Commitments and Contingencies (Details) - USD ($) $ in Millions	Feb. 29, 2016	Aug. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Outstanding surety bonds	$ 11
Letters of credit outstanding	$ 57	$ 41

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant