Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 16, 2020	Feb. 17, 2019	Feb. 16, 2020	Feb. 17, 2019
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTERESTS	$ 947	$ 901	$ 1,803	$ 1,678
Foreign-currency translation adjustment and other, net	47	52	172	(82)
Comprehensive income	994	953	1,975	1,596
Less: Comprehensive income attributable to noncontrolling interests	22	13	44	21
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	$ 972	$ 940	$ 1,931	$ 1,575