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

New Accounting Pronouncement or Change in Accounting Principle, Debt Issuance Costs Reclassified to a Reduction in Long-term Notes Payable, Net

No definition available.

Name:	adsk_NewAccountingPronouncementorChangeinAccountingPrincipleDebtIssuanceCostsReclassifiedtoaReductioninLongtermNotesPayableNet
Namespace Prefix:	adsk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant