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Goodwill - Additional Information (Detail)	Apr. 30, 2011 Year Entity Investment
Goodwill [Line Items]
Number of reporting units	4

X

- Definition

Number of Reportable Business Segments

+ Details

Name:	adsk_NumberOfReportableBusinessSegments
Namespace Prefix:	adsk
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

Name:	us-gaap_GoodwillLineItems
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration