Document and Entity Information	9 Months Ended
Document and Entity Information	Oct. 31, 2015	Nov. 30, 2015
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 31, 2015
Document Fiscal Year Focus	2016
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		225,323,161

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Net revenue:
License and other	$ 280.9	$ 320.5	$ 898.1	$ 987.1
Subscription	318.9	297.5	957.7	860.5
Total net revenue	599.8	618.0	1,855.8	1,847.6
Cost of revenue:
Cost of license and other revenue	53.0	51.9	159.1	154.6
Cost of subscription revenue	38.0	34.1	116.7	98.0
Total cost of revenue	91.0	86.0	275.8	252.6
Gross profit	508.8	532.0	1,580.0	1,595.0
Operating expenses:
Marketing and sales	243.4	245.1	738.1	708.1
Research and development	197.9	183.9	585.5	533.7
General and administrative	74.2	78.9	220.2	212.9
Amortization of purchased intangibles	8.1	9.5	25.2	30.5
Restructuring charges, net	0	0	0	3.1
Total operating expenses	523.6	517.4	1,569.0	1,488.3
(Loss) income from operations	(14.8)	14.6	11.0	106.7
Interest and other expense, net	(7.7)	(3.0)	(10.8)	(16.6)
(Loss) income before income taxes	(22.5)	11.6	0.2	90.1
Provision for income taxes	(21.3)	(0.9)	(293.5)	(19.8)
Net (loss) income	$ (43.8)	$ 10.7	$ (293.3)	$ 70.3
Basic net (loss) income per share (in usd per share)	$ (0.19)	$ 0.05	$ (1.29)	$ 0.31
Diluted net (loss) income per share (in usd per share)	$ (0.19)	$ 0.05	$ (1.29)	$ 0.30
Weighted average shares used in computing basic net (loss) income per share (shares)	225.3	226.9	226.5	227.1
Weighted average shares used in computing diluted net (loss) income per share (shares)	225.3	231.5	226.5	231.9

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

Oct. 31, 2015

Oct. 31, 2014

Oct. 31, 2015

Oct. 31, 2014

Statement of Comprehensive Income [Abstract]

Net (loss) income

$ (43.8)

$ 10.7

$ (293.3)

$ 70.3

Other comprehensive (loss) income, net of reclassifications:

Net (loss) gain on derivative instruments (net of tax effect of $0.0, $0.5, ($0.7) and ($0.6), respectively)

(12.1)

21.1

(22.2)

19.6

Change in net unrealized loss on available-for-sale securities (net of tax effect of $0.0, $0.7, $0.2 and $0.7, respectively)

(0.4)

(0.5)

(1.6)

(2.1)

Change in defined benefit pension items

0.3

^[1]

1.3

^[1]

Net change in cumulative foreign currency translation loss (net of tax effect of ($4.5), $3.4, $0.0, and $2.9, respectively)

(4.0)

(24.2)

(10.7)

(18.2)

Total other comprehensive loss

(16.2)

(3.6)

(33.2)

(0.7)

Total comprehensive (loss) income

$ (60.0)

$ 7.1

$ (326.5)

$ 69.6

[1]	There were no tax effects related to defined benefit pension items for each of the periods presented.

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References+ Details

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Statement of Comprehensive Income [Abstract]
Net gain (loss) on derivative instruments - tax effect	$ 0	$ 0.5	$ (0.7)	$ (0.6)
Change in net unrealized loss on available-for-sale securities, tax effect	0	0.7	0.2	0.7
Net change in cumulative foreign currency translation (loss) gain, tax effect	$ (4.5)	$ 3.4	$ 0	$ 2.9

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Oct. 31, 2015	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,337.5	$ 1,410.6
Marketable securities	946.8	615.8
Accounts receivable, net	362.3	458.9
Deferred income taxes, net	10.2	85.1
Prepaid expenses and other current assets	90.7	100.9
Total current assets	2,747.5	2,671.3
Marketable securities	540.1	273.0
Computer equipment, software, furniture and leasehold improvements, net	155.3	159.2
Developed technologies, net	76.1	86.5
Goodwill	1,515.0	1,456.2
Deferred income taxes, net	4.4	100.0
Other assets	181.6	163.5
Total assets	5,220.0	4,909.7
Current liabilities:
Accounts payable	104.6	100.5
Accrued compensation	193.8	253.3
Accrued income taxes	28.2	28.2
Deferred revenue	877.0	900.8
Borrowings under line of credit	0	0
Other accrued liabilities	107.6	117.3
Total current liabilities	1,311.2	1,400.1
Deferred revenue	335.3	256.3
Long term income taxes payable	163.8	158.8
Long term deferred income taxes	54.9	0
Long term notes payable, net	1,486.9	743.1
Other liabilities	134.8	132.2
Stockholders’ equity:
Preferred stock	0	0
Common stock and additional paid-in capital	1,809.9	1,773.1
Accumulated other comprehensive loss	(86.5)	(53.3)
Retained earnings	9.7	499.4
Total stockholders’ equity	1,733.1	2,219.2
Total liabilities and stockholders' equity	$ 5,220.0	$ 4,909.7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Operating activities:
Net (loss) income	$ (293.3)	$ 70.3
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation, amortization and accretion	109.7	109.9
Stock-based compensation expense	141.1	116.5
Deferred income taxes	221.9	(13.7)
Restructuring charges, net	0	3.1
Other operating activities	(10.6)	9.5
Changes in operating assets and liabilities, net of business combinations:
Accounts receivable	97.4	65.9
Prepaid expenses and other current assets	(5.5)	7.7
Accounts payable and accrued liabilities	(75.1)	7.6
Deferred revenue	54.5	94.3
Accrued income taxes	4.0	(20.2)
Net cash provided by operating activities	244.1	450.9
Investing activities:
Purchases of marketable securities	(1,827.9)	(899.0)
Sales of marketable securities	263.0	160.7
Maturities of marketable securities	970.7	623.2
Capital expenditures	(41.8)	(60.0)
Acquisitions, net of cash acquired	(104.6)	(603.8)
Other investing activities	(15.5)	1.2
Net cash used in investing activities	(756.1)	(777.7)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	57.0	129.6
Repurchase and retirement of common shares	(357.7)	(307.6)
Proceeds from debt, net of discount	748.3	0
Other financing activities	(6.3)	(1.7)
Net cash provided by (used in) financing activities	441.3	(179.7)
Effect of exchange rate changes on cash and cash equivalents	(2.4)	(1.5)
Net (decrease) in cash and cash equivalents	(73.1)	(508.0)
Cash and cash equivalents at beginning of fiscal year	1,410.6	1,853.0
Cash and cash equivalents at end of period	$ 1,337.5	$ 1,345.0

Basis of Presentation	9 Months Ended
Basis of Presentation	Oct. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements of Autodesk, Inc. (“Autodesk,” “we,” “us,” “our,” or the “Company”) as of October 31, 2015, and for the three and nine months ended October 31, 2015 and 2014, have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") 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 GAAP for annual financial statements. In management’s opinion, Autodesk made all adjustments (consisting of normal, recurring and non-recurring adjustments) during the quarter that were considered necessary for the fair statement 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, 2015 are not necessarily indicative of the results for the entire fiscal year ending January 31, 2016, or for any other period. There have been no material changes to Autodesk's significant accounting policies as compared to the significant accounting policies disclosed in the Annual Report on Form 10-K for the fiscal year ended January 31, 2015. 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, 2015, filed on March 18, 2015. Prior Period Adjustments Autodesk previously established a valuation allowance against the Company’s deferred tax assets during the three months ended July 31, 2015. In the course of preparing the Condensed Consolidated Financial Statements for the three and nine months ended October 31, 2015, Autodesk determined that it had understated income tax expense by $33.1 million for the three and six months ended July 31, 2015, primarily related to an error in the establishment of the valuation allowance, which had been understated at July 31, 2015. Autodesk performed the analysis required by Staff Accounting Bulletin 99, Materiality, to evaluate the materiality of the error, quantitatively and qualitatively, and concluded it was not material to the Company’s Condensed Consolidated Financial Statements as of July 31, 2015 and for the three and six month periods ended July 31, 2015. However, in light of the significance of a correction of the error to the results for the three months ended October 31, 2015, Autodesk chose to correct the error by revising the previously reported results for the three and six months ended July 31, 2015, to include the additional $33.1 million of income tax expense associated with the establishment of the valuation allowance. See Note 6, "Income Tax," in the Notes to the Condensed Consolidated Financial Statements for further discussion. During the quarter ended April 30, 2015, Autodesk determined that it had not correctly accounted for certain liabilities primarily related to employee benefits and unclaimed property. Accordingly, during the nine months ended October 31, 2015, we recorded $5.7 million of additional operating expenses related to prior periods. As these adjustments were related to the correction of errors, Autodesk performed the analysis required by Staff Accounting Bulletin 99, Materiality, and Staff Accounting Bulletin 108, Considering the Effects of Prior Year Misstatements When Quantifying Misstatements in Current Year Financial Statements. Based on this analysis, Autodesk concluded that the effect of the errors was not material to the financial position, results of operations or cash flows of any prior fiscal year from both a quantitative and qualitative perspective and is not anticipated to be material to the full fiscal year 2016.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References+ Details

Recently Issued Accounting Standards	9 Months Ended
Recently Issued Accounting Standards	Oct. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Issued Accounting Standards	Recently Issued Accounting Standards With the exception of those discussed below, there have been no recent changes in accounting pronouncements issued by the Financial Accounting Standards Board (“FASB”) or adopted by the Company during the nine months ended October 31, 2015, that are of significance, or potential significance, to the Company. Accounting Standards Adopted Effective in the third quarter of fiscal 2016, Autodesk elected to early adopt FABS's Accounting Standards Update No. 2015-16 ("ASU 2015-16") regarding ASC Topic 805 "Business Combinations: Simplifying the Accounting for Measurement-Period Adjustments." The amendments in ASU 2015-16 eliminate the requirement to restate prior period financial statements for measurement period adjustments. The amendments also require that the cumulative impact of a measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified. The amendments for ASU-2015-16 were prospectively applied and did not have a material impact on Autodesk's consolidated financial statements. Effective in the second quarter of fiscal 2016, Autodesk elected to early adopt FASB's Accounting Standards Update 2015-03 (“ASU 2015-03”) regarding Subtopic 835-30 “Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs.” The amendments in ASU 2015-03 require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The standard requires retrospective application and represents a change in accounting principle. The adoption of ASU 2015-03 resulted in a $4.1 million retrospective reduction of both our other assets and long term notes payable, net, as of January 31, 2015. Recently Issued Accounting Standards In November 2015, the FASB issued Accounting Standards Update No. 2015-17 ("ASU 2015-17") regarding ASC Topic 470 "Income Taxes: Balance Sheet Classification of Deferred Taxes." The amendments in ASU 2015-17 eliminate the requirement to bifurcate Deferred Taxes between current and non-current on the balance sheet and requires that deferred tax liabilities and assets be classified as noncurrent on the balance sheet. The amendments for ASU-2015-17 can be applied retrospectively or prospectively and early adoption is permitted. Autodesk does not expect ASU 2015-17 to have a material impact on Autodesk's consolidated financial statements. In May 2015, the FASB issued Accounting Standards Update No. 2015-07 ("ASU 2015-07") regarding ASC Topic 820 "Fair Value Measurement: Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)." The amendments in ASU 2015-07 remove the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. The amendments also limit certain disclosures to investments for which the entity has elected to measure at fair value using the net asset value per share practical expedient. The amendments in ASU 2015-07 are effective for annual and interim periods beginning after December 15, 2015. Early adoption is permitted. The amendments should be applied retrospectively by removing from the fair value hierarchy any investments for which fair value is measured using the net asset value per share practical expedient. Autodesk does not expect ASU 2015-07 to have a material impact on its consolidated financial statements. In April 2015, the FASB issued Accounting Standards Update No. 2015-05 ("ASU 2015-05") regarding Subtopic 350-40, “Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Fees Paid in a Cloud Computing Arrangement.” The amendments in this ASU provide guidance about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The amendments in ASU 2015-05 are effective for annual and interim periods beginning after December 15, 2015. Early adoption is permitted. The amendments in ASU 2015-05 may be applied either prospectively to all arrangements entered into or materially modified after the effective date or retrospectively. Autodesk does not expect ASU 2015-05 to have a material impact on its consolidated financial statements. In May 2014, the FASB issued Accounting Standards Update 2014-09 ("ASU 2014-09") regarding ASC Topic 606 “Revenue from Contracts with Customers.” ASU 2014-09 provides principles for recognizing revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. On July 7, 2015, the FASB amended ASU 2014-09 to defer the effective date by one year with early adoption permitted as of the original effective date. ASU 2014-09 will be effective for Autodesk’s fiscal year beginning February 1, 2018 unless we elect the earlier date of February 1, 2017. Autodesk is currently evaluating the accounting, transition and disclosure requirements of the standard and can neither estimate the current financial statement impact of adoption, nor the effective date election.

- Definition

The entire disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

-Paragraph 13

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-Glossary Direct Effects of a Change in Accounting Principle

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-Glossary Indirect Effects of a Change in Accounting Principle

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-Subparagraph (SX 210.10-01.(b)(6))

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+ Details

Concentration of Credit Risk	9 Months Ended
Concentration of Credit Risk	Oct. 31, 2015
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	Concentration of Credit Risk Autodesk places its cash, cash equivalents and marketable securities in highly liquid instruments with, and in the custody of, diversified financial institutions globally with high credit ratings and limits the amounts invested with any one institution, type of security and issuer. Autodesk’s primary commercial banking relationship is with Citigroup Inc. and its global affiliates. Citibank, N.A., an affiliate of Citigroup, is one of the lead lenders and an agent in the syndicate of Autodesk’s $400.0 million line of credit facility. Total sales to the distributor Tech Data Corporation and its global affiliates (“Tech Data”) accounted for 26% and 25% of Autodesk’s total net revenue for the three and nine months ended October 31, 2015, respectively, and 26% for both the three and nine months ended October 31, 2014. The majority of the net revenue from sales to Tech Data relates to Autodesk’s Architecture, Engineering and Construction (“AEC”) segment and is for sales made outside of the United States. In addition, Tech Data accounted for 25% and 22% of trade accounts receivable at October 31, 2015 and January 31, 2015, respectively.

- Definition

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

+ References+ Details

Financial Instruments

9 Months Ended

Oct. 31, 2015

Investments, All Other Investments [Abstract]

Financial Instruments

The following tables summarize the Company's financial instruments' amortized cost, gross unrealized gains, gross unrealized losses, and fair value by significant investment category as of October 31, 2015 and January 31, 2015:



			October 31, 2015
			Amortized Cost		Gross unrealized gains		Gross unrealized losses			Fair Value		Level 1		Level 2		Level 3
Cash equivalents (1):
	Certificates of deposit		$	323.4	$	—	$	—		$	323.4	$	323.4	$	—	$	—
	Custody cash deposit		40.0		—		—			40.0		40.0		—		—
	Commercial paper		153.6		—		—			153.6		—		153.6		—
	Corporate bonds		5.0		—		—			5.0		5.0		—		—
	Money market funds		283.5		—		—			283.5		—		283.5		—
	Agency bonds		3.0		—		—			3.0		3.0		—		—
	Municipal bonds		15.0		—		—			15.0		15.0		—		—
Marketable securities:
	Short-term available-for-sale
		U.S. government agency bonds	59.4		—		—			59.4		59.4		—		—
		Certificate of deposit	202.4		—		—			202.4		202.4		—		—
		Commercial paper	176.4		—		—			176.4		—		176.4		—
		Corporate bonds	374.1		0.1		(0.3		)	373.9		373.9		—		—
		Sovereign debt	17.4		—		—			17.4		—		17.4		—
		U.S. treasury bills	47.5		—		—			47.5		47.5		—		—
		Asset backed securities	3.4		—		—			3.4		—		3.4		—
		Municipal bonds	22.4		—		—			22.4		22.4		—		—
	Short-term trading securities
		Mutual funds	41.0		3.1		(0.1		)	44.0		44.0		—		—
	Long-term available-for-sale
		Agency bonds	59.6		0.1		—			59.7		59.7		—		—
		Corporate bonds	343.6		0.3		(0.9		)	343.0		343.0		—		—
		Municipal bonds	2.9		—		—			2.9		2.9		—		—
		U.S. government agency securities	74.6		0.1		(0.1		)	74.6		74.6		—		—
		Sovereign debt	24.5		—		—			24.5		—		24.5		—
		Asset backed securities	35.4		—		—			35.4		—		35.4		—
Convertible debt securities (2)			2.8		2.0		(1.1		)	3.7		—		—		3.7
Derivative contracts (3)			2.2		3.2		(3.8		)	1.6		—		1.1		0.5
		Total	$	2,313.1	$	8.9	$	(6.3	)	$	2,315.7	$	1,616.2	$	695.3	$	4.2

____________________


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


(2)	Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.


