Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Nov. 25, 2018	Nov. 26, 2017
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTERESTS	$ 777	$ 651
Foreign-currency translation adjustment and other, net	(134)	(23)
Comprehensive income	643	628
Less: Comprehensive income attributable to noncontrolling interests	8	11
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	$ 635	$ 617