Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Oct. 31, 2017	Nov. 30, 2017
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 31, 2017
Document Fiscal Year Focus	2018
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		220,266,822

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Net revenue:
Maintenance	$ 244.4	$ 273.2	$ 769.8	$ 835.1
Subscription	231.1	112.4	600.6	299.7
Total maintenance and subscription revenue	475.5	385.6	1,370.4	1,134.8
License and other	39.8	104.0	132.4	417.4
Total net revenue	515.3	489.6	1,502.8	1,552.2
Cost of revenue:
Cost of maintenance and subscription revenue	53.9	46.8	161.6	140.2
Cost of license and other revenue	19.6	24.3	56.0	86.8
Amortization of developed technology	4.0	10.4	12.7	32.0
Total cost of revenue	77.5	81.5	230.3	259.0
Gross profit	437.8	408.1	1,272.5	1,293.2
Operating expenses:
Marketing and sales	272.5	255.0	785.8	738.9
Research and development	191.8	192.6	573.3	579.1
General and administrative	68.8	70.4	225.1	213.7
Amortization of purchased intangibles	4.7	6.8	15.3	22.5
Restructuring charges and other facility exit costs, net	0.0	3.2	0.2	71.5
Total operating expenses	537.8	528.0	1,599.7	1,625.7
Loss from operations	(100.0)	(119.9)	(327.2)	(332.5)
Interest and other expense, net	(11.2)	(9.4)	(31.8)	(23.1)
Loss before income taxes	(111.2)	(129.3)	(359.0)	(355.6)
Provision for income taxes	(8.6)	(13.5)	(34.4)	(53.1)
Net loss	$ (119.8)	$ (142.8)	$ (393.4)	$ (408.7)
Basic net loss per share (in usd per share)	$ (0.55)	$ (0.64)	$ (1.79)	$ (1.83)
Diluted net loss per share (in usd per share)	$ (0.55)	$ (0.64)	$ (1.79)	$ (1.83)
Weighted average shares used in computing basic net loss per share (shares)	219.6	222.3	219.7	223.3
Weighted average shares used in computing diluted net loss per share (shares)	219.6	222.3	219.7	223.3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (119.8)	$ (142.8)	$ (393.4)	$ (408.7)
Other comprehensive (loss) income, net of reclassifications:
Net loss on derivative instruments (net of tax effect of $0.3, $0.2, $1.7 and ($0.6), respectively)	(2.4)	(0.7)	(15.4)	(11.7)
Change in net unrealized gain (loss) on available-for-sale securities (net of tax effect of ($0.4), $0.0, ($0.3), and ($0.6), respectively)	0.2	(1.6)	0.4	1.8
Change in defined benefit pension items (net of tax effect of $0.0, $0.0, $0.0, and ($0.2), respectively)	0.2	0.3	0.0	0.6
Net change in cumulative foreign currency translation (loss) gain (net of tax effect of $0.0, ($0.5), ($0.9) and ($0.5), respectively)	(0.6)	(55.7)	38.0	(57.1)
Total other comprehensive (loss) income	(2.6)	(57.7)	23.0	(66.4)
Total comprehensive loss	$ (122.4)	$ (200.5)	$ (370.4)	$ (475.1)

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Statement of Comprehensive Income [Abstract]
Net (loss) on derivative instruments, tax effect	$ 0.3	$ 0.2	$ 1.7	$ (0.6)
Change in net unrealized gain (loss) on available-for-sale securities, tax effect	(0.4)	0.0	(0.3)	(0.6)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	0.0	0.0	0.0	(0.2)
Net change in cumulative foreign currency translation loss, tax effect	$ 0.0	$ (0.5)	$ (0.9)	$ (0.5)

