Recently Issued Accounting Standards (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Debt issuance costs reclassified to a reduction in long-term notes payable, net	$ 3.9

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