Amounts Reclassified out of Accumulated Other Comprehensive Loss (Detail) - Entity [Domain] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2015	May. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Revenue	$ 714,606	$ 593,285	$ 1,839,813	$ 1,585,856
Interest and foreign exchange	(4,285)	(5,437)	(9,355)	(14,280)
Earnings before income taxes and earnings from unconsolidated affiliates	100,126	62,101	242,010	126,082
Tax expense	(30,783)	(16,303)	(76,209)	(36,708)
Net of tax	69,343	45,798	165,801	89,374
Unrealized Losses on Derivative Financial Instruments | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Earnings before income taxes and earnings from unconsolidated affiliates	(210)	111	831	700
Tax expense	(44)	(107)	(414)	(379)
Net of tax	(254)	4	417	321
Unrealized Losses on Derivative Financial Instruments | Reclassification out of Accumulated Other Comprehensive Income | Foreign Exchange Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Revenue	(652)	(335)	(518)	(575)
Unrealized Losses on Derivative Financial Instruments | Reclassification out of Accumulated Other Comprehensive Income | Interest rate swap contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest and foreign exchange	$ 442	$ 446	$ 1,349	$ 1,275