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Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 14, 2021	Feb. 16, 2020	Feb. 14, 2021	Feb. 16, 2020
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTERESTS	$ 971	$ 947	$ 2,152	$ 1,803
Foreign-currency translation adjustment and other, net	148	47	357	172
Comprehensive income	1,119	994	2,509	1,975
Less: Comprehensive income attributable to noncontrolling interests	28	22	56	44
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	$ 1,091	$ 972	$ 2,453	$ 1,931

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