Consolidated Statement Of Shareholders' Equity (USD $) In Thousands	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 Aug. 27, 2011	$ 51			$ 16			$ 439,035	$ 775,149	$ (2,085)	$ (219,054)	$ 993,112
Balance, Shares at Aug. 27, 2011	51,123			16,400						4,723
Exchange of Class B common stock for Class A common stock, Shares	840			(840)
Exchange of Class B common stock for Class A common stock, Value	1										1
Exercise of common stock options, including income tax benefits, Shares	538
Exercise of common stock options, including income tax benefits, Value	1						27,797				27,798
Common stock issued under associate stock purchase plan, Shares										(52)
Common stock issued under associate stock purchase plan, Value							1,397			1,990	3,387
Issuance of restricted common stock, net of cancellations, Shares	81
Stock-based compensation							15,262				15,262
Purchase of treasury stock, Shares										671
Purchase of treasury stock, Value										(48,098)	(48,098)
Cash dividends paid on common stock		(46,926)	(46,926)		(16,098)	(16,098)
Issuance of dividend equivalent units							191	(191)
Foreign currency translation adjustments									(358)		(358)
Net income								259,031			259,031
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 restricted common stock, net of cancellations, 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 restricted common stock, net of cancellations, 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