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Oct. 31, 2017	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,025.2	$ 1,213.1
Marketable securities	428.7	686.8
Accounts receivable, net	307.8	452.3
Prepaid expenses and other current assets	110.2	108.4
Total current assets	1,871.9	2,460.6
Marketable securities	264.3	306.2
Computer equipment, software, furniture and leasehold improvements, net	148.1	158.6
Developed technologies, net	29.9	45.7
Goodwill	1,588.7	1,561.1
Deferred income taxes, net	64.7	63.9
Other assets	184.4	202.0
Total assets	4,152.0	4,798.1
Current liabilities:
Accounts payable	93.3	93.5
Accrued compensation	195.9	238.2
Accrued income taxes	21.7	50.0
Deferred revenue	1,333.1	1,270.1
Current portion of long-term notes payable, net	0.0	398.7
Other accrued liabilities	106.0	134.9
Total current liabilities	1,750.0	2,185.4
Long-term deferred revenue	430.8	517.9
Long-term income taxes payable	31.3	39.3
Long-term deferred income taxes	97.9	91.5
Long-term notes payable, net	1,585.4	1,092.0
Other liabilities	149.3	138.4
Stockholders’ equity:
Common stock and additional paid-in capital	1,930.8	1,876.3
Accumulated other comprehensive loss	(155.5)	(178.5)
Accumulated deficit	(1,668.0)	(964.2)
Total stockholders’ equity	107.3	733.6
Total liabilities and stockholders' equity	$ 4,152.0	$ 4,798.1

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Operating activities:
Net loss	$ (393.4)	$ (408.7)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation, amortization and accretion	81.5	104.5
Stock-based compensation expense	199.5	162.5
Deferred income taxes	7.3	(39.6)
Restructuring charges and other facility exit costs, net	0.2	71.5
Other operating activities	18.1	3.4
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	143.3	393.8
Prepaid expenses and other current assets	(6.5)	(12.7)
Accounts payable and accrued liabilities	(69.3)	(71.9)
Deferred revenue	(21.8)	15.6
Accrued income taxes	(37.3)	(64.3)
Net cash (used in) provided by operating activities	(78.4)	154.1
Investing activities:
Purchases of marketable securities	(419.6)	(1,106.4)
Sales of marketable securities	199.2	544.7
Maturities of marketable securities	530.1	1,012.6
Capital expenditures	(39.3)	(65.1)
Acquisitions, net of cash acquired	0.0	(85.2)
Other investing activities	(11.5)	(14.8)
Net cash provided by investing activities	258.9	285.8
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	93.2	102.2
Taxes paid related to net share settlement of equity awards	(120.6)	(58.9)
Repurchases of common stock	(437.9)	(397.6)
Proceeds from debt, net of discount	496.9	0.0
Repayment of debt	(400.0)	0.0
Other financing activities	(5.8)	0.0
Net cash used in financing activities	(374.2)	(354.3)
Effect of exchange rate changes on cash and cash equivalents	5.8	(2.1)
Net (decrease) increase in cash and cash equivalents	(187.9)	83.5
Cash and cash equivalents at beginning of period	1,213.1	1,353.0
Cash and cash equivalents at end of period	$ 1,025.2	$ 1,436.5

Basis of Presentation

9 Months Ended

Oct. 31, 2017

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, 2017, and for the three and nine months ended October 31, 2017 and 2016, 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, 2017 are not necessarily indicative of the results for the entire fiscal year ending January 31, 2018, or for any other period. Further, the balance sheet as of January 31, 2017 has been derived from the audited balance sheet as of this date. There have been no material changes, other than what is discussed herein, 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, 2017. 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, 2017, filed on March 21, 2017.

Change in Presentation

During the first quarter of fiscal 2018, the Company changed its historical presentation of its revenue and cost of revenue categories.

Previously, the Company presented revenue and cost of revenue on two lines: subscription, and license and other. Included within subscription was maintenance revenue for all our software products and revenue for our cloud service offerings. License and other revenue included product license revenue, standalone consulting services, and other immaterial items. Also, included within license and other revenue was an allocation of the estimated value of the software license from our term-based product subscriptions and enterprise offerings, which contain a software license, maintenance and cloud services. For these arrangements, as there is no vendor-specific-objective evidence ("VSOE") for the related maintenance, the arrangement consideration was allocated between the license and maintenance deliverables based on best estimated selling prices in our condensed consolidated statements of operations. The Company performed the allocation because it provided a meaningful presentation to investors based on the Company's then current product mix.

As part of the Company's technological and business model transition, the Company discontinued the sale of most of its perpetual licenses, transitioning away from selling a mix of perpetual licenses and term-based product subscriptions to a single subscription model involving more highly interrelated software and cloud functionalities. Fiscal 2018 marks the first full year in the Company's history that it will sell substantially term-based product subscriptions. To better reflect this shift in our business, the Company adopted a revised presentation in the first quarter of fiscal 2018, including the separation of subscription revenue and maintenance revenue on distinct line items on the Company's condensed consolidated statement of operations.

Subscription revenue now consists of our full term-based product subscriptions, cloud service offerings, and flexible enterprise business arrangements. Note that with the change in our presentation of revenue in our condensed consolidated statement of operations in the first quarter of fiscal 2018, our term-based product subscriptions and flexible enterprise business arrangements are classified and presented in a single line item.

Maintenance revenue is presented as a separate line item in the new presentation and consists of revenue from our existing maintenance plan agreements and related renewals.

License and other revenue will continue to be presented as a separate line item and include any residual perpetual licenses sold, standalone consulting services, and other immaterial items.

In connection with these revisions, the Company also revised its cost of revenue classification to present cost of subscription and maintenance revenue and amortization of developed technology separately. Cost of license and other revenue will continue to be presented as a separate line item.

This change in presentation does not affect our total net revenues, total cost of net revenues or overall gross margin. The following table shows reclassified amounts to conform to the current period presentation:



	Three Months Ended October 31, 2016							Nine Months Ended October 31, 2016
	Previously Reported		Change in Presentation Reclassification			Current Presentation		Previously Reported		Change in Presentation Reclassification			Current Presentation
Net revenue:
Maintenance (1)	N/A		$	273.2		$	273.2	N/A		$	835.1		$	835.1
Subscription	$	319.5	(207.1		)	112.4		$	967.5	(667.8		)	299.7
License and other	170.1		(66.1		)	104.0		584.7		(167.3		)	417.4
Total	$	489.6	$	—		$	489.6	$	1,552.2	$	—		$	1,552.2

Cost of revenue:
Maintenance and subscription (2)	$	35.1	$	11.7		$	46.8	$	113.1	$	27.1		$	140.2
License and other	46.4		(22.1		)	24.3		145.9		(59.1		)	86.8
Amortization of developed technology (1)	N/A		10.4			10.4		N/A		32.0			32.0
Total	$	81.5	$	—		$	81.5	$	259.0	$	—		$	259.0

_______________


(1)	These lines were not previously reported in the Condensed Consolidated Statement of Operations.

(2)

Previously, titled "Subscription."

