Derivatives and Risk Management (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Nov. 30, 2011	Nov. 30, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before taxes for fair value hedges	$ 3,775	$ 13,668
Foreign Exchange [Member] \| SG&A expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before taxes for fair value hedges	2,570	(7,887)
Interest Rate [Member] \| Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before taxes for fair value hedges	$ 1,205	$ 21,555

The amount recognized in earnings related to the change in fair value during the period of derivative or nonderivative instruments designated as fair value hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration