Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands			12 Months Ended
	Dec. 22, 2017	Dec. 21, 2017	Aug. 29, 2020	Aug. 31, 2019	Aug. 25, 2018
Income Taxes
U.S. corporate income tax rate	21.00%	35.00%	21.00%	21.00%	25.90%
Tax cuts and jobs act of 2017, incomplete accounting, provisional income tax expense (benefit)				$ 8,800	$ 131,500
Tax Cuts And Jobs Act of 2017 incomplete accounting provisional income tax expense benefit					157,300
Tax cuts and jobs act of 2017, transition tax, provisional income tax expense					25,800
Additional excess tax benefits from stock option exercises compared to prior year			$ 20,900	46,000	$ 31,300
Deferred tax assets from net operating loss carryforwards			32,200	29,900
Future taxable income			$ 247,100	226,300
Expiration date of NOLs start year			2021
Expiration date of NOLs end year			2040
Deferred tax assets for income tax credit carryforwards			$ 9,200	13,000
Expiration date of tax credit carryforwards start year			2021
Expiration date of tax credit carryforwards end year			2037
Valuation allowances on deferred tax assets			$ 28,373	23,923
Unrecognized tax benefits, if recognized would reduce effective tax rate, amount			18,900	16,800
Deferred tax assets operating loss carryforwards and tax credits			10,500	11,900
Accrued for payment of interest and penalties associated with unrecognized tax benefits			1,600	$ 1,400
Amount of unrecognized tax benefits that could be reduced over next twelve months			$ 1,500