Consolidated Statement Of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Restricted Stock [Member] Class A Common Stock [Member] Common Stock [Member]	Restricted Stock Units [Member] Class A Common Stock [Member] Common Stock [Member]	Restricted Stock Units [Member] Additional Paid-In Capital [Member]	Restricted Stock Units [Member]	Class A Common Stock [Member] Common Stock [Member]	Class A Common Stock [Member] Retained Earnings [Member]	Class A Common Stock [Member]	Class B Common Stock [Member] Common Stock [Member]	Class B Common Stock [Member] Retained Earnings [Member]	Class B Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Class A Treasury Stock [Member]	Total
Balance, Value at Sep. 01, 2012					$ 53			$ 16			$ 483,682	$ 970,965	$ (2,443)	$ (265,162)	$ 1,187,111
Balance, Shares at Sep. 01, 2012					52,582			15,560						5,342
Exchange of Class B common stock for Class A common stock, Shares					1,419			(1,419)
Exchange of Class B common stock for Class A common stock, Value					$ 2			$ (2)
Exercise of common stock options, including income tax benefits, Shares					504
Exercise of common stock options, including income tax benefits, Value											27,285				27,285
Common stock issued under associate stock purchase plan, Shares														(53)
Common stock issued under associate stock purchase plan, Value											1,747			$ 2,038	3,785
Issuance of stock in relation to stock-based compensation plans, Value			$ 232	$ 232
Issuance of stock in relation to stock-based compensation plans, Shares	129
Stock-based compensation											15,824				15,824
Purchase of treasury stock, Shares														52
Purchase of treasury stock, Value														$ (3,773)	(3,773)
Cash dividends paid on common stock						$ (58,245)	$ (58,245)		$ (17,615)	$ (17,615)
Issuance of dividend equivalent units												(232)			(232)
Foreign currency translation adjustments													(1,984)		(1,984)
Net income												237,995			237,995
Balance, Value at Aug. 31, 2013					$ 55			$ 14			528,770	1,132,868	(4,427)	$ (266,897)	1,390,383
Balance, Shares at Aug. 31, 2013					54,634			14,141						5,341
Exchange of Class B common stock for Class A common stock, Shares					845			(845)
Exchange of Class B common stock for Class A common stock, Value					$ 1			$ (1)
Exercise of common stock options, including income tax benefits, Shares					402
Exercise of common stock options, including income tax benefits, Value											26,020				26,020
Common stock issued under associate stock purchase plan, Shares														(54)
Common stock issued under associate stock purchase plan, Value											1,992			$ 2,006	3,998
Issuance of stock in relation to stock-based compensation plans, Value			260	260
Issuance of stock in relation to stock-based compensation plans, Shares	99
Stock-based compensation											16,688				16,688
Purchase of treasury stock, Shares														2,370
Purchase of treasury stock, Value														$ (191,359)	(191,359)
Cash dividends paid on common stock						(64,393)	(64,393)		(18,214)	(18,214)
Issuance of dividend equivalent units												(260)			(260)
Foreign currency translation adjustments													(627)		(627)
Net income												236,067			236,067
Balance, Value at Aug. 30, 2014					$ 56			$ 13			573,730	1,286,068	(5,054)	$ (456,250)	1,398,563
Balance, Shares at Aug. 30, 2014					55,980			13,296						7,657
Exercise of common stock options, including income tax benefits, Shares					185
Exercise of common stock options, including income tax benefits, Value											14,418				14,418
Common stock issued under associate stock purchase plan, Shares														(63)
Common stock issued under associate stock purchase plan, Value											1,854			$ 2,431	4,285
Issuance of stock in relation to stock-based compensation plans, Value			$ 708	$ 708
Issuance of stock in relation to stock-based compensation plans, Shares	97	138
Stock-based compensation											14,195				14,195
Purchase of treasury stock, Shares														444
Purchase of treasury stock, Value														$ (33,414)	(33,414)
Cash dividends paid on common stock						$ (223,071)	$ (223,071)		$ (61,160)	$ (61,160)
Issuance of dividend equivalent units												(764)			(764)
Foreign currency translation adjustments													(12,198)		(12,198)
Net income												231,308			231,308
Balance, Value at Aug. 29, 2015					$ 56			$ 13			$ 604,905	$ 1,232,381	$ (17,252)	$ (487,233)	$ 1,332,870
Balance, Shares at Aug. 29, 2015					56,400			13,296						8,038