Significant Accounting Policies - Revenue Recognition and Other Licensing Matters (Details) - claims	Dec. 31, 2017	Jun. 30, 2017
Accounting Policies [Abstract]
Software Licensing, Indemnification Obligations, Number of Claims Outstanding	0	0

Represents the number of claims outstanding related to indemnification obligations.

No definition available.

Name:	azpn_SoftwareLicensingIndemnificationObligationsNumberOfClaimsOutstanding
Namespace Prefix:	azpn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant