Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		8 Months Ended
	May 12, 2019	May 13, 2018	May 12, 2019	May 13, 2018
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTERESTS	$ 916	$ 762	$ 2,594	$ 2,126
Foreign-currency translation adjustment and other, net	(42)	(149)	(124)	(22)
Comprehensive income	874	613	2,470	2,104
Less: Comprehensive income attributable to noncontrolling interests	9	4	30	37
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	$ 865	$ 609	$ 2,440	$ 2,067