(3)	Included in “Prepaid expenses and other current assets,” “Other assets,” or “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.



			January 31, 2015
			Amortized Cost		Gross unrealized gains		Gross unrealized losses			Fair Value		Level 1		Level 2		Level 3
Cash equivalents (1):
	Certificates of deposit		$	258.6	$	—	$	—		$	258.6	$	258.6	$	—	$	—
	Custody cash deposit		141.5		—		—			141.5		141.5		—		—
	Commercial paper		161.0		—		—			161.0		—		161.0		—
	Corporate bond		11.5		—		—			11.5		11.5		—		—
	Money market funds		127.3		—		—			127.3		—		127.3		—
Marketable securities:
	Short-term available-for-sale
		Agency bond	37.9		—		—			37.9		37.9		—		—
		Corporate debt securities	148.0		0.1		(0.1		)	148.0		148.0		—		—
		Municipal bonds	29.2		0.1		—			29.3		29.3		—		—
		Certificates of deposit	101.9		—		—			101.9		101.9		—		—
		Commercial paper	258.4		—		—			258.4		—		258.4		—
	Short-term trading securities
		Mutual funds	36.9		3.4		—			40.3		40.3		—		—
	Long-term available-for-sale
		Agency bond	50.6		0.2		—			50.8		50.8		—		—
		Corporate debt securities	199.4		0.6		(0.2		)	199.8		199.8		—		—
		Municipal bonds	13.3		0.1		—			13.4		13.4		—		—
		U.S. government agency securities	8.9		0.1		—			9.0		9.0		—		—
Convertible debt securities (2)			4.7		2.5		(2.1		)	5.1		—		—		5.1
Derivative contracts (3)			3.5		19.5		(7.0		)	16.0		—		15.1		0.9
		Total	$	1,592.6	$	26.6	$	(9.4	)	$	1,609.8	$	1,042.0	$	561.8	$	6.0

____________________


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


(2)	Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.


(3)	Included in “Prepaid expenses and other current assets,” “Other assets,” or “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.

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 up to 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 applies fair value accounting for certain financial assets and liabilities, which consist of cash equivalents, marketable securities and other financial instruments, that are recognized or disclosed at fair value in the financial statements on a recurring basis. The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: (Level 1) observable inputs such as quoted prices in active markets; (Level 2) inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and (Level 3) unobservable inputs for which there is little or no market data, which require Autodesk to develop its own assumptions. When determining fair value, Autodesk uses observable market data and relies on unobservable inputs only when observable market data is not available. There have been no transfers between fair value measurement levels during the three and nine months ended October 31, 2015.

Autodesk's cash equivalents, marketable securities and financial instruments are primarily classified within Level 1 or Level 2 of the fair value hierarchy. Autodesk values its available-for-sale securities on pricing from pricing vendors, who may use quoted prices in active markets for identical assets (Level 1) or inputs other than quoted prices that are observable either directly or indirectly in determining fair value (Level 2). Autodesk's Level 2 securities are valued primarily using observable inputs other than quoted prices in active markets for identical assets and liabilities. Autodesk's Level 3 securities consist of investments held in convertible debt securities and derivative contracts which are valued using probability weighted discounted cash flow models as some of the inputs to the models are unobservable in the market.

A reconciliation of the change in Autodesk’s Level 3 items for the nine months ended October 31, 2015 was as follows:



	Fair Value Measurements Using Significant Unobservable Inputs
	(Level 3)
		Derivative Contracts			Convertible Debt Securities			Total
Balance at January 31, 2015		$	0.9		$	5.1		$	6.0
Purchases		4.3			6.2			10.5
Settlements		(5.7		)	(8.0		)	(13.7		)
Gains included in earnings		1.0			—			1.0
Gains included in OCI		—			0.4			0.4
Balance at October 31, 2015		$	0.5		$	3.7		$	4.2

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



	October 31, 2015
	Cost		Fair Value
Due within 1 year	$	903.0	$	902.8
Due in 1 year through 5 years	543.4		543.8
Total	$	1,446.4	$	1,446.6

As of October 31, 2015 and January 31, 2015, Autodesk had no material securities in a continuous unrealized loss position for greater than twelve months.

As of October 31, 2015 and January 31, 2015, Autodesk had $74.2 million and $52.6 million, respectively, in direct investments in privately held companies accounted for under the cost method, which are periodically assessed for other-than-temporary impairment. Autodesk estimates fair value of its cost method investments considering available information such as pricing in recent rounds of financing, current cash positions, earnings and cash flow forecasts, recent operational performance and any other readily available market data.

If Autodesk determines that an other-than-temporary impairment has occurred, Autodesk writes down the investment to its fair value. During the nine months ended October 31, 2015, Autodesk recorded $0.2 million in other-than-temporary impairment on its privately held equity investments. During the nine months ended October 31, 2014, Autodesk recorded a $3.4 million other-than-temporary impairment on its privately held equity investments.

The sales or redemptions of “available-for-sale securities” during the nine months ended October 31, 2015 and 2014 resulted in gains of $0.3 million and $0.7 million, respectively. Gains and losses resulting from the sale or redemption of "available-for-sale securities" are recorded in “Interest and other expense, net” on the Company's Condensed Consolidated Statements of Operations.

Proceeds from the sale and maturity of marketable securities for the nine months ended October 31, 2015 and 2014 were $1.2 billion and $0.8 billion, respectively.

Derivative Financial Instruments

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

The bank counterparties to the derivative contracts potentially 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 generally enters into master netting arrangements, which reduce credit risk by permitting net settlement of transactions with the same counterparty. However, Autodesk does not have any master netting arrangements in place with collateral features.

Foreign currency contracts designated as cash flow hedges

Autodesk uses foreign currency contracts to reduce the exchange rate impact on a portion of the net revenue or operating expense of certain anticipated transactions. These contracts are designated and documented as cash flow hedges. The effectiveness of the cash flow hedge contracts is assessed quarterly using regression analysis as well as other timing and probability criteria. To receive cash flow hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge and the hedges are expected to be highly effective in offsetting changes to future cash flows on hedged transactions. The gross gains and losses on these hedges are included in “Accumulated other comprehensive 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 loss” to “Interest and other expense, net” in the Company's Condensed Consolidated Financial Statements at that time.

The net notional amounts of these contracts are presented net settled and were $328.3 million at October 31, 2015 and $336.6 million at January 31, 2015. Outstanding contracts are recognized as either assets or liabilities on the balance sheet at fair value. The majority of the net gain of $20.6 million remaining in “Accumulated other comprehensive loss” as of October 31, 2015 is expected to be recognized into earnings within the next twelve months.

Derivatives not designated as hedging instruments

Autodesk uses foreign currency contracts that are not designated as hedging instruments to reduce the exchange rate risk associated primarily with foreign currency denominated receivables and payables. These forward contracts are marked-to-market at the end of each fiscal quarter with gains and losses recognized as “Interest and other 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 net notional amounts of these foreign currency contracts are presented net settled and were $1.5 million at October 31, 2015 and $44.6 million at January 31, 2015.

In addition to these foreign currency contracts, Autodesk holds derivative instruments issued by privately held companies, which are not designated as hedging instruments. These derivatives consist of certain conversion options on the convertible debt securities held by Autodesk and an option to acquire a privately held company. These derivatives are recorded at fair value as of each balance sheet date and are recorded in “Other assets.” Changes in the fair values of these instruments are recognized in income as “Interest and other expense, net.”

Fair Value of Derivative Instruments

The fair values of derivative instruments in Autodesk’s Condensed Consolidated Balance Sheets were as follows as of October 31, 2015 and January 31, 2015:



	Balance Sheet Location	Fair Value at
	Balance Sheet Location	October 31, 2015		January 31, 2015
Derivative Assets
Foreign currency contracts designated as cash flow hedges	Prepaid expenses and other current assets (1)	$	2.9	$	20.4
Derivatives not designated as hedging instruments	Prepaid expenses and other current assets and Other assets	1.3		0.9
Total derivative assets		$	4.2	$	21.3
Derivative Liabilities
Foreign currency contracts designated as cash flow hedges	Other accrued liabilities (2)	$	2.0	$	5.4
Derivatives not designated as hedging instruments	Other accrued liabilities	0.6		—
Total derivative liabilities		$	2.6	$	5.4

____________________


(1)	Considering Autodesk's master netting arrangements, these contracts are presented net settled. The gross balance is $6.4 million and $23.8 million at October 31, 2015 and January 31, 2015, respectively.


(2)	Considering Autodesk's master netting arrangements, these contracts are presented net settled. The gross balance is $5.5 million and $8.7 million at October 31, 2015 and January 31, 2015, respectively.

The effects of derivatives designated as hedging instruments on Autodesk’s Condensed Consolidated Statements of Operations were as follows for the three and nine months ended October 31, 2015 and 2014 (amounts presented include any income tax effects):



	Foreign Currency Contracts
	Three Months Ended October 31,						Nine Months Ended October 31,
	2015			2014			2015			2014
Amount of (loss) gain recognized in accumulated other comprehensive income on derivatives (effective portion)	$	(5.0	)	$	22.3		$	1.7		$	22.5
Amount and location of gain (loss) reclassified from accumulated other comprehensive income into income (effective portion)
Net revenue	$	9.5		$	2.1		$	31.8		$	4.6
Operating expenses	(2.4		)	(0.8		)	(7.9		)	(1.7		)
Total	$	7.1		$	1.3		$	23.9		$	2.9
Amount and location of (loss) gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)
Interest and other expense, net	$	(0.2	)	$	0.1		$	(0.5	)	$	0.3

The effects of derivatives not designated as hedging instruments on Autodesk’s Condensed Consolidated Statements of Operations were as follows for the three and nine months ended October 31, 2015 and 2014 (amounts presented include any income tax effects):



	Three Months Ended October 31,						Nine Months Ended October 31,
	2015			2014			2015			2014
Amount and location of loss recognized in income on derivatives (1)
Interest and other expense, net	$	(2.5	)	$	(4.5	)	$	(1.8	)	$	(15.1	)

____________________


(1)	Prior period balances have been adjusted to conform to current period presentation.

Stock-based Compensation Expense

9 Months Ended

Oct. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based Compensation Expense

Stock Plans

As of October 31, 2015, Autodesk maintained two active stock plans for the purpose of granting equity awards to employees and to non-employee members of Autodesk’s Board of Directors: the 2012 Employee Stock Plan (“2012 Employee Plan”), which is available only to employees, and the Autodesk 2012 Outside Directors’ Plan (“2012 Directors' Plan”), which is available only to non-employee directors. Additionally, there are two 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 2012 Employee Plan was approved by Autodesk's stockholders and became effective on January 6, 2012. On June 10, 2015, Autodesk's stockholders approved an amendment to the 2012 Employee Plan, which increased the number of shares reserved for issuance under the plan by 12.5 million shares. The 2012 Employee Plan replaced the 2008 Employee Stock Plan, as amended ("2008 Plan"), and no further equity awards may be granted under the 2008 Plan. The 2012 Employee Plan reserves up to 45.1 million shares, which includes 39.1 million shares reserved under the 2012 Employee Plan, and up to 6.0 million shares forfeited under certain prior employee stock plans during the life of the 2012 Employee Plan. The 2012 Employee Plan permits the grant of stock options, restricted stock units and restricted stock awards. Each restricted stock unit or restricted stock award granted will be counted against the shares authorized for issuance under the 2012 Employee Plan as 1.79 shares. If a granted option, restricted stock unit or restricted stock award expires or becomes unexercisable for any reason, the unpurchased or forfeited shares that were granted may be returned to the 2012 Employee Plan and may become available for future grant under the 2012 Employee Plan. As of October 31, 2015, 27.7 million shares subject to options or restricted stock unit awards have been granted under the 2012 Employee Plan. Options and restricted stock units that were granted under the 2012 Employee Plan vest over periods ranging from immediately upon grant to over a three-year period and options expire 10 years from the date of grant. The 2012 Employee Plan will expire on June 30, 2022. At October 31, 2015, 19.8 million shares were available for future issuance under the 2012 Employee Plan.

The 2012 Directors' Plan was approved by Autodesk's stockholders and became effective on January 6, 2012. The 2012 Directors' Plan replaced the 2010 Outside Directors' Stock Plan, as amended. The 2012 Directors' Plan permits the grant of stock options, restricted stock units and restricted stock awards to non-employee members of Autodesk’s Board of Directors. Each restricted stock unit or restricted stock award granted will be counted against the shares authorized for issuance under the 2012 Directors' Plan as 2.11 shares. As of October 31, 2015, 0.7 million shares subject to restricted stock units have been granted under the 2012 Directors' Plan. Restricted stock units that were granted under the 2012 Directors' Plan vest over one to three years from the date of grant. On March 12, 2015, the Board reduced the number of shares reserved for issuance under the 2012 Directors' Plan by 0.9 million shares, so that 1.7 million shares are now reserved for issuance under the 2012 Directors' Plan. The 2012 Directors' Plan will expire on June 30, 2022. At October 31, 2015, 1.0 million shares were available for future issuance under the 2012 Directors' Plan.

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

Stock Options:

A summary of stock option activity for the nine months ended October 31, 2015 is as follows:



	Number of Shares		Weighted average exercise price per share		Weighted average remaining contractual term	Aggregate Intrinsic Value (2)
	(in millions)				(in years)	(in millions)
Options outstanding at January 31, 2015	2.7		$	34.46
Granted (1)	—		—
Exercised	(0.7	)	31.43
Canceled/Forfeited	—		—
Options vested, exercisable and outstanding at October 31, 2015	2.0		$	35.63	3.8	$	38.4
Options available for grant at October 31, 2015	20.8

_______________


(1)	Autodesk did not grant stock options in the nine months ended October 31, 2015.


(2)	Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $55.19 per share as of October 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.

As of October 31, 2015, compensation cost related to stock options has been fully recognized.

The following table summarizes information about the pre-tax intrinsic value of options exercised during the three and nine months ended October 31, 2015 and 2014:



	Three Months Ended October 31,				Nine Months Ended October 31,
	2015		2014		2015		2014
Pre-tax intrinsic value of options exercised (1)	$	2.6	$	10.3	$	20.0	$	54.5

_______________


(1)	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 following table summarizes information about options vested, exercisable and outstanding at October 31, 2015:



	Number of Shares (in millions)	Weighted average contractual life (in years)	Weighted average exercise price		Aggregate intrinsic value (1) (in millions)
Range of per-share exercise prices:
$12.31 - $29.49	0.7		$	24.62
$29.50 - $41.62	0.8		39.68
$42.39 - $43.81	0.5		43.80
Options vested, exercisable and outstanding	2.0	3.8	$	35.63	$	38.4

_______________


(1)	Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $55.19 per share as of October 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.

These options will expire if not exercised at specific dates ranging through September 2022.

Restricted Stock Units:

A summary of restricted stock unit activity for the nine months ended October 31, 2015 is as follows:



	Unvested Restricted Stock Units		Weighted average grant date fair value per share
	(in thousands)
Unvested restricted stock units at January 31, 2015	7,801.3		$	48.46
Granted	3,268.8		50.42
Vested	(2,949.1	)	44.61
Canceled/Forfeited	(364.6	)	49.86
Performance Adjustment (1)	34.6		54.92
Unvested restricted stock units at October 31, 2015	7,791.0		$	50.60

_______________


(1)	Based on Autodesk's financial results for fiscal 2015, 2014 and 2013 performance period. The performance stock units were earned at 113.8%, 65.8%, and 92.3% of the target award, respectively. The vesting of the 2013 performance stock units was subject to the holders satisfying the remaining service condition of the awards, which ended in March 2015.

For the restricted stock units granted during the nine months ended October 31, 2015 and 2014, the weighted average grant date fair value was $50.42 and $52.89, respectively. The fair value of the shares vested during the nine months ended October 31, 2015 and 2014 was $156.6 million and $110.5 million, respectively.

