Net revenue	179.3	163.4	508.9	486.3
Americas \| United States
Net revenue	142.8	131.9	409.4	394.5
Americas \| Other Americas
Net revenue	36.5	31.5	99.5	91.8
Europe, Middle East and Africa
Net revenue	182.9	159.3	570.3	483.4
Asia Pacific
Net revenue	114.5	94.2	344.9	287.9
Asia Pacific \| Japan
Net revenue	47.6	39.9	147.8	130.1
Asia Pacific \| Other Asia Pacific
Net revenue	$ 66.9	$ 54.3	$ 197.1	$ 157.8

Effects of Derivative Instruments on Income and Other Comprehensive Income (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 31, 2009	Oct. 31, 2009
Gain (loss) recognized, due to previously forecasted transactions that did not occur within the originally specified time period or the additional period of time allowed	$ 0.1	$ 0.9

Other Intangible Assets (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Oct. 31, 2010	Jan. 31, 2010
In-process research and development technology	$ 0	$ 4.3
In-process research and development being amortized	$ 4.3

Goodwill - Additional Information (Detail)	9 Months Ended
Goodwill - Additional Information (Detail)	Oct. 31, 2010
Impact on carrying value of goodwill	a hypothetical 10% decrease in the fair value of our 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 impairment, of goodwill for the respective reporting units.