Income Taxes - Reconciliation of Provision for Income Taxes (Detail)			12 Months Ended
	Dec. 22, 2017	Dec. 21, 2017	Aug. 29, 2020	Aug. 31, 2019	Aug. 25, 2018
Income Taxes
Federal tax at statutory U.S. income tax rate	21.00%	35.00%	21.00%	21.00%	25.90%
State income taxes, net			2.20%	2.00%	1.90%
Transition tax					1.6
Share-based compensation			(0.70%)	(1.80%)	(1.60%)
Impact of tax reform				(0.40%)	(9.60%)
Global intangible lower-taxed income ("GILTI")			1.00%	1.30%
Foreign Tax Credits			(1.10%)	(1.10%)
Other			(0.60%)	(0.60%)	0.10%
Effective tax rate			21.80%	20.40%	18.30%