During the nine months ended October 31, 2015, Autodesk granted 2.8 million restricted stock units. The restricted stock units vest over periods ranging from immediately upon grant to a pre-determined date that is typically within three years from 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 is primarily expensed ratably over the vesting period. Autodesk recorded stock-based compensation expense related to restricted stock units of $37.9 million and $103.7 million during the three and nine months ended October 31, 2015, respectively. Autodesk recorded stock-based compensation expense related to restricted stock units of $31.2 million and $82.1 million during the three and nine months ended October 31, 2014, respectively. As of October 31, 2015, total compensation cost not yet recognized of $250.6 million related to non-vested restricted stock units is expected to be recognized over a weighted average period of 1.8 years. At October 31, 2015, the number of restricted stock units granted but unvested was 7.0 million.

During the nine months ended October 31, 2015, Autodesk granted 0.4 million performance restricted stock units (“PSUs”) for which the ultimate number of shares earned is determined based on the achievement of performance criteria at the end of the stated service and performance period. The performance criteria for these grants are based upon billings and subscriptions goals adopted by the Compensation and Human Resource Committee, as well as total stockholder return compared against the S&P Computer Software Select Index (“Relative TSR”). Each PSU covers a three year period:


•	Up to one third of the PSUs may vest following year one, depending upon the achievement of the billings and subscriptions goals for year one as well as 1-year Relative TSR (covering year one).


•	Up to one third of the PSUs may vest following year two, depending upon the achievement of the billings and subscriptions goals for year two as well as 2-year Relative TSR (covering years one and two).


•	Up to one third of the PSUs may vest following year three, depending upon the achievement of the billings and subscriptions goals for year three as well as 3-year Relative TSR (covering years one, two and three).

PSUs 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. Autodesk has determined the grant-date fair value for these awards using a Monte Carlo simulation model since the awards are subject to a market condition. The fair value of the PSUs is expensed using the accelerated attribution over the vesting period. Autodesk recorded stock-based compensation expense related to PSUs of $5.7 million and $17.2 million for the three and nine months ended October 31, 2015, respectively. Autodesk recorded stock-based compensation expense related to PSUs of $4.9 million and $12.7 million during the three and nine months ended October 31, 2014, respectively. As of October 31, 2015, total compensation cost not yet recognized of $9.6 million related to non-vested performance restricted stock units, is expected to be recognized over a weighted average period of 1.1 years. At October 31, 2015, the number of PSUs granted but not vested was 0.8 million.

1998 Employee Qualified Stock Purchase Plan (“ESPP”)

Under Autodesk’s ESPP, 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 no less than 85% of fair market value as defined in the ESPP. At October 31, 2015, a total of 38.6 million shares were available for future issuance. This amount automatically increases on the first trading day of each fiscal year by an amount equal to the lesser of 10.0 million shares or 2% of the total of (1) outstanding shares plus (2) any shares repurchased by Autodesk during the prior fiscal year. Under the ESPP, the Company issues shares on the first trading day following March 31 and September 30 of each fiscal year. The ESPP expires during fiscal 2018.

Autodesk issued 1.0 million and 2.1 million shares under the ESPP during the three and nine months ended October 31, 2015, with an average price of $35.59 and $36.29 per share. During the three and nine months ended October 31, 2014, Autodesk issued 1.0 million and 2.1 million shares under the ESPP, at an average price of $34.19 and $33.91 per share. The weighted average grant date fair value of awards granted under the ESPP was $11.91 and $11.85 during the three and nine months ended October 31, 2015, calculated as of the award grant date using the Black-Scholes Merton (“BSM") option pricing model. The weighted average grant date fair value of awards granted under the ESPP during the three and nine months ended October 31, 2014, calculated as of the award grant date using the BSM option pricing model, was $15.44 and $15.14 per share.

Stock-based Compensation Expense

The following table summarizes stock-based compensation expense for the three and nine months ended October 31, 2015 and 2014, respectively, as follows:



	Three Months Ended October 31,
	2015		2014
Cost of license and other revenue	$	1.7	$	1.2
Cost of subscription	1.5		1.1
Marketing and sales	22.3		19.4
Research and development	17.5		14.7
General and administrative	7.2		6.7
Stock-based compensation expense related to stock awards and ESPP purchases	50.2		43.1
Tax benefit	—		(11.7		)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	50.2	$	31.4

	Nine Months Ended October 31,
	2015		2014
Cost of license and other revenue	$	4.4	$	3.2
Cost of subscription	4.1		2.9
Marketing and sales	61.3		51.0
Research and development	49.9		39.3
General and administrative	21.4		20.1
Stock-based compensation expense related to stock awards and ESPP purchases	141.1		116.5
Tax benefit	—		(31.3		)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	141.1	$	85.2

Stock-based Compensation Expense Assumptions

Autodesk determines the grant-date fair value of its share-based payment awards using a BSM option pricing model or the quoted stock price on the date of grant, unless the awards are subject to market conditions, in which case Autodesk uses a binomial-lattice model (e.g., Monte Carlo simulation model). The Monte Carlo simulation model utilizes multiple input variables to estimate the probability that market conditions will be achieved. Autodesk uses the following assumptions to estimate the fair value of stock-based awards:



	Three Months Ended October 31, 2015			Three Months Ended October 31, 2014
		Performance Stock Unit (1)	ESPP	Performance Stock Unit (1)	ESPP
Range of expected volatilities		N/A	29%	N/A	29 - 30%
Range of expected lives (in years)		N/A	0.5 - 2.0	N/A	0.5 - 2.0
Expected dividends		N/A	—%	N/A	—%
Range of risk-free interest rates		N/A	0.2 - 0.7%	N/A	0.0 - 0.6%
	Nine Months Ended October 31, 2015			Nine Months Ended October 31, 2014
		Performance Stock Unit	ESPP	Performance Stock Unit	ESPP
Range of expected volatilities		27%	28 - 29%	30%	29 - 33%
Range of expected lives (in years)		N/A	0.5 - 2.0	N/A	0.5 - 2.0
Expected dividends		—%	—%	—%	—%
Range of risk-free interest rates		0.2%	0.1 - 0.7%	0.1%	0.0 - 0.6%

_______________


(1)	Autodesk did not grant PSUs in the three months ended October 31, 2015 and 2014 that were subject to market conditions.

Autodesk estimates expected volatility for stock-based awards based on the average of the following two measures. The first is a measure of historical volatility in the trading market for the Company’s common stock, and the second is the implied volatility of traded forward call options to purchase shares of the Company’s common stock. The expected volatility for PSUs subject to market conditions includes the expected volatility of Autodesk's peer companies within the S&P Computer Software Select Index.

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

Autodesk does not currently pay, and does not anticipate paying in the foreseeable future, any cash dividends. Consequently, an expected dividend yield of zero is used in the BSM option pricing model and the Monte Carlo simulation model.

The risk-free interest rate used in the BSM option pricing model and the Monte Carlo simulation model for stock-based awards is the historical yield on U.S. Treasury securities with equivalent remaining lives.

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

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References+ Details

Income Tax

9 Months Ended

Oct. 31, 2015

Income Tax Disclosure [Abstract]

Income Tax

Autodesk's income tax expense was $21.3 million and $293.5 million for the three and nine months ended October 31, 2015, respectively, relative to a pre-tax loss of $22.5 million and pre-tax income of $0.2 million, respectively, for the same periods. For the nine months ended October 31, 2015, tax expense consists primarily of foreign taxes and changes to valuation allowances, including a $230.8 million valuation allowance against the Company’s U.S. federal and remaining state deferred tax assets recorded during the three months ended July 31, 2015.

Autodesk regularly assesses the need for a valuation allowance against its deferred tax assets. In making that assessment, Autodesk considers both positive and negative evidence related to the likelihood of realization of the deferred tax assets to determine, based on the weight of available evidence, whether it is more-likely-than-not that some or all of the deferred tax assets will not be realized. In evaluating the need for a valuation allowance, Autodesk considered recent cumulative losses in the United States arising from the Company's business model transition as a significant piece of negative evidence. As a result, Autodesk previously established a valuation allowance against the Company’s deferred tax assets in the three months ended July 31, 2015. In the course of preparing the consolidated financial statements for the three months ended October 31, 2015, Autodesk determined that it had understated income tax expense by $33.1 million for the three and six months ended July 31, 2015, primarily related to an error in the establishment of the valuation allowance, which had been understated at July 31, 2015. Autodesk evaluated the materiality of the error, quantitatively and qualitatively, and concluded it was not material to the Company’s condensed consolidated financial statements as of July 31, 2015 or for the three and six month periods ended July 31, 2015.

However, in light of the significance of a correction of the error to the results for the three months ended October 31, 2015, Autodesk chose to correct the error by revising the previously reported results for the three and six months ended July 31, 2015, to include the additional $33.1 million of income tax expense primarily related to the establishment of the valuation allowance.

The following table summarizes the impact of adjusting the condensed consolidated income statement balances presented for the three and six months ended July 31, 2015:



	As previously reported						As adjusted
(In millions, except per share data)	Three Months Ended July 31, 2015			Adjustment			Three Months Ended July 31, 2015
Provision for income tax	$	(236.4	)	$	(33.1	)	$	(269.5	)
Net loss	(235.5		)	(33.1		)	(268.6		)
Basic and diluted net loss per share	$	(1.04	)	$	(0.14	)	$	(1.18	)

	Six Months Ended July 31, 2015			Adjustment			Six Months Ended July 31, 2015
Provision for income tax	$	(239.1	)	$	(33.1	)	$	(272.2	)
Net loss	(216.4		)	(33.1		)	(249.5		)
Basic and diluted net loss per share	$	(0.95	)	$	(0.15	)	$	(1.10	)

The following table summarizes the impact of adjusting the Condensed Consolidated Balance Sheet balances as of July 31, 2015:



	As previously reported					As adjusted
(In millions)	July 31, 2015		Adjustment			July 31, 2015
Current deferred tax liabilities (1)	$	8.3	$	1.2		$	9.5
Accrued income taxes	52.3		(29.4		)	22.9
Long term deferred tax liabilities	28.9		25.1			54.0
Long term income tax payable	124.0		36.2			160.2
Retained earnings	$	164.4	$	(33.1	)	$	131.3

_______________


(1)	Included in "Other accrued liabilities" in the accompanying Condensed Consolidated Balance Sheets.

The cumulative valuation allowances against U.S. federal and state deferred tax were $312.3 million and $26.7 million at October 31, 2015 and January 31, 2015, respectively.

As of October 31, 2015, the Company had $254.0 million of gross unrecognized tax benefits, excluding interest, of which approximately $236.6 million represents the amount of unrecognized tax benefits that would impact the effective tax rate, if recognized. However, this rate impact would be offset to the extent that recognition of unrecognized tax benefits currently presented as a reduction of deferred tax assets would increase the valuation allowance. 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.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References+ Details

Acquisitions

9 Months Ended

Oct. 31, 2015

Business Combinations [Abstract]

Acquisitions

During the nine months ended October 31, 2015, Autodesk completed several business combinations and technology acquisitions for total cash consideration of approximately $105.0 million. Pro forma results of operations have not been presented because the effects of the acquisitions, individually and in the aggregate, were not material to Autodesk’s Condensed Consolidated Financial Statements.

For acquisitions accounted for as business combinations, Autodesk recorded the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition. The fair values assigned to the identifiable intangible assets acquired were based on estimates and assumptions determined by management. Autodesk recorded the excess of consideration transferred over the aggregate fair values as goodwill. The goodwill recorded is primarily attributable to synergies expected to arise after the acquisitions.

The following table summarizes the fair value of the assets acquired and liabilities assumed by major class for the business combinations and technology acquisitions completed during the nine months ended October 31, 2015:



	October 31, 2015
Developed technologies	$	26.8
Customer relationships and other non-current intangible assets	12.8
Trade name	4.6
Goodwill	63.4
Deferred revenue (current and non-current)	(0.7		)
Deferred tax liability	(2.4		)
Net tangible assets	0.5
Total	$	105.0

For certain business combinations, the allocation of purchase price consideration to certain assets and liabilities is not yet finalized. For the items not yet finalized, Autodesk's estimates and assumptions are subject to change within the measurement period (up to one year from the acquisition date). The primary areas of the preliminary purchase price allocation that are not yet finalized are amounts for tax assets and liabilities, pending finalization of estimates and assumptions in respect of certain tax aspects of the transaction and residual goodwill.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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+ Details

Other Intangible Assets, Net

9 Months Ended

Oct. 31, 2015

Finite-Lived Intangible Assets, Net [Abstract]

Other Intangible Assets, Net

Other intangible assets including developed technologies, customer relationships, trade names, patents, user lists and the related accumulated amortization were as follows:



	October 31, 2015			January 31, 2015
Developed technologies, at cost	$	565.3		$	538.4
Customer relationships, trade names, patents, and user list, at cost (1)	365.9			348.9
Other intangible assets, at cost (2)	931.2			887.3
Less: Accumulated amortization	(777.6		)	(715.4		)
Other intangible assets, net	$	153.6		$	171.9

_______________


(1)	Included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.


(2)	Includes the effects of foreign currency translation.

Goodwill

9 Months Ended

Oct. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

The change in the carrying amount of goodwill by reporting unit during the nine months ended October 31, 2015 is as follows:



	Platform Solutions and Emerging Business			Architecture, Engineering and Construction			Manufacturing			Media and Entertainment			Delcam (1)			Total
Balances as of January 31, 2015
Goodwill	$	327.5		$	427.0		$	422.7		$	245.2		$	183.0		$	1,605.4
Accumulated impairment losses	—			—			—			(149.2		)	—			(149.2		)
	327.5			427.0			422.7			96.0			183.0			1,456.2
Addition arising from other acquisitions	32.2			4.2			16.6			10.4			—			63.4
Effect of foreign currency translation, purchase accounting adjustments, and other	(0.5		)	(2.0		)	(1.2		)	0.1			(1.0		)	(4.6		)
Balances as of October 31, 2015
Goodwill	359.2			429.2			438.1			255.7			182.0			1,664.2
Accumulated impairment losses	—			—			—			(149.2		)	—			(149.2		)
	$	359.2		$	429.2		$	438.1		$	106.5		$	182.0		$	1,515.0

_______________


(1)	Delcam is a separate reporting unit within our Manufacturing ("MFG") operating segment.

Goodwill consists of the excess of consideration transferred over the fair value of net assets acquired in business combinations. Autodesk assigns goodwill to the reporting unit associated with each business combination, and tests goodwill for impairment annually in its fourth fiscal quarter or more often if circumstances indicate a potential impairment. The company has established reporting units based upon its current reporting structure.

When goodwill is assessed for impairment, Autodesk has the option to perform an assessment of qualitative factors of impairment (“optional assessment”) prior to necessitating a two-step quantitative impairment test. Should the optional assessment be used for any given fiscal year, qualitative factors to consider include cost factors; financial performance; legal, regulatory, contractual, political, business, or other factors; entity specific factors; industry and market considerations, macroeconomic conditions, and other relevant events and factors affecting the reporting unit. If, after assessing the totality of events or circumstances, it is more likely than not that the fair value of the reporting unit is greater than its carrying value, then performing the two-step impairment test is unnecessary.

Therefore, the two-step quantitative impairment test is necessary when either Autodesk does not use the optional assessment or, as a result of the optional assessment, it is not more likely than not that the fair value of the reporting unit is greater than its carrying value. In performing the two-step impairment test, Autodesk uses discounted cash flow models which include assumptions regarding projected cash flows. 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. As changes in business conditions and assumptions occur, Autodesk may be required to record impairment charges. The process of evaluating the potential impairment of goodwill is subjective and requires significant judgment at many points during the analysis. The value of Autodesk’s goodwill could also be impacted by future adverse changes such as: (i) declines in Autodesk’s actual financial results, (ii) a sustained decline in Autodesk’s market capitalization, (iii) significant slowdown in the worldwide economy or the industries Autodesk serves, or (iv) changes in Autodesk’s business strategy or internal financial results forecasts.

Deferred Compensation	9 Months Ended
Deferred Compensation	Oct. 31, 2015
Deferred Compensation Arrangements [Abstract]
Deferred Compensation	Deferred Compensation At October 31, 2015, Autodesk had marketable securities totaling $1.5 billion, of which $44.0 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 $44.0 million at October 31, 2015, of which $5.2 million was classified as current and $38.8 million was classified as non-current liabilities. The total related deferred compensation liability at January 31, 2015 was $40.3 million, of which $5.3 million was classified as current and $35.0 million was classified as non-current liabilities. The securities are recorded in the Condensed Consolidated Balance Sheets under the current portion of "Marketable securities". The current and non-current portions of the liability are recorded in the Condensed Consolidated Balance Sheets under “Accrued compensation” and “Other liabilities,” respectively.

- Definition

The entire disclosure for compensation costs, including compensated absences accruals, compensated absences liability, deferred compensation arrangements and income statement compensation items. Deferred compensation arrangements may include a description of an arrangement with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares (units) issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability.

+ References+ Details

Computer Equipment, Software, Furniture and Leasehold Improvements, Net

9 Months Ended

Oct. 31, 2015

Property, Plant and Equipment [Abstract]

Computer Equipment, Software, Furniture and Leasehold Improvements, Net

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



	October 31, 2015			January 31, 2015
Computer hardware, at cost	$	198.9		$	194.0
Computer software, at cost	79.8			84.9
Leasehold improvements, land and buildings, at cost	187.5			176.3
Furniture and equipment, at cost	57.2			53.0
	523.4			508.2
Less: Accumulated depreciation	(368.1		)	(349.0		)
Computer software, hardware, leasehold improvements, furniture and equipment, net	$	155.3		$	159.2

- Definition

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

+ References+ Details

Borrowing Arrangements	9 Months Ended
Borrowing Arrangements	Oct. 31, 2015
Line of Credit Facility [Abstract]
Borrowing Arrangements	Borrowing Arrangements In June 2015, Autodesk issued $450.0 million aggregate principal amount of 3.125% notes due June 15, 2020 and $300.0 million aggregate principal amount of 4.375% notes due June 15, 2025 (collectively, the “2015 Notes”). Net of a discount of $1.7 million and issuance costs of $6.3 million, Autodesk received net proceeds of $742.0 million from issuance of the 2015 Notes. Both the discount and issuance costs are being amortized to interest expense over the respective terms of the 2015 Notes using the effective interest method. The proceeds of the 2015 Notes are available for general corporate purposes. Autodesk may redeem the 2015 Notes at any time, subject to a make whole premium. In addition, upon the occurrence of certain change of control triggering events, Autodesk may be required to repurchase the 2015 Notes at a price equal to 101% of their principal amount, plus accrued and unpaid interest to the date of repurchase. The 2015 Notes contain restrictive covenants that limit Autodesk's ability to create certain liens, to enter into certain sale and leaseback transactions and to consolidate or merge with, or convey, transfer or lease all or substantially all of its assets, subject to important qualifications and exceptions. Based on quoted market prices, the fair value of the 2015 Notes was approximately $754.1 million as of October 31, 2015. In December 2012, Autodesk issued $400.0 million aggregate principal amount of 1.95% notes due December 15, 2017 and $350.0 million aggregate principal amount of 3.6% notes due December 15, 2022 (collectively, the “2012 Notes”). Autodesk received net proceeds of $739.3 million from issuance of the 2012 Notes, net of a discount of $4.5 million and issuance costs of $6.1 million. Both the discount and issuance costs are being amortized to interest expense over the respective terms of the 2012 Notes using the effective interest method. The proceeds of the 2012 Notes are available for general corporate purposes. Autodesk may redeem the 2012 Notes at any time, subject to a make whole premium. In addition, upon the occurrence of certain change of control triggering events, Autodesk may be required to repurchase the 2012 Notes at a price equal to 101% of their principal amount, plus accrued and unpaid interest to the date of repurchase. The 2012 Notes contain restrictive covenants that limit Autodesk's ability to create certain liens, to enter into certain sale and leaseback transactions and to consolidate or merge with, or convey, transfer or lease all or substantially all of its assets, subject to important qualifications and exceptions. Based on quoted market prices, the fair value of the 2012 Notes was approximately $749.7 million as of October 31, 2015. Autodesk’s line of credit facility permits unsecured short-term borrowings of up to $400.0 million, with an option to request an increase in the amount of the credit facility by up to an additional $100.0 million, and is available for working capital or other business needs. This credit agreement contains customary covenants that could restrict the imposition of liens on Autodesk’s assets, and restrict the Company’s ability to incur additional indebtedness or make dispositions of assets if Autodesk fails to maintain the financial covenants. The financial covenants consist of a leverage ratio, and an interest coverage ratio. The line of credit is syndicated with various financial institutions, including Citibank, N.A., an affiliate of Citigroup, which is one of the lead lenders and an agent. In May 2015, Autodesk amended and restated the credit agreement to extend the facility's maturity date from May 2018 to May 2020 and to amend the financial covenants. At October 31, 2015, Autodesk was in compliance with the credit facility's covenants and had no outstanding borrowings on this line of credit.

Restructuring

9 Months Ended

Oct. 31, 2015

Restructuring and Related Activities [Abstract]

Restructuring

During fiscal 2014, the Board of Directors approved a world-wide restructuring plan in order to re-balance staffing levels to better align them with the evolving needs of the business. The restructuring plan included a reduction of approximately 85 positions and the consolidation of four leased facilities, with a total cost of approximately $15.0 million ("Fiscal 2014 Plan"). By July 31, 2014, the personnel and facilities related actions included in this restructuring plan were substantially complete.

Autodesk did not record restructuring charges during the nine months ended October 31, 2015. The following table sets forth the restructuring activities during the nine months ended October 31, 2015:



	Balance at January 31, 2015		Additions		Payments			Adjustments (1)		Balance at October 31, 2015
Fiscal 2014 Plan
Lease termination and asset costs	$	1.4	$	—	$	(0.3	)	$	0.2	$	1.3
Total	$	1.4	$	—	$	(0.3	)	$	0.2	$	1.3
Current portion (2)	$	0.6								$	0.8
Non-current portion (2)	0.8									0.5
Total	$	1.4								$	1.3

____________________


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


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

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References+ Details

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Oct. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	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 its products or services. Autodesk accrues for known indemnification issues if a loss is probable and can be reasonably estimated. Historically, costs related to these indemnifications have not been significant, and because potential future costs are highly variable, Autodesk is unable to estimate the maximum potential impact of these indemnifications on its future results of operations. In connection with the purchase, sale or license of assets or businesses with third parties, Autodesk has entered into or assumed customary indemnification agreements related to the assets or businesses purchased, sold or licensed. Historically, costs related to these indemnifications have not been significant, and because potential future costs are highly variable, Autodesk is unable to estimate the maximum potential impact of these indemnifications on its future results of operations. As permitted under Delaware law, Autodesk has agreements whereby it indemnifies its officers and directors for certain events or occurrences while the officer or director is, or was, serving at Autodesk’s request in such capacity. The maximum potential amount of future payments Autodesk could be required to make under these indemnification agreements is unlimited; however, Autodesk has directors’ and officers’ liability insurance coverage that is intended to reduce its financial exposure and may enable Autodesk to recover a portion of any future amounts paid. Autodesk believes the estimated fair value of these indemnification agreements in excess of applicable insurance coverage is minimal. Legal Proceedings Autodesk is involved in a variety of claims, suits, investigations and proceedings in the normal course of business activities including claims of alleged infringement of intellectual property rights, commercial, employment, piracy prosecution, business practices and other matters. In the Company’s opinion, resolution of pending matters is not expected to have a material adverse impact on its consolidated results of operations, cash flows or its financial position. Given the unpredictable nature of legal proceedings, there is a reasonable possibility that an unfavorable resolution of one or more such proceedings could in the future materially affect the Company’s results of operations, cash flows or financial position in a particular period, however, based on the information known by the Company as of the date of this filing and the rules and regulations applicable to the preparation of the Company’s financial statements, any such amount is either immaterial or it is not possible to provide an estimated amount of any such potential loss.

- Definition

The entire disclosure for commitments and contingencies.

+ References+ Details

Common Stock Repurchase Program	9 Months Ended
Common Stock Repurchase Program	Oct. 31, 2015
Class of Stock Disclosures [Abstract]
Common Stock Repurchase Program	Common Stock Repurchase Program Autodesk has a stock repurchase program that is used to offset dilution from the issuance of stock under the Company’s employee stock plans and for such other purposes as may be in the interests of Autodesk and its stockholders. Stock repurchases have the effect of returning excess cash generated from the Company’s business to stockholders. During the three and nine months ended October 31, 2015, Autodesk repurchased and retired 3.2 million and 6.9 million shares at an average repurchase price of $46.33 and $51.59 per share, respectively. Common stock and additional paid-in capital and retained earnings were reduced by $72.2 million and $77.8 million, respectively, during the three months ended October 31, 2015. Common stock and additional paid-in capital and retained earnings were reduced by $161.3 million and $196.4 million, respectively, during the nine months ended October 31, 2015. At October 31, 2015, 7.9 million shares remained available for repurchase under the repurchase program approved by the Board of Directors. During the nine months ended October 31, 2015, Autodesk repurchased its common stock through open market purchases. The number of shares acquired and the timing of the purchases are based on several factors, including general market and economic conditions, the number of employee stock option exercises and stock issuances, the trading price of Autodesk common stock, cash on hand and available in the United States, cash requirements for acquisitions, and Company defined trading windows.

Accumulated Other Comprehensive Loss

9 Months Ended

Oct. 31, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss, net of taxes, consisted of the following at October 31, 2015:



	Net Unrealized Gains (Losses) on Derivative Instruments			Net Unrealized Gains (Losses) on Available-for-Sale Securities			Defined Benefit Pension Components			Foreign Currency Translation Adjustments			Total
Balances, January 31, 2015	$	42.8		$	1.6		$	(23.7	)	$	(74.0	)	$	(53.3	)
Other comprehensive income (loss) before reclassifications	2.4			(0.7		)	0.4			(10.7		)	(8.6		)
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss	(23.9		)	(1.1		)	0.9			—			(24.1		)
Tax effects	(0.7		)	0.2			—			—			(0.5		)
Net current period other comprehensive (loss) income	(22.2		)	(1.6		)	1.3			(10.7		)	(33.2		)
Balances, October 31, 2015	$	20.6		$	—		$	(22.4	)	$	(84.7	)	$	(86.5	)

Reclassifications related to gains and losses on available-for-sale securities are included in Interest and other expense, net. Refer to "Note 4: Financial Instruments" for the amount and location of reclassifications related to derivative instruments. Reclassifications of the defined benefit pension components are included in the computation of net periodic benefit cost. For further information, see the "Retirement Benefit Plans" note in Part II, Item 8 of our Annual Report on Form 10-K for the year ended January 31, 2015.

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 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.

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Net (Loss) Income Per Share

9 Months Ended

Oct. 31, 2015

Earnings Per Share [Abstract]

Net (Loss) Income Per Share

Basic net (loss) income per share is computed using the weighted average number of shares of common stock outstanding for the period, excluding stock options and restricted stock units. Diluted net (loss) income per share is based upon the weighted average number of 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 (loss) income per share amounts:



	Three Months Ended October 31,					Nine Months Ended October 31,
	2015			2014		2015			2014
Numerator:
Net (loss) income	$	(43.8	)	$	10.7	$	(293.3	)	$	70.3
Denominator:
Denominator for basic net (loss) income per share—weighted average shares	225.3			226.9		226.5			227.1
Effect of dilutive securities (1)	—			4.6		—			4.8
Denominator for dilutive net (loss) income per share	225.3			231.5		226.5			231.9
Basic net (loss) income per share	$	(0.19	)	$	0.05	$	(1.29	)	$	0.31
Diluted net (loss) income per share	$	(0.19	)	$	0.05	$	(1.29	)	$	0.30

____________________


(1)	The effect of dilutive securities of 3.4 million and 4.0 million shares for the three and nine months ended October 31, 2015, respectively, have been excluded from the calculation of diluted net (loss) income per share as those shares would have been anti-dilutive due to the net (loss) incurred during those periods.

The computation of diluted net (loss) 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 and nine months ended October 31, 2015, 0.6 million and 0.1 million potentially anti-dilutive shares, respectively, were excluded from the computation of diluted net (loss) income per share. For both the three and nine months ended October 31, 2014, no potentially anti-dilutive shares were excluded from the computation of diluted net income per share.

- Definition

The entire disclosure for earnings per share.

+ References+ Details

Segments

9 Months Ended

Oct. 31, 2015

Segment Reporting [Abstract]

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: AEC, MFG, Platform Solutions and Emerging Business ("PSEB"), and Media and Entertainment ("M&E"). Autodesk has no material inter-segment revenue.

The AEC, MFG, and PSEB 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. Autodesk's 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.

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 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 Building Design Suites, Autodesk Infrastructure Design Suites, AutoCAD Civil 3D, AutoCAD Map 3D, and AutoCAD Architecture.

MFG provides the manufacturers in automotive and transportation, industrial machinery, consumer products and building products with comprehensive digital prototyping solutions that bring 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 Product Design Suites, Autodesk Delcam products, AutoCAD Mechanical, and Autodesk Moldflow products.

PSEB includes Autodesk’s design product, AutoCAD. Autodesk’s AutoCAD product is a platform product that underpins the Company’s 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 AutoCAD and AutoCAD LT, the AutoCAD Design Suite and many other design products, including consumer design products, as well as from sales of licenses of other Autodesk's design products.

M&E consists of two product groups: Animation, including design visualization, and Creative Finishing. Animation products, such as Autodesk Maya, Autodesk 3ds Max, Autodesk Entertainment Creation Suites, and Autodesk Shotgun products provide tools for digital sculpting, modeling, animation, effects, rendering and compositing, for design visualization, visual effects and games production. M&E products are also included in a number of PSEB, AEC, and MFG focused suites. Creative Finishing products, such as Autodesk Flame, Autodesk Smoke, Autodesk Flare, and Autodesk Lustre, 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 Autodesk's Annual Report on Form 10-K for the fiscal year ended January 31, 2015. 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 9, “Goodwill.”

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



	Three Months Ended October 31,						Nine Months Ended October 31,
	2015			2014			2015			2014
Net revenue:
Architecture, Engineering and Construction	$	224.9		$	217.1		$	695.0		$	630.5
Manufacturing	174.9			169.7			530.7			485.2
Platform Solutions and Emerging Business	160.9			188.4			510.3			607.8
Media and Entertainment	39.1			42.8			119.8			124.1
	$	599.8		$	618.0		$	1,855.8		$	1,847.6
Gross profit:
Architecture, Engineering and Construction	$	202.0		$	194.3		$	628.5		$	566.0
Manufacturing	155.2			152.8			464.5			437.0
Platform Solutions and Emerging Business	135.9			167.3			437.7			543.6
Media and Entertainment	30.5			32.1			94.9			93.3
Unallocated (1)	(14.8		)	(14.5		)	(45.6		)	(44.9		)
	$	508.8		$	532.0		$	1,580.0		$	1,595.0

_______________


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

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



	Three Months Ended October 31,				Nine Months Ended October 31,
	2015		2014		2015		2014
Net revenue:
Americas
U.S.	$	195.6	$	189.3	$	589.7	$	543.4
Other Americas	40.2		41.5		125.8		116.4
Total Americas	235.8		230.8		715.5		659.8
Europe, Middle East and Africa	225.1		238.2		696.2		707.2
Asia Pacific
Japan	49.0		58.0		164.8		215.1
Other Asia Pacific	89.9		91.0		279.3		265.5
Total Asia Pacific	138.9		149.0		444.1		480.6
Total net revenue	$	599.8	$	618.0	$	1,855.8	$	1,847.6

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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

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-Name Accounting Standards Codification

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+ Details

Subsequent Events	9 Months Ended
Subsequent Events	Oct. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	On September 23, 2015, Autodesk entered into a share purchase agreement with FIT AG (“FIT”) to acquire all of the outstanding shares of netfabb GmbH (“netfabb”) for €39.6 million (approximately $42.5 million) cash consideration. Autodesk simultaneously entered into an investment agreement with FIT for Autodesk to invest €25.5 million (approximately $27.4 million) cash to acquire an equity interest in FIT. The netfabb acquisition and FIT investment transactions closed on November 12, 2015. netfabb is a Germany-based provider of industrial grade additive manufacturing software solutions supporting most major 3D printers. FIT is a German-based provider of rapid prototyping and additive design and manufacturing services. netfabb will be integrated into, and the related goodwill will be assigned to, Autodesk’s PSEB segment. The initial accounting for this acquisition was not complete as of December 9, 2015, due to the timing of the acquisition. Autodesk used its non-U.S.-based cash for the transaction.

