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Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Aug. 28, 2016	Aug. 30, 2015	Aug. 31, 2014
Statement of Comprehensive Income [Abstract]
NET INCOME INCLUDING NONCONTROLLING INTERESTS	$ 2,376	$ 2,409	$ 2,088
Foreign-currency translation adjustment and other, net	26	(1,063)	49
Comprehensive income	2,402	1,346	2,137
Less: Comprehensive income attributable to noncontrolling interests	30	14	33
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO	$ 2,372	$ 1,332	$ 2,104

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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