Income Taxes - Reconciliation of Provision for Income Taxes (Details)	12 Months Ended
	Aug. 31, 2019	Aug. 25, 2018	Aug. 26, 2017
Income Tax Disclosure [Abstract]
Income taxes at the statutory federal income tax rate	21.00%	25.90%	35.00%
State income taxes	4.30%	4.10%	3.50%
Other	(0.60%)	(2.80%)	0.50%
Deemed Repatriation of Non—U.S. Earnings, net foreign tax credits and other (collectively, Transition Tax)	0.00%	1.40%	0.00%
Impact of U.S. tax reform federal tax rate reduction	0.00%	(16.10%)	0.00%
Total	24.70%	12.50%	39.00%