Condensed Consolidated Statements Of Income (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 16, 2014	Feb. 17, 2013	Feb. 16, 2014	Feb. 17, 2013
REVENUE
Net sales	$ 25,756	$ 24,343	$ 50,224	$ 47,547
Membership fees	550	528	1,099	1,039
Total revenue	26,306	24,871	51,323	48,586
OPERATING EXPENSES
Merchandise costs	23,043	21,766	44,867	42,492
Selling, general and administrative	2,531	2,361	5,032	4,693
Preopening expenses	8	6	32	24
Operating income	724	738	1,392	1,377
OTHER INCOME (EXPENSE)
Interest expense	(26)	(25)	(53)	(38)
Interest income and other, net	30	26	48	46
INCOME BEFORE INCOME TAXES	728	739	1,387	1,385
Provision for income taxes	255	185	483	410
Net income including noncontrolling interests	473	554	904	975
Net income attributable to noncontrolling interests	(10)	(7)	(16)	(12)
NET INCOME ATTRIBUTABLE TO COSTCO	$ 463	$ 547	$ 888	$ 963
NET INCOME PER COMMON SHARE ATTRIBUTABLE TO COSTCO:
Basic (in dollars per share)	$ 1.05	$ 1.26	$ 2.02	$ 2.22
Diluted (in dollars per share)	$ 1.05	$ 1.24	$ 2.01	$ 2.19
Shares used in calculation (000's)
Basic (shares)	439,776	435,975	438,868	434,698
Diluted (shares)	442,829	439,812	442,627	439,222
CASH DIVIDENDS DECLARED PER COMMON SHARE	$ 0.31	$ 7.275	$ 0.62	$ 7.55