Sales of Accounts Receivable (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			36 Months Ended
	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2011 Domestic country sale of accounts receivable [Member]	Dec. 26, 2014 Domestic country sale of accounts receivable [Member]	Aug. 31, 2011 Domestic country sale of accounts receivable [Member]	Nov. 30, 2011 International [Member]	Aug. 31, 2011 International [Member]
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Accounts receivable sold			$ 524.9		$ 557.0	$ 180.0	$ 132.2
Advance payment received on sale of account receivable			50.0		50.0
Outstanding deferred purchase price of receivables sold			474.9		507.0
Fair value of deferred purchase price			463.7		494.7
Current advance limit for receivables sold			100
Maximum advance limit for receivables sold				200
Proceed from sales of receivables	528.9	285.5
Cash payment to owners of receivables	481.1	263.5
Discount on domestic and international sales of accounts receivables	$ 1.7	$ 1.2