Guarantor/Non Guarantor - Additional Information (Detail)	9 Months Ended
May. 31, 2015
Guarantor Obligations [Line Items]
Percentage of ownership in subsidiaries	100.00%

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.

No definition available.

Name:	us-gaap_GuaranteeObligationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration