Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands		8 Months Ended	12 Months Ended
	Dec. 31, 2017	Aug. 25, 2018	Aug. 31, 2019	Aug. 25, 2018	Aug. 26, 2017	Aug. 27, 2016
Operating Loss Carryforwards [Line Items]
U.S. corporate income tax rate	35.00%	21.00%		25.90%	35.00%	35.00%
Tax benefit from reduction of U.S. statutory rate				$ 119,200
Excess tax benefits from stock option exercises				31,300	$ 31,200
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
Deferred tax assets from net operating loss carryforwards		$ 30,900		30,900	30,800
Future taxable income				$ 219,100	198,200
Expiration date of NOLs start year				2019
Expiration date of NOLs end year				2038
Deferred tax assets for income tax credit carryforwards		16,300		$ 16,300	17,200
Expiration date of tax credit carryforwards start year				2023
Expiration date of tax credit carryforwards end year				2028
Operating loss carryforwards expiration period description				fiscal 2019 through 2038
Tax credit carryforwards expiration period description				fiscal 2023 through 2028
Valuation allowances on deferred tax assets		19,619		$ 19,619	13,501
Unrecognized tax benefits, if recognized would reduce effective tax rate, amount		13,500		13,500	9,900
Accrued for payment of interest and penalties associated with unrecognized tax benefits		700		700	$ 1,200
Amount of unrecognized tax benefits that could be reduced over next twelve months		$ 1,100		$ 1,100
Scenario, Plan [Member]
Operating Loss Carryforwards [Line Items]
U.S. corporate income tax rate			21.00%