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Oct. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	The accompanying unaudited Condensed Consolidated Financial Statements of Autodesk, Inc. (“Autodesk,” “we,” “us,” “our,” or the “Company”) as of October 31, 2015, and for the three and nine months ended October 31, 2015 and 2014, have been prepared in accordance with U.S. generally accepted accounting principles ("GAAP") 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 GAAP for annual financial statements. In management’s opinion, Autodesk made all adjustments (consisting of normal, recurring and non-recurring adjustments) during the quarter that were considered necessary for the fair statement 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, 2015 are not necessarily indicative of the results for the entire fiscal year ending January 31, 2016, or for any other period. There have been no material changes to Autodesk's significant accounting policies as compared to the significant accounting policies disclosed in the Annual Report on Form 10-K for the fiscal year ended January 31, 2015. 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, 2015, filed on March 18, 2015.
Recently Issued Accounting Standards	Accounting Standards Adopted Effective in the third quarter of fiscal 2016, Autodesk elected to early adopt FABS's Accounting Standards Update No. 2015-16 ("ASU 2015-16") regarding ASC Topic 805 "Business Combinations: Simplifying the Accounting for Measurement-Period Adjustments." The amendments in ASU 2015-16 eliminate the requirement to restate prior period financial statements for measurement period adjustments. The amendments also require that the cumulative impact of a measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified. The amendments for ASU-2015-16 were prospectively applied and did not have a material impact on Autodesk's consolidated financial statements. Effective in the second quarter of fiscal 2016, Autodesk elected to early adopt FASB's Accounting Standards Update 2015-03 (“ASU 2015-03”) regarding Subtopic 835-30 “Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs.” The amendments in ASU 2015-03 require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The standard requires retrospective application and represents a change in accounting principle. The adoption of ASU 2015-03 resulted in a $4.1 million retrospective reduction of both our other assets and long term notes payable, net, as of January 31, 2015. Recently Issued Accounting Standards In November 2015, the FASB issued Accounting Standards Update No. 2015-17 ("ASU 2015-17") regarding ASC Topic 470 "Income Taxes: Balance Sheet Classification of Deferred Taxes." The amendments in ASU 2015-17 eliminate the requirement to bifurcate Deferred Taxes between current and non-current on the balance sheet and requires that deferred tax liabilities and assets be classified as noncurrent on the balance sheet. The amendments for ASU-2015-17 can be applied retrospectively or prospectively and early adoption is permitted. Autodesk does not expect ASU 2015-17 to have a material impact on Autodesk's consolidated financial statements. In May 2015, the FASB issued Accounting Standards Update No. 2015-07 ("ASU 2015-07") regarding ASC Topic 820 "Fair Value Measurement: Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent)." The amendments in ASU 2015-07 remove the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient. The amendments also limit certain disclosures to investments for which the entity has elected to measure at fair value using the net asset value per share practical expedient. The amendments in ASU 2015-07 are effective for annual and interim periods beginning after December 15, 2015. Early adoption is permitted. The amendments should be applied retrospectively by removing from the fair value hierarchy any investments for which fair value is measured using the net asset value per share practical expedient. Autodesk does not expect ASU 2015-07 to have a material impact on its consolidated financial statements. In April 2015, the FASB issued Accounting Standards Update No. 2015-05 ("ASU 2015-05") regarding Subtopic 350-40, “Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Fees Paid in a Cloud Computing Arrangement.” The amendments in this ASU provide guidance about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The amendments in ASU 2015-05 are effective for annual and interim periods beginning after December 15, 2015. Early adoption is permitted. The amendments in ASU 2015-05 may be applied either prospectively to all arrangements entered into or materially modified after the effective date or retrospectively. Autodesk does not expect ASU 2015-05 to have a material impact on its consolidated financial statements. In May 2014, the FASB issued Accounting Standards Update 2014-09 ("ASU 2014-09") regarding ASC Topic 606 “Revenue from Contracts with Customers.” ASU 2014-09 provides principles for recognizing revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. On July 7, 2015, the FASB amended ASU 2014-09 to defer the effective date by one year with early adoption permitted as of the original effective date. ASU 2014-09 will be effective for Autodesk’s fiscal year beginning February 1, 2018 unless we elect the earlier date of February 1, 2017. Autodesk is currently evaluating the accounting, transition and disclosure requirements of the standard and can neither estimate the current financial statement impact of adoption, nor the effective date election.

Financial Instruments (Tables)

9 Months Ended

Oct. 31, 2015

Investments, All Other Investments [Abstract]

Cost And Fair Value Of Financial Instruments Disclosure



			October 31, 2015
			Amortized Cost		Gross unrealized gains		Gross unrealized losses			Fair Value		Level 1		Level 2		Level 3
Cash equivalents (1):
	Certificates of deposit		$	323.4	$	—	$	—		$	323.4	$	323.4	$	—	$	—
	Custody cash deposit		40.0		—		—			40.0		40.0		—		—
	Commercial paper		153.6		—		—			153.6		—		153.6		—
	Corporate bonds		5.0		—		—			5.0		5.0		—		—
	Money market funds		283.5		—		—			283.5		—		283.5		—
	Agency bonds		3.0		—		—			3.0		3.0		—		—
	Municipal bonds		15.0		—		—			15.0		15.0		—		—
Marketable securities:
	Short-term available-for-sale
		U.S. government agency bonds	59.4		—		—			59.4		59.4		—		—
		Certificate of deposit	202.4		—		—			202.4		202.4		—		—
		Commercial paper	176.4		—		—			176.4		—		176.4		—
		Corporate bonds	374.1		0.1		(0.3		)	373.9		373.9		—		—
		Sovereign debt	17.4		—		—			17.4		—		17.4		—
		U.S. treasury bills	47.5		—		—			47.5		47.5		—		—
		Asset backed securities	3.4		—		—			3.4		—		3.4		—
		Municipal bonds	22.4		—		—			22.4		22.4		—		—
	Short-term trading securities
		Mutual funds	41.0		3.1		(0.1		)	44.0		44.0		—		—
	Long-term available-for-sale
		Agency bonds	59.6		0.1		—			59.7		59.7		—		—
		Corporate bonds	343.6		0.3		(0.9		)	343.0		343.0		—		—
		Municipal bonds	2.9		—		—			2.9		2.9		—		—
		U.S. government agency securities	74.6		0.1		(0.1		)	74.6		74.6		—		—
		Sovereign debt	24.5		—		—			24.5		—		24.5		—
		Asset backed securities	35.4		—		—			35.4		—		35.4		—
Convertible debt securities (2)			2.8		2.0		(1.1		)	3.7		—		—		3.7
Derivative contracts (3)			2.2		3.2		(3.8		)	1.6		—		1.1		0.5
		Total	$	2,313.1	$	8.9	$	(6.3	)	$	2,315.7	$	1,616.2	$	695.3	$	4.2

____________________


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


(2)	Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.


(3)	Included in “Prepaid expenses and other current assets,” “Other assets,” or “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.



			January 31, 2015
			Amortized Cost		Gross unrealized gains		Gross unrealized losses			Fair Value		Level 1		Level 2		Level 3
Cash equivalents (1):
	Certificates of deposit		$	258.6	$	—	$	—		$	258.6	$	258.6	$	—	$	—
	Custody cash deposit		141.5		—		—			141.5		141.5		—		—
	Commercial paper		161.0		—		—			161.0		—		161.0		—
	Corporate bond		11.5		—		—			11.5		11.5		—		—
	Money market funds		127.3		—		—			127.3		—		127.3		—
Marketable securities:
	Short-term available-for-sale
		Agency bond	37.9		—		—			37.9		37.9		—		—
		Corporate debt securities	148.0		0.1		(0.1		)	148.0		148.0		—		—
		Municipal bonds	29.2		0.1		—			29.3		29.3		—		—
		Certificates of deposit	101.9		—		—			101.9		101.9		—		—
		Commercial paper	258.4		—		—			258.4		—		258.4		—
	Short-term trading securities
		Mutual funds	36.9		3.4		—			40.3		40.3		—		—
	Long-term available-for-sale
		Agency bond	50.6		0.2		—			50.8		50.8		—		—
		Corporate debt securities	199.4		0.6		(0.2		)	199.8		199.8		—		—
		Municipal bonds	13.3		0.1		—			13.4		13.4		—		—
		U.S. government agency securities	8.9		0.1		—			9.0		9.0		—		—
Convertible debt securities (2)			4.7		2.5		(2.1		)	5.1		—		—		5.1
Derivative contracts (3)			3.5		19.5		(7.0		)	16.0		—		15.1		0.9
		Total	$	1,592.6	$	26.6	$	(9.4	)	$	1,609.8	$	1,042.0	$	561.8	$	6.0

____________________


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


(2)	Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.


(3)	Included in “Prepaid expenses and other current assets,” “Other assets,” or “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.

Fair Value, Assets Measured on Recurring Basis

A reconciliation of the change in Autodesk’s Level 3 items for the nine months ended October 31, 2015 was as follows:



	Fair Value Measurements Using Significant Unobservable Inputs
	(Level 3)
		Derivative Contracts			Convertible Debt Securities			Total
Balance at January 31, 2015		$	0.9		$	5.1		$	6.0
Purchases		4.3			6.2			10.5
Settlements		(5.7		)	(8.0		)	(13.7		)
Gains included in earnings		1.0			—			1.0
Gains included in OCI		—			0.4			0.4
Balance at October 31, 2015		$	0.5		$	3.7		$	4.2

Available-for-sale Securities

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



	October 31, 2015
	Cost		Fair Value
Due within 1 year	$	903.0	$	902.8
Due in 1 year through 5 years	543.4		543.8
Total	$	1,446.4	$	1,446.6

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

The fair values of derivative instruments in Autodesk’s Condensed Consolidated Balance Sheets were as follows as of October 31, 2015 and January 31, 2015:



	Balance Sheet Location	Fair Value at
	Balance Sheet Location	October 31, 2015		January 31, 2015
Derivative Assets
Foreign currency contracts designated as cash flow hedges	Prepaid expenses and other current assets (1)	$	2.9	$	20.4
Derivatives not designated as hedging instruments	Prepaid expenses and other current assets and Other assets	1.3		0.9
Total derivative assets		$	4.2	$	21.3
Derivative Liabilities
Foreign currency contracts designated as cash flow hedges	Other accrued liabilities (2)	$	2.0	$	5.4
Derivatives not designated as hedging instruments	Other accrued liabilities	0.6		—
Total derivative liabilities		$	2.6	$	5.4

____________________


(1)	Considering Autodesk's master netting arrangements, these contracts are presented net settled. The gross balance is $6.4 million and $23.8 million at October 31, 2015 and January 31, 2015, respectively.


(2)	Considering Autodesk's master netting arrangements, these contracts are presented net settled. The gross balance is $5.5 million and $8.7 million at October 31, 2015 and January 31, 2015, respectively.

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



	Foreign Currency Contracts
	Three Months Ended October 31,						Nine Months Ended October 31,
	2015			2014			2015			2014
Amount of (loss) gain recognized in accumulated other comprehensive income on derivatives (effective portion)	$	(5.0	)	$	22.3		$	1.7		$	22.5
Amount and location of gain (loss) reclassified from accumulated other comprehensive income into income (effective portion)
Net revenue	$	9.5		$	2.1		$	31.8		$	4.6
Operating expenses	(2.4		)	(0.8		)	(7.9		)	(1.7		)
Total	$	7.1		$	1.3		$	23.9		$	2.9
Amount and location of (loss) gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)
Interest and other expense, net	$	(0.2	)	$	0.1		$	(0.5	)	$	0.3



	Three Months Ended October 31,						Nine Months Ended October 31,
	2015			2014			2015			2014
Amount and location of loss recognized in income on derivatives (1)
Interest and other expense, net	$	(2.5	)	$	(4.5	)	$	(1.8	)	$	(15.1	)

____________________


(1)	Prior period balances have been adjusted to conform to current period presentation.

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References+ Details

Stock-based Compensation Expense (Tables)

9 Months Ended

Oct. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

A summary of stock option activity for the nine months ended October 31, 2015 is as follows:



	Number of Shares		Weighted average exercise price per share		Weighted average remaining contractual term	Aggregate Intrinsic Value (2)
	(in millions)				(in years)	(in millions)
Options outstanding at January 31, 2015	2.7		$	34.46
Granted (1)	—		—
Exercised	(0.7	)	31.43
Canceled/Forfeited	—		—
Options vested, exercisable and outstanding at October 31, 2015	2.0		$	35.63	3.8	$	38.4
Options available for grant at October 31, 2015	20.8

_______________


(1)	Autodesk did not grant stock options in the nine months ended October 31, 2015.


(2)	Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $55.19 per share as of October 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.

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

The following table summarizes information about the pre-tax intrinsic value of options exercised during the three and nine months ended October 31, 2015 and 2014:



	Three Months Ended October 31,				Nine Months Ended October 31,
	2015		2014		2015		2014
Pre-tax intrinsic value of options exercised (1)	$	2.6	$	10.3	$	20.0	$	54.5

_______________


(1)	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.

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

The following table summarizes information about options vested, exercisable and outstanding at October 31, 2015:



	Number of Shares (in millions)	Weighted average contractual life (in years)	Weighted average exercise price		Aggregate intrinsic value (1) (in millions)
Range of per-share exercise prices:
$12.31 - $29.49	0.7		$	24.62
$29.50 - $41.62	0.8		39.68
$42.39 - $43.81	0.5		43.80
Options vested, exercisable and outstanding	2.0	3.8	$	35.63	$	38.4

_______________


(1)	Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $55.19 per share as of October 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

A summary of restricted stock unit activity for the nine months ended October 31, 2015 is as follows:



	Unvested Restricted Stock Units		Weighted average grant date fair value per share
	(in thousands)
Unvested restricted stock units at January 31, 2015	7,801.3		$	48.46
Granted	3,268.8		50.42
Vested	(2,949.1	)	44.61
Canceled/Forfeited	(364.6	)	49.86
Performance Adjustment (1)	34.6		54.92
Unvested restricted stock units at October 31, 2015	7,791.0		$	50.60

_______________


(1)	Based on Autodesk's financial results for fiscal 2015, 2014 and 2013 performance period. The performance stock units were earned at 113.8%, 65.8%, and 92.3% of the target award, respectively. The vesting of the 2013 performance stock units was subject to the holders satisfying the remaining service condition of the awards, which ended in March 2015.

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, 2015 and 2014, respectively, as follows:



	Three Months Ended October 31,
	2015		2014
Cost of license and other revenue	$	1.7	$	1.2
Cost of subscription	1.5		1.1
Marketing and sales	22.3		19.4
Research and development	17.5		14.7
General and administrative	7.2		6.7
Stock-based compensation expense related to stock awards and ESPP purchases	50.2		43.1
Tax benefit	—		(11.7		)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	50.2	$	31.4

	Nine Months Ended October 31,
	2015		2014
Cost of license and other revenue	$	4.4	$	3.2
Cost of subscription	4.1		2.9
Marketing and sales	61.3		51.0
Research and development	49.9		39.3
General and administrative	21.4		20.1
Stock-based compensation expense related to stock awards and ESPP purchases	141.1		116.5
Tax benefit	—		(31.3		)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	141.1	$	85.2

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

Autodesk uses the following assumptions to estimate the fair value of stock-based awards:



	Three Months Ended October 31, 2015			Three Months Ended October 31, 2014
		Performance Stock Unit (1)	ESPP	Performance Stock Unit (1)	ESPP
Range of expected volatilities		N/A	29%	N/A	29 - 30%
Range of expected lives (in years)		N/A	0.5 - 2.0	N/A	0.5 - 2.0
Expected dividends		N/A	—%	N/A	—%
Range of risk-free interest rates		N/A	0.2 - 0.7%	N/A	0.0 - 0.6%
	Nine Months Ended October 31, 2015			Nine Months Ended October 31, 2014
		Performance Stock Unit	ESPP	Performance Stock Unit	ESPP
Range of expected volatilities		27%	28 - 29%	30%	29 - 33%
Range of expected lives (in years)		N/A	0.5 - 2.0	N/A	0.5 - 2.0
Expected dividends		—%	—%	—%	—%
Range of risk-free interest rates		0.2%	0.1 - 0.7%	0.1%	0.0 - 0.6%

_______________


(1)	Autodesk did not grant PSUs in the three months ended October 31, 2015 and 2014 that were subject to market conditions.

