Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Jan. 31, 2020	Mar. 13, 2020	Jul. 31, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jan. 31, 2020
Document Transition Report	false
Entity File Number	0-14338
Entity Registrant Name	AUTODESK, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-2819853
Entity Address, Address Line One	111 McInnis Parkway,
Entity Address, City or Town	San Rafael,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94903
City Area Code	415
Local Phone Number	507-5000
Title of 12(b) Security	Common Stock, $0.01 Par Value
Trading Symbol	ADSK
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 34.3
Entity Common Stock, Shares Outstanding		219,521,425	219,800,000
Documents Incorporated by Reference	Portions of the Proxy Statement for registrant’s Annual Meeting of Stockholders (the “Proxy Statement”), are incorporated by reference in Part III of this Form 10-K to the extent stated herein. The Proxy Statement will be filed within 120 days of the registrant’s fiscal year ended January 31, 2020
Entity Central Index Key	0000769397
Current Fiscal Year End Date	--01-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false