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Consolidated Statements Of Cash Flows (USD $)
In Millions
12 Months Ended
Aug. 28, 2011
Aug. 29, 2010
Aug. 30, 2009
CASH FLOWS FROM OPERATING ACTIVITIES   
Net income including noncontrolling interests$ 1,542[1]$ 1,323$ 1,099
Adjustments to reconcile net income including noncontrolling interests to net cash provided by operating activities:   
Depreciation and amortization855795728
Stock-based compensation207190181
Undistributed equity earnings in joint ventures(1)(42)(33)
Excess tax benefits on stock-based awards(45)(10)(2)
Other non-cash operating activities, net24246
Deferred income tax expense84770
Changes in operating assets and liabilities, net of the initial consolidation of Costco Mexico at the beginning of fiscal 2011:   
Increase in merchandise inventories(642)(213)(394)
Increase in accounts payable804445255
Other operating assets and liabilities, net370283142
Net cash provided by operating activities3,1982,7802,092
CASH FLOWS FROM INVESTING ACTIVITIES   
Additions to property and equipment(1,290)(1,055)(1,250)
Increase resulting from initial consolidation of Costco Mexico16500
Proceeds from the sale of property and equipment1647
Purchases of short-term investments(3,276)(2,693)(1,806)
Maturities of short-term investments2,6141,4281,780
Sales of investments602309183
Other investing activities, net(11)(8)(15)
Net cash used in investing activities(1,180)(2,015)(1,101)
CASH FLOWS FROM FINANCING ACTIVITIES   
Change in bank checks outstanding(514)5(22)
Repayments of short-term borrowings(105)(73)(1,777)
Proceeds from short-term borrowings79811,669
Repayments of long-term debt0(84)(6)
Cash dividend payments(389)(338)(296)
Investment by (distribution to) noncontrolling interests90(9)
Excess tax benefits on stock-based awards45102
Proceeds from stock-based awards, net of minimum tax withholdings22419369
Repurchases of common stock(624)(551)(69)
Other financing activities, net(2)380
Net cash used in financing activities(1,277)(719)(439)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS5411(14)
Net increase in cash and cash equivalents79557538
CASH AND CASH EQUIVALENTS BEGINNING OF YEAR3,2143,1572,619
CASH AND CASH EQUIVALENTS END OF YEAR4,0093,2143,157
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:   
Interest (reduced by $9, $11, and $8 interest capitalized in 2011, 2010, and 2009, respectively)111110104
Income taxes742637565
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:   
(Decrease) Increase in accrued property and equipment(10)2420
Common stock issued upon conversion of 3.5% Zero Coupon Convertible Subordinated Notes2119
Property acquired under capital leases09072
Unsettled repurchases of common stock$ 17$ 17$ 0
[1] As discussed in Note 1, the Company began consolidating Mexico on August 30, 2010.