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Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Sep. 02, 2018	Sep. 03, 2017	Aug. 28, 2016
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTERESTS	$ 3,179	$ 2,714	$ 2,376
Foreign-currency translation adjustment and other, net	(192)	98	26
Comprehensive income	2,987	2,812	2,402
Less: Comprehensive income attributable to noncontrolling interests	38	48	30
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	$ 2,949	$ 2,764	$ 2,372

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