Recently Issued Accounting Standards	9 Months Ended
Recently Issued Accounting Standards	Oct. 31, 2017
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, 2017, that are of significance, or potential significance, to the Company. Accounting standard adopted in the current fiscal year Autodesk adopted FASB's Accounting Standards Update No. 2017-04 ("ASU 2017-04"), "Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment" during the three months ended April 30, 2017. The ASU simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test. Under current guidance, Step 2 of the goodwill impairment test requires entities to calculate the implied fair value of goodwill in the same manner as the amount of goodwill recognized in a business combination by assigning the fair value of a reporting unit to all of the assets and liabilities of the reporting unit. The carrying value in excess of the implied fair value is recognized as goodwill impairment. Under the new standard, goodwill impairment is recognized based on Step 1 of the current guidance, which calculates the carrying value in excess of the reporting unit’s fair value. The new guidance is required to be applied on a prospective basis and as such, Autodesk will use the simplified test in its annual fourth fiscal quarter testing or more often if circumstances indicate a potential impairment may exist, or if events have affected the composition of reporting units. Autodesk does not believe ASU 2017-04 will have a material impact on its consolidated financial statements. Recently issued accounting standards but not yet adopted In August 2017, FASB issued Accounting Standards Update No. 2017-12 ("ASU 2017-12"), "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities." The targeted amendments help simplify certain aspects of hedge accounting and result in a more accurate portrayal of the economics of an entity’s risk management activities in its financial statements. For cash flow and net investment hedges as of the adoption date, the guidance requires a modified retrospective approach. The amended presentation and disclosure guidance is required only prospectively. The amendments are effective for Autodesk's fiscal year beginning February 1, 2019, with early adoption permitted. Autodesk is currently evaluating the accounting, transition, and disclosure requirements of the standard and cannot currently estimate the financial statement impact of adoption. In February 2017, FASB issued Accounting Standards Update No. 2017-05 ("ASU 2017-05"), "Other Income– Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets." The ASU, among other things, clarifies the scope of the derecognition of nonfinancial assets, the definition of in substance financial assets, and impacts the accounting for partial sales of nonfinancial assets by requiring full gain recognition upon the sale. The amendments are effective for Autodesk's fiscal year beginning February 1, 2018. The guidance may be applied retrospectively for all periods presented or retrospectively with a cumulative-effect adjustment at the date of adoption. The effect of the implementation will depend upon the nature of the Company's future acquisitions or dispositions, if any. The adoption of the guidance would not have had a material impact on acquisitions prior to the current period and on the Company's consolidated statements of financial condition and results of operations. In January 2017, FASB issued Accounting Standards Update No. 2017-01 ("ASU 2017-01"), "Business Combinations: Clarifying the Definition of a Business" which provides a more robust framework to use in determining when a set of assets and activities is considered a business. The amendments will be effective for Autodesk's fiscal year beginning February 1, 2018. The new guidance is required to be applied on a prospective basis. The effect of the implementation will depend upon the nature of the Company's future acquisitions, if any. In October 2016, FASB issued Accounting Standards Update No. 2016-16 ("ASU 2016-16"), “Income Taxes: Intra-Entity Transfers of Assets Other than Inventory” which requires that entities recognize the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. The amendments will be effective for Autodesk's fiscal year beginning February 1, 2018. The new guidance is required to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Autodesk is currently evaluating the accounting and disclosure requirements of the standard. Furthermore, the actual impact of implementation will largely depend on future intra-entity asset transfers, if any. In June 2016, FASB issued Accounting Standards Update No. 2016-13 ("ASU 2016-13") regarding ASC Topic 326, "Financial Instruments - Credit Losses," which modifies the measurement of expected credit losses of certain financial instruments. Autodesk plans to adopt ASU 2016-13 as of the effective date which represents Autodesk’s fiscal year beginning February 1, 2020. Autodesk does not believe the ASU will have a material impact on its consolidated financial statements. In February 2016, FASB issued Accounting Standards Update No. 2016-02 ("ASU 2016-02") regarding ASC Topic 842, "Leases." The amendments in this ASU require balance sheet recognition of lease assets and lease liabilities by lessees for leases classified as operating leases, with an optional policy election to not recognize lease assets and lease liabilities for leases with a term of 12 months or less. The amendments also require new disclosures, including qualitative and quantitative requirements, providing additional information about the amounts recorded in the financial statements. Autodesk plans to adopt ASU 2016-02 in Autodesk’s fiscal year beginning February 1, 2019. The amendments require a modified retrospective approach with optional practical expedients. Autodesk is currently evaluating the accounting, transition, and disclosure requirements of the standard and cannot currently estimate the financial statement impact of adoption. In January 2016, FASB issued Accounting Standards Update No. 2016-01 ("ASU 2016-01") regarding ASC Topic 825-10, "Financial Instruments - Overall." The amendments address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments, and require equity securities to be measured at fair value with changes in fair value recognized through net income. The amendments also simplify the impairment assessment of equity investments without readily determinable fair values by requiring a qualitative assessment for impairment quarterly at each reporting period. The amendments in ASU 2016-01 will be effective for Autodesk's fiscal year beginning February 1, 2018. An entity should apply the amendments by means of a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption, with prospective adoption of the amendments related to equity securities without readily determinable fair values existing as of the date of adoption. Autodesk does not believe ASU 2016-01 will have a material impact on its consolidated financial statements. In May 2014, FASB issued Accounting Standards Update No. 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. In August 2015, FASB issued Accounting Standards Update No. 2015-14 to defer the effective date by one year with early adoption permitted as of the original effective date. In addition, FASB issued Accounting Standards Update No. 2016-08, Accounting Standards Update No. 2016-10, Accounting Standards Update No. 2016-12, and Accounting Standard Update No. 2016-20 in March 2016, April 2016, May 2016, and December 2016, respectively, to help provide interpretive clarifications on the new guidance in ASC Topic 606. Autodesk currently plans to adopt ASU 2014-09 as of February 1, 2018, using the modified retrospective transition method. In terms of Autodesk's evaluation efforts, the Company has assigned internal resources in addition to the engagement of third party service providers to assist in the evaluation. The Company's preliminary assessment is that there should be no material change in the timing and amount of the recognition of revenue for the majority of the Company's product subscription offerings and enterprise arrangements. This preliminary assessment is based on the Company's analysis that the related software and cloud services in a majority of the product subscription and enterprise arrangements are not distinct in the context of the contract as they are considered highly interrelated and represent a single combined performance obligation that should be recognized over time. Due to the complexity of certain contracts, the actual revenue recognition treatment required under the new standard for these arrangements may be dependent on contract-specific terms and vary in some instances. A limited number of Autodesk's product subscriptions do not incorporate substantial cloud services, and under ASU 2014-09 will be recognized as distinct license and service performance obligations. Revenue allocated to the licenses in these offerings will be recognized at a point in time instead of over the contract term. While we are still evaluating, Autodesk believes the impact of the change to timing of revenue recognition for these limited offerings, and other revenue streams that Autodesk is currently evaluating, may have a material balance sheet impact on the adoption date with the application of the modified retrospective transition method. It is not expected to have a material impact to reported revenue in subsequent reporting periods. Another significant provision under ASU 2014-09 includes the capitalization and amortization of costs associated with obtaining a contract, such as sales commission. The Company expects there to be a material balance sheet impact at the period of adoption capturing the sales commission capitalization and is currently evaluating the magnitude at implementation. Furthermore, the Company has made and will continue to make investments in systems and processes to enable timely and accurate reporting under the new standard. The Company currently expects that necessary operational and internal control structural changes will be implemented prior to the adoption date.

Concentration of Credit Risk	9 Months Ended
Concentration of Credit Risk	Oct. 31, 2017
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 32% and 31% of Autodesk’s total net revenue for the three months ended October 31, 2017 and 2016, respectively, and 31% and 30% of Autodesk’s total net revenue for the nine months ended October 31, 2017 and 2016, respectively. The majority of the net revenue from sales to Tech Data is for sales made outside of the United States. In addition, Tech Data accounted for 28% and 20% of trade accounts receivable at October 31, 2017 and January 31, 2017, respectively.

Financial Instruments

9 Months Ended

Oct. 31, 2017

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, 2017 and January 31, 2017:



			October 31, 2017
			Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value			Level 1		Level 2			Level 3
Cash equivalents (1):
	Certificates of deposit		63.1		—		—			63.1			63.1		—			—
	Corporate debt securities		8.0		—		—			8.0			8.0		—			—
	Commercial paper		166.5		—		—			166.5			—		166.5			—
	Custody cash deposit		0.9		—		—			0.9			0.9		—			—
	Money market funds		144.8		—		—			144.8			—		144.8			—
	U.S. government securities		250.0		—		—			250.0			250.0		—			—
Marketable securities:
	Short-term available-for-sale
		Agency bonds	7.5		—		—			7.5			7.5		—			—
		Asset backed securities	30.4		—		—			30.4			—		30.4			—
		Certificates of deposit	4.0		—		—			4.0			4.0		—			—
		Commercial paper	31.3		—		—			31.3			—		31.3			—
		Corporate debt securities	218.7		0.1		(0.1		)	218.7			218.7		—			—
		Municipal bonds	15.5				—			15.5			15.5		—			—
		Sovereign debt	6.0		—		—			6.0			—		6.0			—
		U.S. government securities	58.8		—		—			58.8			58.8		—			—
	Short-term trading securities
		Mutual funds	49.1		7.4		—			56.5			56.5		—			—
	Long-term available-for-sale
		Agency bonds	12.2		—		—			12.2			12.2		—			—
		Asset backed securities	60.8		—		(0.1		)	60.7			—		60.7			—
		Corporate debt securities	143.1		0.2		(0.1		)	143.2			143.2		—			—
		Municipal bonds	12.8		—		(0.1		)	12.7			12.7		—			—
		Sovereign debt	2.7		—		—			2.7			—		2.7			—
		U.S. government securities	32.9		—		(0.1		)	32.8			32.8		—			—
Convertible debt securities (2)			8.4		0.6		—			9.0			—		—			9.0
Derivative contract assets (3)			2.4		7.2		(0.5		)	9.1			—		7.1			2.0
Derivative contract liabilities (4)			—		—		(8.9		)	(8.9		)	—		(8.9		)	—
		Total	$	1,329.9	$	15.5	$	(9.9	)	$	1,335.5		$	883.9	$	440.6		$	11.0

____________________


(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” or “Other assets” in the accompanying Condensed Consolidated Balance Sheets.


(4)	Included in “Other accrued liabilities” in the accompanying Condensed Consolidated Balance Sheets.



			January 31, 2017
			Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value			Level 1		Level 2			Level 3
Cash equivalents (1):
	Agency bonds		$	6.0	$	—	$	—		$	6.0		$	6.0	$	—		$	—
	Certificates of deposit		63.1		—		—			63.1			63.1		—			—
	Commercial paper		207.4		—		—			207.4			—		207.4			—
	Corporate debt securities		40.2		—		—			40.2			40.2		—			—
	Custody cash deposit		3.2		—		—			3.2			3.2		—			—
	Money Market funds		256.5		—		—			256.5			—		256.5			—
	Municipal bonds		5.0		—		—			5.0			5.0		—			—
	Sovereign debt		15.0		—		—			15.0			—		15.0			—
	U.S. government securities		309.5		—		—			309.5			309.5		—			—
Marketable securities:
	Short-term available-for-sale
		Agency bonds	13.2		—					13.2			13.2		—			—
		Asset backed securities	19.6		—		—			19.6			—		19.6			—
		Certificates of deposit	157.3		—		—			157.3			157.3		—			—
		Commercial paper	109.2		—		—			109.2			—		109.2			—
		Corporate debt securities	234.7		—		(0.2		)	234.5			234.5		—			—
		Municipal bonds	43.4		—		—			43.4			43.4		—			—
		Sovereign debt	30.0		—		—			30.0			—		30.0			—
		U.S. government securities	32.3		—		—			32.3			32.3		—			—
	Short-term trading securities
		Mutual funds	44.8		2.5		—			47.3			47.3		—			—
	Long-term available-for-sale
		Agency bonds	7.1		—		—			7.1			7.1		—			—
		Asset backed securities	65.8		0.1		—			65.9			—		65.9			—
		Corporate debt securities	172.1		0.1		(0.1		)	172.1			172.1		—			—
		Municipal bonds	10.7		—		—			10.7			10.7		—			—
		Sovereign debt	1.5		—		—			1.5			—		1.5			—
		U.S. government securities	48.8		0.1		—			48.9			48.9		—			—
Convertible debt securities (2)			4.9		2.3		(1.6		)	5.6			—		—			5.6
Derivative contract assets (3)			2.2		12.3		(1.3		)	13.2			—		11.9			1.3
Derivative contract liabilities (4)			—		—		(10.4		)	(10.4		)	—		(10.4		)	—
		Total	$	1,903.5	$	17.4	$	(13.6	)	$	1,907.3		$	1,193.8	$	706.6		$	6.9

____________________


(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.


(4)	Included in “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 nine months ended October 31, 2017.

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, 2017 follows:



	Fair Value Measurements Using Significant Unobservable Inputs
	(Level 3)
		Derivative Contracts			Convertible Debt Securities			Total
Balances, January 31, 2017		$	1.3		$	5.6		$	6.9
Purchases		1.1			5.9			7.0
Losses included in earnings		(0.4		)	(2.4		)	(2.8		)
Losses included in OCI		—			(0.1		)	(0.1		)
Balances, October 31, 2017		$	2.0		$	9.0		$	11.0

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, 2017
	Cost		Fair Value
Due within 1 year	$	377.4	$	377.9
Due in 1 year through 5 years	259.4		259.3
Due in 5 years through 10 years	5.7		5.7
Due after 10 years	2.6		2.6
Total	$	645.1	$	645.5

As of October 31, 2017 and January 31, 2017, Autodesk had no securities, individually and in the aggregate, in a continuous unrealized loss position for greater than twelve months.

As of October 31, 2017 and January 31, 2017, Autodesk had $116.2 million and $117.2 million, respectively, in direct investments in privately held companies accounted for under the cost method, which are periodically assessed for other-than-temporary impairment. Other than the amounts disclosed in the following paragraph, Autodesk does not intend to sell these cost method investments and it is not more likely than not that Autodesk will be required to sell the investment before recovery of the amortized cost bases, which may be maturity. Therefore, Autodesk does not consider those investments to be other-than-temporarily impaired at October 31, 2017. 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 three and nine months ended October 31, 2017, Autodesk recorded $3.9 million and $8.0 million, respectively, in other-than-temporary impairments on its privately held investments. During the three months ended October 31, 2016, Autodesk recorded no other-than-temporary impairments on its privately held investments. During the nine months ended October 31, 2016, Autodesk recorded $0.3 million in other-than-temporary impairments on its privately held investments.

There was no loss or gain for the sales or redemptions of “available-for-sale securities” during the nine months ended October 31, 2017. The sales or redemptions of “available-for-sale securities” during the nine months ended October 31, 2016 resulted in a gain of $0.7 million. 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, 2017 and 2016 were $729.3 million and $1,557.3 million, 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 ongoing 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 $613.6 million at October 31, 2017 and $369.4 million at January 31, 2017. Outstanding contracts are recognized as either assets or liabilities on the balance sheet at fair value. The majority of the net loss of $0.8 million remaining in “Accumulated other comprehensive loss” as of October 31, 2017 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 $189.0 million at October 31, 2017 and $270.6 million at January 31, 2017.

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 “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, 2017 and January 31, 2017:



	Balance Sheet Location	Fair Value at
	Balance Sheet Location	October 31, 2017		January 31, 2017
Derivative Assets
Foreign currency contracts designated as cash flow hedges	Prepaid expenses and other current assets	$	4.4	$	10.1
Derivatives not designated as hedging instruments	Prepaid expenses and other current assets and Other assets	4.7		3.2
Total derivative assets		$	9.1	$	13.3
Derivative Liabilities
Foreign currency contracts designated as cash flow hedges	Other accrued liabilities	$	8.5	$	4.5
Derivatives not designated as hedging instruments	Other accrued liabilities	0.4		6.0
Total derivative liabilities		$	8.9	$	10.5

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, 2017 and 2016 (amounts presented include any income tax effects):



	Foreign Currency Contracts
	Three Months Ended October 31,					Nine Months Ended October 31,
	2017		2016			2017			2016
Amount of gain (loss) recognized in accumulated other comprehensive (loss) income on derivatives (effective portion)	$	2.9	$	1.8		$	(8.5	)	$	(3.1	)
Amount and location of gain (loss) reclassified from accumulated other comprehensive (loss) income into (loss) income (effective portion)
Net revenue	$	2.4	$	1.0		$	7.2		$	8.4
Operating expenses	2.9		1.5			(0.3		)	0.2
Total	$	5.3	$	2.5		$	6.9		$	8.6
Amount and location of gain (loss) recognized in (loss) income on derivatives (ineffective portion and amount excluded from effectiveness testing)
Interest and other expense, net	$	—	$	(0.1	)	$	(0.1	)	$	(0.5	)

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, 2017 and 2016 (amounts presented include any income tax effects):



	Three Months Ended October 31,					Nine Months Ended October 31,
	2017		2016			2017			2016
Amount and location of gain (loss) recognized in (loss) income on derivatives
Interest and other expense, net	$	0.9	$	(1.4	)	$	(7.4	)	$	(12.3	)

Stock-based Compensation Expense

9 Months Ended

Oct. 31, 2017

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

Stock-based Compensation Expense

Restricted Stock Units:

A summary of restricted stock activity for the nine months ended October 31, 2017 is as follows:



	Unvested Restricted Stock Units		Weighted average grant date fair value per share
	(in thousands)
Unvested restricted stock units at January 31, 2017	7,622.4		$	60.13
Granted	2,036.6		106.45
Vested	(3,156.6	)	57.21
Canceled/Forfeited	(534.3	)	67.05
Performance Adjustment (1)	24.7		61.79
Unvested restricted stock units at October 31, 2017	5,992.8		$	78.94

_______________


(1)	Based on Autodesk's financial results and relative total stockholder return for the fiscal 2017 performance period. The performance stock units were attained at rates ranging from 99.7% to 114.7% of the target award.

The fair value of the shares vested during the nine months ended October 31, 2017 and 2016 was $332.8 million and $180.3 million, respectively.

During the nine months ended October 31, 2017, Autodesk granted 1.8 million restricted stock units. Autodesk recorded stock-based compensation expense related to restricted stock units of $51.5 million and $45.2 million during the three months ended October 31, 2017 and 2016, respectively. Autodesk recorded stock-based compensation expense related to restricted stock units of $153.5 million and $125.5 million during the nine months ended October 31, 2017 and 2016, respectively. The $153.5 million of stock-based compensation expense for the nine months ended October 31, 2017 includes $9.1 million related to the acceleration of eligible restricted stock awards in conjunction with the Company's CEO transition.

During the nine months ended October 31, 2017, Autodesk granted 0.2 million performance stock units 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. During the period, we granted two different types of performance stock units.

The performance criteria for the first type of performance stock units were based on a mix of net subscription additions, Annualized Recurring Revenue ("ARR"), non-GAAP total spend, and total subscription renewal rate goals adopted by the Compensation and Human Resource Committee, as well as total stockholder return compared against companies in the S&P Computer Software Select Index or the S&P North American Technology Software Index (“Relative TSR”). These performance stock units vest over a three-year period and have the following vesting schedule:


•	Up to one third of the performance stock units may vest following year one, depending upon the achievement of the performance criteria for fiscal 2018 as well as 1-year Relative TSR (covering year one).


•	Up to one third of the performance stock units may vest following year two, depending upon the achievement of the performance criteria for year two as well as 2-year Relative TSR (covering years one and two).


•	Up to one third of the performance stock units may vest following year three, depending upon the achievement of the performance criteria for year three as well as 3-year Relative TSR (covering years one, two and three).

The performance criteria for the second type of performance stock units granted to our Chief Executive Officer during the nine months ended October 31, 2017 were based on fiscal 2020 free cash flow per share and ARR goals adopted by the Compensation and Human Resource Committee. These performance stock units vest in March 2020 based on the Company’s fiscal 2020 performance against the performance criteria.

Performance 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. Autodesk has determined the grant date fair value for these awards using stock price on the date of grant or if the awards are also subject to a market condition, a Monte Carlo simulation

model. The fair value of the performance stock units is expensed using the accelerated attribution over the vesting period. Autodesk recorded stock-based compensation expense related to performance stock units of $7.1 million and $4.9 million for the three months ended October 31, 2017 and 2016, respectively. Autodesk recorded stock-based compensation expense related to performance stock units of $27.7 million and $17.1 million for the nine months ended October 31, 2017 and 2016, respectively. The $27.7 million of stock-based compensation expense for the nine months ended October 31, 2017 includes $7.5 million related to the acceleration of eligible performance stock awards in conjunction with the Company's CEO transition.

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 85% of the lower of Autodesk's closing price (fair market value) on the offering date or the exercise date. The offering period for ESPP awards consists of four, six-month exercise periods within a 24-month offering period.

A summary of the ESPP activity for three and nine months ended October 31, 2017 and 2016 is as follows:



	Three Months Ended October 31,				Nine Months Ended October 31,
	2017		2016		2017		2016
Issued shares	0.9		1.1		2.0		2.3
Average price of issued shares	$	39.92	$	37.36	$	39.03	$	36.99
Weighted average grant date fair value of awards granted under the ESPP (1)	$	33.04	$	20.75	$	32.41	$	19.20

_______________


(1)	Calculated as of the award grant date using the Black-Scholes Merton (“BSM") option pricing model.

Stock-based Compensation Expense

The following table summarizes stock-based compensation expense for the three and nine months ended October 31, 2017 and 2016, respectively, as follows:



	Three Months Ended October 31,					Nine Months Ended October 31,
	2017			2016		2017			2016
Cost of maintenance and subscription revenue (1)	$	2.8		$	2.2	$	8.5		$	6.2
Cost of license and other revenue (1)	1.0			1.3		3.1			4.1
Marketing and sales	27.7			24.2		80.1			69.0
Research and development	20.1			20.9		61.7			60.0
General and administrative	13.5			8.0		46.1			23.2
Stock-based compensation expense related to stock awards and ESPP purchases	65.1			56.6		199.5			162.5
Tax benefit	(1.3		)	—		(1.6		)	—
Stock-based compensation expense related to stock awards and ESPP purchases, net of tax	$	63.8		$	56.6	$	197.9		$	162.5

_______________


(1)	Prior periods have been adjusted to conform with the current period's presentation. See Note 1, "Basis of Presentation," for additional information.

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 uses 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, 2017		Three Months Ended October 31, 2016
	Performance Stock Unit (1)	ESPP	Performance Stock Unit (1)	ESPP
Range of expected volatilities	N/A	31.7 - 33.4%	N/A	31.0 - 33.9%
Range of expected lives (in years)	N/A