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

+ References+ Details

Income Tax (Tables)

9 Months Ended

Oct. 31, 2015

Income Tax Disclosure [Abstract]

Schedule of Error Corrections and Prior Period Adjustments

The following table summarizes the impact of adjusting the condensed consolidated income statement balances presented for the three and six months ended July 31, 2015:



	As previously reported						As adjusted
(In millions, except per share data)	Three Months Ended July 31, 2015			Adjustment			Three Months Ended July 31, 2015
Provision for income tax	$	(236.4	)	$	(33.1	)	$	(269.5	)
Net loss	(235.5		)	(33.1		)	(268.6		)
Basic and diluted net loss per share	$	(1.04	)	$	(0.14	)	$	(1.18	)

	Six Months Ended July 31, 2015			Adjustment			Six Months Ended July 31, 2015
Provision for income tax	$	(239.1	)	$	(33.1	)	$	(272.2	)
Net loss	(216.4		)	(33.1		)	(249.5		)
Basic and diluted net loss per share	$	(0.95	)	$	(0.15	)	$	(1.10	)

The following table summarizes the impact of adjusting the Condensed Consolidated Balance Sheet balances as of July 31, 2015:



	As previously reported					As adjusted
(In millions)	July 31, 2015		Adjustment			July 31, 2015
Current deferred tax liabilities (1)	$	8.3	$	1.2		$	9.5
Accrued income taxes	52.3		(29.4		)	22.9
Long term deferred tax liabilities	28.9		25.1			54.0
Long term income tax payable	124.0		36.2			160.2
Retained earnings	$	164.4	$	(33.1	)	$	131.3

_______________


(1)	Included in "Other accrued liabilities" in the accompanying Condensed Consolidated Balance Sheets.

- Definition

Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.

+ References+ Details

Acquisitions (Tables)

9 Months Ended

Oct. 31, 2015

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed



	October 31, 2015
Developed technologies	$	26.8
Customer relationships and other non-current intangible assets	12.8
Trade name	4.6
Goodwill	63.4
Deferred revenue (current and non-current)	(0.7		)
Deferred tax liability	(2.4		)
Net tangible assets	0.5
Total	$	105.0

Other Intangible Assets, Net (Tables)

9 Months Ended

Oct. 31, 2015

Finite-Lived Intangible Assets, Net [Abstract]

Schedule of Finite-Lived Intangible Assets

Other intangible assets including developed technologies, customer relationships, trade names, patents, user lists and the related accumulated amortization were as follows:



	October 31, 2015			January 31, 2015
Developed technologies, at cost	$	565.3		$	538.4
Customer relationships, trade names, patents, and user list, at cost (1)	365.9			348.9
Other intangible assets, at cost (2)	931.2			887.3
Less: Accumulated amortization	(777.6		)	(715.4		)
Other intangible assets, net	$	153.6		$	171.9

_______________


(1)	Included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.


(2)	Includes the effects of foreign currency translation.

Goodwill (Tables)

9 Months Ended

Oct. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The change in the carrying amount of goodwill by reporting unit during the nine months ended October 31, 2015 is as follows:



	Platform Solutions and Emerging Business			Architecture, Engineering and Construction			Manufacturing			Media and Entertainment			Delcam (1)			Total
Balances as of January 31, 2015
Goodwill	$	327.5		$	427.0		$	422.7		$	245.2		$	183.0		$	1,605.4
Accumulated impairment losses	—			—			—			(149.2		)	—			(149.2		)
	327.5			427.0			422.7			96.0			183.0			1,456.2
Addition arising from other acquisitions	32.2			4.2			16.6			10.4			—			63.4
Effect of foreign currency translation, purchase accounting adjustments, and other	(0.5		)	(2.0		)	(1.2		)	0.1			(1.0		)	(4.6		)
Balances as of October 31, 2015
Goodwill	359.2			429.2			438.1			255.7			182.0			1,664.2
Accumulated impairment losses	—			—			—			(149.2		)	—			(149.2		)
	$	359.2		$	429.2		$	438.1		$	106.5		$	182.0		$	1,515.0

_______________


(1)	Delcam is a separate reporting unit within our Manufacturing ("MFG") operating segment.

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

9 Months Ended

Oct. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

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



	October 31, 2015			January 31, 2015
Computer hardware, at cost	$	198.9		$	194.0
Computer software, at cost	79.8			84.9
Leasehold improvements, land and buildings, at cost	187.5			176.3
Furniture and equipment, at cost	57.2			53.0
	523.4			508.2
Less: Accumulated depreciation	(368.1		)	(349.0		)
Computer software, hardware, leasehold improvements, furniture and equipment, net	$	155.3		$	159.2

Restructuring (Tables)

9 Months Ended

Oct. 31, 2015

Restructuring and Related Activities [Abstract]

Schedule of Restructuring and Related Costs

The following table sets forth the restructuring activities during the nine months ended October 31, 2015:



	Balance at January 31, 2015		Additions		Payments			Adjustments (1)		Balance at October 31, 2015
Fiscal 2014 Plan
Lease termination and asset costs	$	1.4	$	—	$	(0.3	)	$	0.2	$	1.3
Total	$	1.4	$	—	$	(0.3	)	$	0.2	$	1.3
Current portion (2)	$	0.6								$	0.8
Non-current portion (2)	0.8									0.5
Total	$	1.4								$	1.3

____________________


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


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

Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Oct. 31, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss, net of taxes, consisted of the following at October 31, 2015:



	Net Unrealized Gains (Losses) on Derivative Instruments			Net Unrealized Gains (Losses) on Available-for-Sale Securities			Defined Benefit Pension Components			Foreign Currency Translation Adjustments			Total
Balances, January 31, 2015	$	42.8		$	1.6		$	(23.7	)	$	(74.0	)	$	(53.3	)
Other comprehensive income (loss) before reclassifications	2.4			(0.7		)	0.4			(10.7		)	(8.6		)
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss	(23.9		)	(1.1		)	0.9			—			(24.1		)
Tax effects	(0.7		)	0.2			—			—			(0.5		)
Net current period other comprehensive (loss) income	(22.2		)	(1.6		)	1.3			(10.7		)	(33.2		)
Balances, October 31, 2015	$	20.6		$	—		$	(22.4	)	$	(84.7	)	$	(86.5	)

Net (Loss) Income Per Share (Tables)

9 Months Ended

Oct. 31, 2015

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

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



	Three Months Ended October 31,					Nine Months Ended October 31,
	2015			2014		2015			2014
Numerator:
Net (loss) income	$	(43.8	)	$	10.7	$	(293.3	)	$	70.3
Denominator:
Denominator for basic net (loss) income per share—weighted average shares	225.3			226.9		226.5			227.1
Effect of dilutive securities (1)	—			4.6		—			4.8
Denominator for dilutive net (loss) income per share	225.3			231.5		226.5			231.9
Basic net (loss) income per share	$	(0.19	)	$	0.05	$	(1.29	)	$	0.31
Diluted net (loss) income per share	$	(0.19	)	$	0.05	$	(1.29	)	$	0.30

Segments (Tables)

9 Months Ended

Oct. 31, 2015

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

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



	Three Months Ended October 31,						Nine Months Ended October 31,
	2015			2014			2015			2014
Net revenue:
Architecture, Engineering and Construction	$	224.9		$	217.1		$	695.0		$	630.5
Manufacturing	174.9			169.7			530.7			485.2
Platform Solutions and Emerging Business	160.9			188.4			510.3			607.8
Media and Entertainment	39.1			42.8			119.8			124.1
	$	599.8		$	618.0		$	1,855.8		$	1,847.6
Gross profit:
Architecture, Engineering and Construction	$	202.0		$	194.3		$	628.5		$	566.0
Manufacturing	155.2			152.8			464.5			437.0
Platform Solutions and Emerging Business	135.9			167.3			437.7			543.6
Media and Entertainment	30.5			32.1			94.9			93.3
Unallocated (1)	(14.8		)	(14.5		)	(45.6		)	(44.9		)
	$	508.8		$	532.0		$	1,580.0		$	1,595.0

_______________


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

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

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



	Three Months Ended October 31,				Nine Months Ended October 31,
	2015		2014		2015		2014
Net revenue:
Americas
U.S.	$	195.6	$	189.3	$	589.7	$	543.4
Other Americas	40.2		41.5		125.8		116.4
Total Americas	235.8		230.8		715.5		659.8
Europe, Middle East and Africa	225.1		238.2		696.2		707.2
Asia Pacific
Japan	49.0		58.0		164.8		215.1
Other Asia Pacific	89.9		91.0		279.3		265.5
Total Asia Pacific	138.9		149.0		444.1		480.6
Total net revenue	$	599.8	$	618.0	$	1,855.8	$	1,847.6

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References+ Details

Basis of Presentation Reclassification (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended	9 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Oct. 31, 2014	Jul. 31, 2015	Oct. 31, 2015	Oct. 31, 2014
Income tax expense	$ 21.3	$ 269.5	$ 0.9	$ 272.2	$ 293.5	$ 19.8
Operating Expenses	523.6		517.4		1,569.0	1,488.3
Employee Benefits and Estimated Personal Property Liabilities
Operating Expenses					5.7
Restatement Adjustment
Income tax expense		$ 33.1		$ 33.1

Concentration of Credit Risk Additional Information (Details) (USD $)		3 Months Ended		9 Months Ended			12 Months Ended
	Oct. 31, 2015	Oct. 31, 2015 Tech Data [Member] Net Revenue	Oct. 31, 2014 Tech Data [Member] Net Revenue	Oct. 31, 2015 Tech Data [Member] Net Revenue	Oct. 31, 2014 Tech Data [Member] Net Revenue	Oct. 31, 2015 Tech Data [Member] Accounts Receivable	Jan. 31, 2015 Tech Data [Member] Accounts Receivable
Concentration Risk [Line Items]
Unsecured revolving credit facility	$ 400,000,000
Concentration risk		26.00%	26.00%	25.00%	26.00%	25.00%	22.00%

Financial Instruments Cost and Fair Value of Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified

Oct. 31, 2015

Jan. 31, 2015

Oct. 31, 2014

Jan. 31, 2014

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

$ 1,337.5

$ 1,410.6

$ 1,345.0

$ 1,853.0

Total

1,446.4

Derivative contracts, Amortized Cost

2.2

^[1]

3.5

^[1]

Derivative contracts, Gross unrealized gains

3.2

^[1]

19.5

^[1]

Derivative contracts, Gross unrealized losses

(3.8)

^[1]

(7.0)

^[1]

Derivative contracts, Fair Value

1.6

^[1]

16.0

^[1]

Amortized Cost

2,313.1

1,592.6

Gross unrealized gains

8.9

26.6

Gross unrealized losses

(6.3)

(9.4)

Fair Value

2,315.7

1,609.8

Short-term available-for-sale

Schedule of Available-for-sale Securities [Line Items]

Mutual funds, Amortized Cost

41.0

36.9

Mutual funds, Gross unrealized gains

3.1

3.4

Mutual funds, Gross unrealized losses

(0.1)

Mutual funds, Fair Value

44.0

40.3

Short-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

59.4

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

59.4

Short-term available-for-sale | Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

202.4

101.9

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

202.4

101.9

Short-term available-for-sale | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

176.4

258.4

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

176.4

258.4

Short-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

374.1

148.0

Marketable securities, Gross unrealized gains

0.1

Marketable securities, Gross unrealized losses

(0.3)

(0.1)

Marketable securities, Fair Value

373.9

148.0

Short-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

17.4

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

17.4

Short-term available-for-sale | U.S. treasury bills

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

47.5

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

47.5

Short-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

3.4

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

3.4

Short-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

22.4

29.2

Marketable securities, Gross unrealized gains

0.1

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

22.4

29.3

Short-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

37.9

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

37.9

Long-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

74.6

8.9

Marketable securities, Gross unrealized gains

0.1

Marketable securities, Gross unrealized losses

(0.1)

Marketable securities, Fair Value

74.6

9.0

Long-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

343.6

199.4

Marketable securities, Gross unrealized gains

0.3

0.6

Marketable securities, Gross unrealized losses

(0.9)

(0.2)

Marketable securities, Fair Value

343.0

199.8

Long-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

24.5

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

24.5

Long-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

35.4

Marketable securities, Gross unrealized gains

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

35.4

Long-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

2.9

13.3

Marketable securities, Gross unrealized gains

0.1

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

2.9

13.4

Long-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Amortized Cost

59.6

50.6

Marketable securities, Gross unrealized gains

0.1

0.2

Marketable securities, Gross unrealized losses

Marketable securities, Fair Value

59.7

50.8

Convertible debt securities

Schedule of Available-for-sale Securities [Line Items]

Total

2.8

^[2]

4.7

^[2]

Convertible debt securities, Gross unrealized gains

2.0

^[2]

2.5

^[2]

Convertible debt securities, Gross unrealized losses

(1.1)

^[2]

(2.1)

^[2]

Convertible debt securities, Fair Value

3.7

^[2]

5.1

^[2]

Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

323.4

^[3]

258.6

^[3]

Cash equivalents, Fair Value

323.4

^[3]

258.6

^[3]

Custody cash deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

40.0

^[3]

141.5

^[3]

Cash equivalents, Fair Value

40.0

^[3]

141.5

^[3]

Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

153.6

^[3]

161.0

^[3]

Cash equivalents, Fair Value

153.6

^[3]

161.0

^[3]

Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

5.0

^[3]

11.5

^[3]

Cash equivalents, Fair Value

5.0

11.5

^[3]

Money market funds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

283.5

^[3]

127.3

^[3]

Cash equivalents, Fair Value

283.5

^[3]

127.3

^[3]

Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

3.0

^[3]

Cash equivalents, Fair Value

3.0

^[3]

Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents

15.0

^[3]

Cash equivalents, Fair Value

15.0

^[3]

Level 1

Schedule of Available-for-sale Securities [Line Items]

Derivative contracts, Fair Value

^[1]

Fair Value

1,616.2

1,042.0

Level 1 | Short-term available-for-sale

Schedule of Available-for-sale Securities [Line Items]

Mutual funds, Fair Value

44.0

40.3

Level 1 | Short-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

59.4

Level 1 | Short-term available-for-sale | Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

202.4

101.9

Level 1 | Short-term available-for-sale | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 1 | Short-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

373.9

148.0

Level 1 | Short-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 1 | Short-term available-for-sale | U.S. treasury bills

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

47.5

Level 1 | Short-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 1 | Short-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

22.4

29.3

Level 1 | Short-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

37.9

Level 1 | Long-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

74.6

9.0

Level 1 | Long-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

343.0

199.8

Level 1 | Long-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 1 | Long-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 1 | Long-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

2.9

13.4

Level 1 | Long-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

59.7

50.8

Level 1 | Convertible debt securities

Schedule of Available-for-sale Securities [Line Items]

Convertible debt securities, Fair Value

^[2]

Level 1 | Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

323.4

^[3]

258.6

^[3]

Level 1 | Custody cash deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

40.0

^[3]

141.5

^[3]

Level 1 | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 1 | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

5.0

^[3]

11.5

^[3]

Level 1 | Money market funds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 1 | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

3.0

^[3]

Level 1 | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

15.0

^[3]

Level 2

Schedule of Available-for-sale Securities [Line Items]

Derivative contracts, Fair Value

1.1

^[1]

15.1

^[1]

Fair Value

695.3

561.8

Level 2 | Short-term available-for-sale

Schedule of Available-for-sale Securities [Line Items]

Mutual funds, Fair Value

Level 2 | Short-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Short-term available-for-sale | Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Short-term available-for-sale | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

176.4

258.4

Level 2 | Short-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Short-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

17.4

Level 2 | Short-term available-for-sale | U.S. treasury bills

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Short-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

3.4

Level 2 | Short-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Short-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Long-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Long-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Long-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

24.5

Level 2 | Long-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

35.4

Level 2 | Long-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Long-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 2 | Convertible debt securities

Schedule of Available-for-sale Securities [Line Items]

Convertible debt securities, Fair Value

^[2]

Level 2 | Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 2 | Custody cash deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 2 | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

153.6

^[3]

161.0

^[3]

Level 2 | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 2 | Money market funds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

283.5

^[3]

127.3

^[3]

Level 2 | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 2 | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 3

Schedule of Available-for-sale Securities [Line Items]

Derivative contracts, Fair Value

0.5

^[1]

0.9

^[1]

Fair Value

4.2

6.0

Level 3 | Short-term available-for-sale

Schedule of Available-for-sale Securities [Line Items]

Mutual funds, Fair Value

Level 3 | Short-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | U.S. treasury bills

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Short-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Long-term available-for-sale | U.S. government agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Long-term available-for-sale | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Long-term available-for-sale | Sovereign debt

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Long-term available-for-sale | Asset backed securities

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Long-term available-for-sale | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Long-term available-for-sale | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Marketable securities, Fair Value

Level 3 | Convertible debt securities

Schedule of Available-for-sale Securities [Line Items]

Convertible debt securities, Fair Value

3.7

^[2]

5.1

^[2]

Level 3 | Certificates of deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 3 | Custody cash deposit

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 3 | Commercial paper

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 3 | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 3 | Money market funds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 3 | Agency bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

^[3]

Level 3 | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Cash equivalents, Fair Value

$ 0

^[3]

[1]	Included in “Prepaid expenses and other current assets,” “Other assets,” or “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.
[2]	Considered “available-for-sale” and included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.
[3]	Included in “Cash and cash equivalents” in the accompanying Condensed Consolidated Balance Sheets.

Financial Instruments Reconciliation of the Change in Level 3 Items (Details) (Level 3, USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 31, 2015	$ 6.0
Purchases	10.5
Settlements	(13.7)
Gains included in earnings	1.0
Gains included in OCI	0.4
Balance at October 31, 2015	4.2
Derivative Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 31, 2015	0.9
Purchases	4.3
Settlements	(5.7)
Gains included in earnings	1.0
Gains included in OCI	0
Balance at October 31, 2015	0.5
Convertible Debt Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 31, 2015	5.1
Purchases	6.2
Settlements	(8.0)
Gains included in earnings	0
Gains included in OCI	0.4
Balance at October 31, 2015	$ 3.7

Financial Instruments Contractual Maturities of Types of Securities (Details) (USD $) In Millions, unless otherwise specified	Oct. 31, 2015
Cost
Due within 1 year	$ 903.0
Due in 1 year through 5 years	543.4
Total	1,446.4
Fair Value
Due within 1 year	902.8
Due in 1 year through 5 years	543.8
Total	$ 1,446.6

Financial Instruments Available for Sale Securities Gain/Loss Activity (Details) (USD $)	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Investments, All Other Investments [Abstract]
Cost method investments	$ 74,200,000		$ 52,600,000
Other than temporary impairment losses, investments	200,000	3,400,000
Gain (loss) on investments	300,000	700,000
Proceeds from sale and maturity of marketable securities	$ 1,200,000,000	$ 800,000,000

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References+ Details

Financial Instruments Fair Value of Derivative Instruments (Details) (USD $)
In Millions, unless otherwise specified

Oct. 31, 2015

Jan. 31, 2015

Derivatives, Fair Value [Line Items]

Derivative Assets

$ 4.2

$ 21.3

Derivative Liabilities

2.6

5.4

Designated as hedging instrument

Derivatives, Fair Value [Line Items]

Derivative, notional amount

328.3

336.6

Net gain expected to be recognized in next 12 months

20.6

Foreign currency contracts | Designated as hedging instrument | Prepaid expenses and other current assets

Derivatives, Fair Value [Line Items]

Derivative Assets

2.9

^[1]

20.4

^[1]

Derivative assets, gross

6.4

23.8

Foreign currency contracts | Designated as hedging instrument | Other accrued liabilities

Derivatives, Fair Value [Line Items]

Derivative Liabilities

2.0

^[2]

5.4

^[2]

Derivative liabilities, gross

5.5

8.7

Foreign currency contracts | Derivatives not designated as hedging instruments

Derivatives, Fair Value [Line Items]

Derivative, notional amount

1.5

44.6

Foreign currency contracts | Derivatives not designated as hedging instruments | Prepaid expenses and other current assets

Derivatives, Fair Value [Line Items]

Derivative Assets

1.3

0.9

Foreign currency contracts | Derivatives not designated as hedging instruments | Other accrued liabilities

Derivatives, Fair Value [Line Items]

Derivative Liabilities

$ 0.6

$ 0

[1]	Considering Autodesk's master netting arrangements, these contracts are presented net settled. The gross balance is $6.4 million and $23.8 million at October 31, 2015 and January 31, 2015, respectively.
[2]	Considering Autodesk's master netting arrangements, these contracts are presented net settled. The gross balance is $5.5 million and $8.7 million at October 31, 2015 and January 31, 2015, respectively.

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References+ Details

- Definition

Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References+ Details

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References+ Details

- Definition

Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References+ Details

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

3 Months Ended

9 Months Ended

Oct. 31, 2015

Oct. 31, 2014

Oct. 31, 2015

Oct. 31, 2014

Designated as hedging instrument

Derivative Instruments, Gain (Loss) [Line Items]

Amount of (loss) gain recognized in accumulated other comprehensive income on derivatives (effective portion)

$ (5.0)

$ 22.3

$ 1.7

$ 22.5

Amount and location of gain (loss) reclassified from accumulated other comprehensive income into income (effective portion)

7.1

1.3

23.9

2.9

Designated as hedging instrument | Net revenue

Derivative Instruments, Gain (Loss) [Line Items]

Amount and location of gain (loss) reclassified from accumulated other comprehensive income into income (effective portion)

9.5

2.1

31.8

4.6

Designated as hedging instrument | Operating expenses

Derivative Instruments, Gain (Loss) [Line Items]

Amount and location of gain (loss) reclassified from accumulated other comprehensive income into income (effective portion)

(2.4)

(0.8)

(7.9)

(1.7)

Designated as hedging instrument | Interest and other expense, net

Derivative Instruments, Gain (Loss) [Line Items]

Amount and location of (loss) gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)

(0.2)

0.1

(0.5)

0.3

Derivatives not designated as hedging instruments | Interest and other expense, net

Derivative Instruments, Gain (Loss) [Line Items]

Amount and location of loss recognized in income on derivatives (1)

$ (2.5)

$ (4.5)

$ (1.8)

$ (15.1)

^[1]

[1]	Prior period balances have been adjusted to conform to current period presentation.

Stock-based Compensation Expense Stock-Based Compensation Expense - Additional Information (Details) (USD $)
In Millions, except Share data, unless otherwise specified

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

Oct. 31, 2015

stock_plan

Oct. 31, 2015

Restricted Stock Units (RSUs) and Performance Shares

Oct. 31, 2014

Restricted Stock Units (RSUs) and Performance Shares

Jan. 31, 2015

Restricted Stock Units (RSUs) and Performance Shares

Oct. 31, 2015

Restricted Stock Units (RSUs)

Oct. 31, 2014

Restricted Stock Units (RSUs)

Oct. 31, 2015

Restricted Stock Units (RSUs)

Oct. 31, 2014

Restricted Stock Units (RSUs)

Oct. 31, 2015

Performance Stock Unit

Oct. 31, 2014

Performance Stock Unit

Oct. 31, 2015

Performance Stock Unit

Oct. 31, 2014

Performance Stock Unit

Oct. 31, 2015

Employee Qualified Stock Purchase Plan 1998 ESP Plan

Oct. 31, 2014

Employee Qualified Stock Purchase Plan 1998 ESP Plan

Oct. 31, 2015

Employee Qualified Stock Purchase Plan 1998 ESP Plan

Oct. 31, 2014

Employee Qualified Stock Purchase Plan 1998 ESP Plan

Jul. 31, 2015

Directors stock plan 2012

Oct. 31, 2015

Directors stock plan 2012

Jul. 31, 2015

Directors stock plan 2012

Minimum

Jul. 31, 2015

Directors stock plan 2012

Maximum

Jul. 31, 2015

Employee Stock Plan 2012

Jun. 10, 2015

Employee Stock Plan 2012

Oct. 31, 2015

Employee Stock Plan 2012

Oct. 31, 2015

Share-based Compensation Award, Tranche One

Performance Stock Unit

Oct. 31, 2015

Share-based Compensation Award, Tranche Two

Performance Stock Unit

Oct. 31, 2015

Share-based Compensation Award, Tranche Three

Performance Stock Unit

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

Share based compensation arrangements by share based payment awards, number of active plans (plan)

Share based compensation arrangement by share based payment award expired or terminated plans (plan)

Awards, number of additional shares authorized

900,000

12,500,000

Awards, number of shares authorized

1,700,000

45,100,000

Stock issued during period, shares, restricted stock award, net of forfeitures

39,100,000

Stock issued during period, shares, share-based compensation, forfeited

6,000,000

Share-based compensation shares granted to share issued

2.11

1.79

Options granted in period

^[1]

700,000

27,700,000

Award vesting period

3 years

1 year

3 years

Share based compensation arrangement by share based payment award options expiration term (in years)

10 years

Employee stock plan shares remaining available for issuance

38,600,000

1,000,000

19,800,000

Nonvested awards, total compensation cost not yet recognized

$ 250.6

$ 9.6

Awards granted in period, weighted average grant date fair value (in usd per share)

$ 50.42

$ 52.89

Awards vested in period, fair value

156.6

110.5

Awards granted in period

3,268,800

2,800,000

400,000

PSU Annual Vesting Percentage

33.33%

Allocated share-based compensation expense

$ 37.9

$ 31.2

$ 103.7

$ 82.1

$ 5.7

$ 4.9

$ 17.2

$ 12.7

Nonvested awards, total compensation cost not yet recognized, period for recognition

1 year 10 months 2 days

1 year 0 months 25 days

Awards, nonvested, number

7,791,000

7,801,300

7,000,000

800,000

Employee stock purchase plan maximum percentage of compensation to purchase shares by eligible participants

15.00%

Employee stock purchase plan minimum percentage of common stock fair value defined to purchase shares by eligible participants

85.00%

Options, other increases (decreases) in period

10,000,000

Options, other increases (decreases) in period percentage calculation

2.00%

Shares issued under employee stock purchase plans

1,000,000

2,100,000

Awards issued, share average price (in usd per share)

$ 35.59

$ 34.19

$ 36.29

$ 33.91

Weighted average grant date fair value per share of stock options granted (in dollars per share)

$ 11.91

$ 15.44

$ 11.85

$ 15.14

[1]	Autodesk did not grant stock options in the nine months ended October 31, 2015.

Stock-based Compensation Expense Schedule Of Share-based Compensation Options Activity (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified

9 Months Ended

3 Months Ended

9 Months Ended

Oct. 31, 2015

Jan. 31, 2015

Oct. 31, 2015

$12.31 - $29.49

Oct. 31, 2015

$29.50 - $41.62

Oct. 31, 2015

$42.39 - $43.81

Oct. 31, 2015

Employee Qualified Stock Purchase Plan 1998 ESP Plan

Oct. 31, 2014

Employee Qualified Stock Purchase Plan 1998 ESP Plan

Oct. 31, 2015

Employee Qualified Stock Purchase Plan 1998 ESP Plan

Oct. 31, 2014

Employee Qualified Stock Purchase Plan 1998 ESP Plan

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

Awards issued, share average price (in usd per share)

$ 35.59

$ 34.19

$ 36.29

$ 33.91

Shares issued under employee stock purchase plans

1.0

2.1

Number of Shares

Options outstanding (in shares)

2.7

Granted (in shares)

^[1]

Exercised (in shares)

(0.7)

Canceled/Forfeited (in shares)

Options outstanding (in shares)

2.0

Options vested and exercisable (in shares)

2.0

0.7

0.8

0.5

Options available (in shares)

20.8

Weighted average exercise price per share

Outstanding (in dollars per share)

$ 35.63

$ 34.46

Granted (in dollars per share)

$ 0.00

^[1]

Exercised (in dollars per share)

$ 31.43

Canceled/Forfeited (in dollars per share)

$ 0.00

Vested and exercisable (in dollars per share)

$ 35.63

$ 24.62

$ 39.68

$ 43.80

Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]

Options outstanding, Weighted average remaining contractual term

3 years 9 months

Options vested and exercisable, Weighted average remaining contractual term

3 years 9 months

Options outstanding, Aggregate Intrinsic Value

$ 38.4

^[2]

Options vested and exercisable, Aggregate Intrinsic Value

$ 38.4

^[2]

Sale of stock, price per share (in usd per share)

$ 55.19

Exercise Price, Lower Limit (in dollars per share)

$ 12.31

$ 29.50

$ 42.39

Exercise Price, Upper Limit (in dollars per share)

$ 29.49

$ 41.62

$ 43.81

Weighted average grant date fair value per share of stock options granted (in dollars per share)

$ 11.91

$ 15.44

$ 11.85

$ 15.14

[1]	Autodesk did not grant stock options in the nine months ended October 31, 2015.
[2]	Represents the total pre-tax intrinsic value, based on Autodesk’s closing stock price of $55.19 per share as of October 31, 2015, which would have been received by the option holders had all option holders exercised their options as of that date.

Stock-based Compensation Expense Intrinsic Value of Options Exercised and Weighted Average Grant Date Fair Value of Stock Options Granted (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

Oct. 31, 2015

Oct. 31, 2014

Oct. 31, 2015

Oct. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Pre-tax intrinsic value of options exercised

$ 2.6

$ 10.3

$ 20.0

^[1]

$ 54.5

^[1]

[1]	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.

Stock-based Compensation Expense Summary of Restricted Stock Award and Restricted Stock Unit Activity (Details) (USD $)

9 Months Ended

Oct. 31, 2015

Oct. 31, 2014

Jan. 31, 2015

Jan. 31, 2014

Jan. 31, 2013

Restricted Stock Units (RSUs) and Performance Shares

Unvested Restricted Stock Units

Unvested restricted stock units at January 31, 2015 (shares)

7,801,300

Granted (shares)

3,268,800

Vested (shares)

(2,949,100)

Canceled/Forfeited (shares)

(364,600)

Unvested restricted stock units at July 31, 2015 (shares)

7,791,000

Weighted average grant date fair value per share

Unvested restricted stock units at January 31, 2015 (usd per share)

$ 48.46

Granted (in usd per share)

$ 50.42

$ 52.89

Vested (in usd per share)

$ 44.61

Canceled/Forfeited (in usd per share)

$ 49.86

Unvested restricted stock units at July 31, 2015 (usd per share)

$ 50.60

Performance shares units payout

113.80%

65.80%

92.30%

Restricted Stock Units (RSUs)

Unvested Restricted Stock Units

Granted (shares)

2,800,000

Unvested restricted stock units at July 31, 2015 (shares)

7,000,000

Performance Stock Unit

Unvested Restricted Stock Units

Granted (shares)

400,000

Performance adjustment (shares)

34,600

^[1]

Unvested restricted stock units at July 31, 2015 (shares)

800,000

Weighted average grant date fair value per share

Performance adjustment (in usd per share)

$ 54.92

^[1]

[1]	Based on Autodesk's financial results for fiscal 2015, 2014 and 2013 performance period. The performance stock units were earned at 113.8%, 65.8%, and 92.3% of the target award, respectively.

Stock-based Compensation Expense Stock Based Compensation Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense related to stock awards and ESPP purchases	$ 50.2	$ 43.1	$ 141.1	$ 116.5
Tax benefit	0	(11.7)	0	(31.3)
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	50.2	31.4	141.1	85.2
Cost of license and other revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	1.7	1.2	4.4	3.2
Cost of subscription
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	1.5	1.1	4.1	2.9
Marketing and sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	22.3	19.4	61.3	51.0
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	17.5	14.7	49.9	39.3
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated share-based compensation expense	$ 7.2	$ 6.7	$ 21.4	$ 20.1

Stock-based Compensation Expense Assumption Used to Estimate the Fair Value of Stock-Based Awards (Details)	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Performance Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of expected volatilities			27.00%	30.00%
Expected dividends			0.00%	0.00%
Range of risk-free interest rates			0.20%	0.10%
Employee Qualified Stock Purchase Plan 1998 ESP Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of expected volatilities	29.00%
Expected dividends	0.00%	0.00%	0.00%	0.00%
Employee Qualified Stock Purchase Plan 1998 ESP Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of expected volatilities		29.00%	28.00%	29.00%
Range of expected lives (in years)	6 months	6 months	6 months	6 months
Range of risk-free interest rates	0.20%	0.00%	0.10%	0.00%
Employee Qualified Stock Purchase Plan 1998 ESP Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of expected volatilities		30.00%	29.00%	33.00%
Range of expected lives (in years)	2 years	2 years	2 years	2 years
Range of risk-free interest rates	0.70%	0.60%	0.70%	0.60%

Income Tax (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended	9 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Oct. 31, 2014	Jul. 31, 2015	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Income tax expense	$ 21.3	$ 269.5	$ 0.9	$ 272.2	$ 293.5	$ 19.8
(Loss) income before income taxes	(22.5)		11.6		0.2	90.1
Deferred tax assets valuation allowance	312.3	230.8		230.8	312.3		26.7
Unrecognized tax benefits	254.0				254.0
Unrecognized tax benefits that would impact effective tax rate	$ 236.6				$ 236.6

Income Tax (Error Corrections) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended	9 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Oct. 31, 2014	Jul. 31, 2015	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Provision for income taxes	$ (21.3)	$ (269.5)	$ (0.9)	$ (272.2)	$ (293.5)	$ (19.8)
Net loss	(43.8)	(268.6)	10.7	(249.5)	(293.3)	70.3
Basic net loss per share (in usd per share)	$ (0.19)	$ (1.18)	$ 0.05	$ (1.10)	$ (1.29)	$ 0.31
Current deferred tax liabilities (1)		9.5		9.5
Accrued income taxes	28.2	22.9		22.9	28.2		28.2
Long term deferred income taxes	54.9	54.0		54.0	54.9		0
Long term income taxes payable	163.8	160.2		160.2	163.8		158.8
Retained earnings	9.7	131.3		131.3	9.7		499.4
Scenario, Previously Reported
Provision for income taxes		(236.4)		(239.1)
Net loss		(235.5)		(216.4)
Basic net loss per share (in usd per share)		$ (1.04)		$ (0.95)
Current deferred tax liabilities (1)		8.3		8.3
Accrued income taxes		52.3		52.3
Long term deferred income taxes		28.9		28.9
Long term income taxes payable		124.0		124.0
Retained earnings		164.4		164.4
Restatement Adjustment
Provision for income taxes		(33.1)		(33.1)
Net loss		(33.1)		(33.1)
Basic net loss per share (in usd per share)		$ (0.14)		$ (0.15)
Current deferred tax liabilities (1)		1.2		1.2
Accrued income taxes		(29.4)		(29.4)
Long term deferred income taxes		25.1		25.1
Long term income taxes payable		36.2		36.2
Retained earnings		$ (33.1)		$ (33.1)

- Definition

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, netted by jurisdiction and classified as current.

+ References+ Details

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References+ Details

Acquisition (Details) (Series of Individually Immaterial Business Acquisitions, USD $) In Millions, unless otherwise specified	9 Months Ended
	Oct. 31, 2015
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Consideration	$ 105.0

Acquisitions Summary of Fair Value of Assets Acquired and Liabilities Assumed by Major Class (Details) (USD $) In Millions, unless otherwise specified	Oct. 31, 2015	Jan. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 1,515.0	$ 1,456.2
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Goodwill	63.4
Deferred revenue (current and non-current)	0.7
Deferred tax liability	(2.4)
Net tangible assets	0.5
Total	105.0
Series of Individually Immaterial Business Acquisitions \| Developed technologies
Business Acquisition [Line Items]
Finite-lived intangibles	26.8
Series of Individually Immaterial Business Acquisitions \| Customer relationships and other non-current intangible assets
Business Acquisition [Line Items]
Finite-lived intangibles	12.8
Series of Individually Immaterial Business Acquisitions \| Trade name
Business Acquisition [Line Items]
Finite-lived intangibles	$ 4.6

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

Oct. 31, 2015

Jan. 31, 2015

Finite-Lived Intangible Assets [Line Items]

Other intangible assets, at cost

$ 931.2

^[1]

$ 887.3

^[1]

Less: Accumulated amortization

(777.6)

(715.4)

Other intangible assets, net

153.6

171.9

Developed technologies, at cost

Finite-Lived Intangible Assets [Line Items]

Other intangible assets, at cost

565.3

538.4

Customer relationships, trade names, patents, and user list, at cost

Finite-Lived Intangible Assets [Line Items]

Other intangible assets, at cost

$ 365.9

^[2]

$ 348.9

^[2]

[1]	Includes the effects of foreign currency translation.
[2]	Included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.

Goodwill Changes in the Carrying Amount of Goodwill (Details) (USD $)
In Millions, unless otherwise specified

9 Months Ended

Oct. 31, 2015

Jan. 31, 2015

Goodwill [Roll Forward]

Goodwill before accumulated impairment losses beginning balance

$ 1,605.4

Accumulated impairment losses

(149.2)

Goodwill

1,515.0

1,456.2

Effect of foreign currency translation, purchase accounting adjustments, and other

(4.6)

Goodwill before accumulated impairment losses ending balance

1,664.2

Platform Solutions and Emerging Business

Goodwill [Roll Forward]

Goodwill before accumulated impairment losses beginning balance

327.5

Accumulated impairment losses

Goodwill

359.2

327.5

Effect of foreign currency translation, purchase accounting adjustments, and other

(0.5)

Goodwill before accumulated impairment losses ending balance

359.2

Architecture, Engineering and Construction

Goodwill [Roll Forward]

Goodwill before accumulated impairment losses beginning balance

427.0

Accumulated impairment losses

Goodwill

429.2

427.0

Effect of foreign currency translation, purchase accounting adjustments, and other

(2.0)

Goodwill before accumulated impairment losses ending balance

429.2

Manufacturing

Goodwill [Roll Forward]

Goodwill before accumulated impairment losses beginning balance

422.7

Accumulated impairment losses

Goodwill

438.1

422.7

Effect of foreign currency translation, purchase accounting adjustments, and other

(1.2)

Goodwill before accumulated impairment losses ending balance

438.1

Media and Entertainment

Goodwill [Roll Forward]

Goodwill before accumulated impairment losses beginning balance

245.2

Accumulated impairment losses

(149.2)

Goodwill

106.5

96.0

Effect of foreign currency translation, purchase accounting adjustments, and other

0.1

Goodwill before accumulated impairment losses ending balance

255.7

Delcam

Goodwill [Roll Forward]

Goodwill before accumulated impairment losses beginning balance

183.0

^[1]

Accumulated impairment losses

^[1]

Goodwill

182.0

^[1]

183.0

^[1]

Effect of foreign currency translation, purchase accounting adjustments, and other

(1.0)

^[1]

Goodwill before accumulated impairment losses ending balance

182.0

^[1]

Other

Goodwill [Roll Forward]

Goodwill

63.4

Addition arising from other acquisitions

63.4

Other | Platform Solutions and Emerging Business

Goodwill [Roll Forward]

Addition arising from other acquisitions

32.2

Other | Architecture, Engineering and Construction

Goodwill [Roll Forward]

Addition arising from other acquisitions

4.2

Other | Manufacturing

Goodwill [Roll Forward]

Addition arising from other acquisitions

16.6

Other | Media and Entertainment

Goodwill [Roll Forward]

Addition arising from other acquisitions

10.4

Other | Delcam

Goodwill [Roll Forward]

Addition arising from other acquisitions

$ 0

^[1]

[1]	Delcam is a separate reporting unit within our Manufacturing ("MFG") operating segment.

Deferred Compensation Additional Information (Details) (USD $)	Oct. 31, 2015	Jan. 31, 2015
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Marketable securities	$ 1,500,000,000
Rabbi Trust Member
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation liability	44,000,000	40,300,000
Deferred compensation liability current	5,200,000	5,300,000
Deferred compensation liability non-current	$ 38,800,000	$ 35,000,000

Computer Equipment, Software, Furniture and Leasehold Improvements, Net (Details) (USD $) In Millions, unless otherwise specified	Oct. 31, 2015	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Computer software, hardware, leasehold improvements, furniture and equipment, gross	$ 523.4	$ 508.2
Less: Accumulated depreciation	(368.1)	(349.0)
Computer software, hardware, leasehold improvements, furniture and equipment, net	155.3	159.2
Computer hardware, at cost
Property, Plant and Equipment [Line Items]
Computer software, hardware, leasehold improvements, furniture and equipment, gross	198.9	194.0
Computer software, at cost
Property, Plant and Equipment [Line Items]
Computer software, hardware, leasehold improvements, furniture and equipment, gross	79.8	84.9
Leasehold improvements, land and buildings, at cost
Property, Plant and Equipment [Line Items]
Computer software, hardware, leasehold improvements, furniture and equipment, gross	187.5	176.3
Furniture and equipment, at cost
Property, Plant and Equipment [Line Items]
Computer software, hardware, leasehold improvements, furniture and equipment, gross	$ 57.2	$ 53.0

Borrowing Arrangements Additional Information (Details) (USD $)	9 Months Ended			1 Months Ended				1 Months Ended
	Oct. 31, 2015	Jun. 30, 2015 Senior Notes Senior Notes due 2020	Jun. 30, 2015 Senior Notes Senior Notes due 2025	Jun. 30, 2015 Senior Notes 2015 Senior Notes	Oct. 31, 2015 Senior Notes 2015 Senior Notes	Dec. 31, 2012 Senior Notes Senior Notes 2017	Dec. 31, 2012 Senior Notes Senior Notes 2022	Dec. 31, 2012 Senior Notes 2012 Senior Notes	Oct. 31, 2015 Senior Notes 2012 Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 450,000,000	$ 300,000,000			$ 400,000,000	$ 350,000,000
Debt instrument, stated interest rate		3.125%	4.375%			1.95%	3.60%
Proceeds from debt, net of issuance costs				742,000,000				739,300,000
Debt instrument, unamortized discount				1,700,000				4,500,000
Debt issuance cost				6,300,000				6,100,000
Debt issuance redemption discount premium, percentage of principle amount				101.00%				101.00%
Debt fair value					754,100,000				749,700,000
Line of credit facility, maximum borrowing capacity	400,000,000
Line of credit facility, additional borrowings available	100,000,000.0
Line of credit facility, expiration date	May 31, 2020
Line of credit facility, outstanding borrowings	$ 0

Restructuring (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

Oct. 31, 2015

Oct. 31, 2014

Oct. 31, 2015

Oct. 31, 2014

Oct. 31, 2015

Fiscal 2014 Plan

Jan. 31, 2014

Fiscal 2014 Plan

Position

Facility

Jan. 31, 2015

Fiscal 2014 Plan

Oct. 31, 2015

Fiscal 2014 Plan

Lease termination and asset costs

Restructuring Cost and Reserve [Line Items]

Number of positions eliminated (position)

Number of facilities consolidated (facilities)

Expected cost

$ 15.0

Restructuring Reserve [Roll Forward]

1.4

3.1

(0.3)

0.2

^[1]

0.2

^[1]

Ending Balance

1.3

Current portion

0.8

^[2]

0.6

^[2]

Non-current portion

0.5

^[2]

0.8

^[2]

Total Restructuring Reserve

$ 1.3

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

Common Stock Repurchase Program Additional Information (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2015
Common Stock
Equity, Class of Treasury Stock [Line Items]
Repurchased shares of its common stock on the open market, value	$ 72.2	$ 161.3
Retained Earnings
Equity, Class of Treasury Stock [Line Items]
Repurchased shares of its common stock on the open market, value	$ 77.8	$ 196.4
Common Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased and retired (in shares)	3.2	6.9
Repurchased shares of its common stock on the open market, average repurchase price per share (in usd per share)	$ 46.33	$ 51.59
Common Stock shares remained available for repurchase under repurchase plans (in shares)	7.9	7.9

Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, January 31, 2015			$ (53.3)
Other comprehensive income (loss) before reclassifications			(8.6)
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss			(24.1)
Tax effects			(0.5)
Total other comprehensive loss	(16.2)	(3.6)	(33.2)	(0.7)
Balances, October 31, 2015	(86.5)		(86.5)
Net Unrealized Gains (Losses) on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, January 31, 2015			42.8
Other comprehensive income (loss) before reclassifications			2.4
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss			(23.9)
Tax effects			(0.7)
Total other comprehensive loss			(22.2)
Balances, October 31, 2015	20.6		20.6
Net Unrealized Gains (Losses) on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, January 31, 2015			1.6
Other comprehensive income (loss) before reclassifications			(0.7)
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss			(1.1)
Tax effects			0.2
Total other comprehensive loss			(1.6)
Balances, October 31, 2015	0		0
Defined Benefit Pension Components
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, January 31, 2015			(23.7)
Other comprehensive income (loss) before reclassifications			0.4
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss			0.9
Tax effects			0
Total other comprehensive loss			1.3
Balances, October 31, 2015	(22.4)		(22.4)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances, January 31, 2015			(74.0)
Other comprehensive income (loss) before reclassifications			(10.7)
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss			0
Tax effects			0
Total other comprehensive loss			(10.7)
Balances, October 31, 2015	$ (84.7)		$ (84.7)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References+ Details

Net (Loss) Income Per Share (Details) (USD $)
In Millions, except Share data, unless otherwise specified

3 Months Ended

6 Months Ended

9 Months Ended

Oct. 31, 2015

Jul. 31, 2015

Oct. 31, 2014

Jul. 31, 2015

Oct. 31, 2015

Oct. 31, 2014

Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]

Net (loss) income

$ (43.8)

$ (268.6)

$ 10.7

$ (249.5)

$ (293.3)

$ 70.3

Denominator:

Denominator for basic net (loss) income per share—weighted average shares (shares)

225,300,000

226,900,000

226,500,000

227,100,000

Effect of dilutive securities (shares)

4,600,000

^[1]

4,800,000

Denominator for dilutive net (loss) income per share (shares)

225,300,000

231,500,000

226,500,000

231,900,000

Basic net (loss) income per share (in usd per share)

$ (0.19)

$ (1.18)

$ 0.05

$ (1.10)

$ (1.29)

$ 0.31

Diluted net (loss) income per share (in usd per share)

$ (0.19)

$ 0.05

$ (1.29)

$ 0.30

Potentially dilutive shares excluded from the computation of diluted net income per share (shares)

3,400,000

4,000,000

Exercise Price Higher than Average Market Value

Denominator:

Potentially dilutive shares excluded from the computation of diluted net income per share (shares)

600,000

100,000

[1]

The effect of dilutive securities of 3.4 million and 4.0 million shares for the three and nine months ended October 31, 2015, respectively, have been excluded from the calculation of diluted net (loss) income per share as those shares would have been anti-dilutive due to the net (loss) incurred during those periods.

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References+ Details

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References+ Details

Segments Concerning the Operations Of Reportable Segments (Details) (USD $)
In Millions, unless otherwise specified

3 Months Ended

9 Months Ended

Oct. 31, 2015

Oct. 31, 2014

Oct. 31, 2015

segment

Oct. 31, 2014

Segment Reporting Information [Line Items]

Number of reportable segments

Net revenue

$ 599.8

$ 618.0

$ 1,855.8

$ 1,847.6

Gross profit

508.8

532.0

1,580.0

1,595.0

Segments

Segment Reporting Information [Line Items]

Net revenue

599.8

618.0

1,855.8

1,847.6

Unallocated

Segment Reporting Information [Line Items]

Gross profit

(14.8)

(14.5)

(45.6)

^[1]

(44.9)

^[1]

Architecture, Engineering and Construction | Segments

Segment Reporting Information [Line Items]

Net revenue

224.9

217.1

695.0

630.5

Gross profit

202.0

194.3

628.5

566.0

Manufacturing | Segments

Segment Reporting Information [Line Items]

Net revenue

174.9

169.7

530.7

485.2

Gross profit

155.2

152.8

464.5

437.0

Platform Solutions and Emerging Business | Segments

Segment Reporting Information [Line Items]

Net revenue

160.9

188.4

510.3

607.8

Gross profit

135.9

167.3

437.7

543.6

Media and Entertainment

Segment Reporting Information [Line Items]

Number of product groups

Media and Entertainment | Segments

Segment Reporting Information [Line Items]

Net revenue

39.1

42.8

119.8

124.1

Gross profit

$ 30.5

$ 32.1

$ 94.9

$ 93.3

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

Segments Information Regarding Operations by Geographic Area (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Segment Reporting Information [Line Items]
Net revenue	$ 599.8	$ 618.0	$ 1,855.8	$ 1,847.6
Americas
Segment Reporting Information [Line Items]
Net revenue	235.8	230.8	715.5	659.8
Americas \| U.S.
Segment Reporting Information [Line Items]
Net revenue	195.6	189.3	589.7	543.4
Americas \| Other Americas
Segment Reporting Information [Line Items]
Net revenue	40.2	41.5	125.8	116.4
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Net revenue	225.1	238.2	696.2	707.2
Asia Pacific
Segment Reporting Information [Line Items]
Net revenue	138.9	149.0	444.1	480.6
Asia Pacific \| Japan
Segment Reporting Information [Line Items]
Net revenue	49.0	58.0	164.8	215.1
Asia Pacific \| Other Asia Pacific
Segment Reporting Information [Line Items]
Net revenue	$ 89.9	$ 91.0	$ 279.3	$ 265.5

Subsequent Events (Details) (Subsequent Event) In Millions, unless otherwise specified	0 Months Ended
	Nov. 12, 2015 USD ($)	Nov. 12, 2015 EUR (€)	Nov. 12, 2015 USD ($)	Nov. 12, 2015 EUR (€)
Subsequent Event [Line Items]
Consideration	$ 42.5	€ 39.6
Cost Method Investments, Original Cost			$ 27.4	€ 25.5

Recently Issued Accounting Standards (Details) (USD $) In Millions, unless otherwise specified	Jul. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Debt issuance costs reclassified to a reduction in long-term notes payable, net	$ 4.1