Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Sep. 01, 2019	Sep. 02, 2018	Sep. 03, 2017
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTERESTS	$ 3,704	$ 3,179	$ 2,714
Foreign-currency translation adjustment and other, net	(245)	(192)	98
Comprehensive income	3,459	2,987	2,812
Less: Comprehensive income attributable to noncontrolling interests	37	38	48
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	$ 3,422	$ 2,949	$ 2,764