Sales Of Accounts Receivable (Activity of Deferred Purchase Price Receivables) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Nov. 30, 2013	Aug. 31, 2013	Nov. 30, 2013 Deferred Purchase Price Receivables [Member]	Nov. 30, 2012 Deferred Purchase Price Receivables [Member]	Nov. 30, 2013 Domestic [Member] Deferred Purchase Price Receivables [Member]	Nov. 30, 2012 Domestic [Member] Deferred Purchase Price Receivables [Member]	Nov. 30, 2013 Australia [Member] Deferred Purchase Price Receivables [Member]	Nov. 30, 2012 Australia [Member] Deferred Purchase Price Receivables [Member]	Nov. 30, 2013 Europe [Member] Deferred Purchase Price Receivables [Member]	Nov. 30, 2012 Europe [Member] Deferred Purchase Price Receivables [Member]
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Beginning balance	$ 927,100	$ 989,694	$ 453,252	$ 515,481	$ 358,822	$ 396,919	$ 64,996	$ 70,073	$ 29,434	$ 48,489
Transfers of accounts receivable			1,037,205	1,206,746	840,571	936,630	73,120	126,908	123,514	143,208
Collections			(1,042,922)	(1,186,356)	(847,878)	(928,556)	(65,804)	(119,820)	(129,240)	(137,980)
Program termination			(72,312)		0		(72,312)		0
Ending balance	$ 927,100	$ 989,694	$ 375,223	$ 535,871	$ 351,515	$ 404,993	$ 0	$ 77,161	$ 23,708	$ 53,717