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Changes in Equity Attributes to Costco and the Noncontrolling Interests of Consolidated Subsidiaries (Details) - USD ($) $ in Millions | 3 Months Ended | 8 Months Ended
--- | --- | ---
May 07, 2017 | May 08, 2016 | May 07, 2017 | May 08, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Equity at beginning of period |  |  | $ 12,332 | $ 10,843
Comprehensive income: |  |  |  |
Net income | $ 706 | $ 549 | 1,782 | 1,591
Foreign-currency translation adjustment and other, net | 21 | 224 | (210) | (5)
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO | 712 | 763 | 1,538 | 1,566
Comprehensive income (loss), net of tax, attributable to noncontrolling interest | 15 | 10 | 34 | 20
Comprehensive income | 727 | 773 | 1,572 | 1,586
Stock-based compensation |  |  | 404 | 362
Release of vested restricted stock units (RSUs), including tax effects |  |  | (165) | (145)
Repurchases of common stock | (45) | (136) | (233) | (346)
Cash dividends declared |  |  | (3,725) | (549)
Distribution to noncontrolling interest |  |  |  | (3)
Equity at end of period | 10,185 | 11,748 | 10,185 | 11,748
Attributable to Costco |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Equity at beginning of period |  |  | 12,079 | 10,617
Comprehensive income: |  |  |  |
Net income |  |  | 1,760 | 1,571
Foreign-currency translation adjustment and other, net |  |  | (222) | (5)
COMPREHENSIVE INCOME ATTRIBUTABLE TO COSTCO |  |  | 1,538 | 1,566
Stock-based compensation |  |  | 404 | 362
Release of vested restricted stock units (RSUs), including tax effects |  |  | (165) | (145)
Repurchases of common stock |  |  | (233) | (346)
Cash dividends declared |  |  | (3,725) | (549)
Equity at end of period | 9,898 | 11,505 | 9,898 | 11,505
Noncontrolling Interests |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Equity at beginning of period |  |  | 253 | 226
Comprehensive income: |  |  |  |
Net income |  |  | 22 | 20
Foreign-currency translation adjustment and other, net |  |  | 12 | 0
Comprehensive income (loss), net of tax, attributable to noncontrolling interest |  |  | 34 | 20
Distribution to noncontrolling interest |  |  |  | (3)
Equity at end of period | $ 287 | $ 243 | $ 287 | $ 243

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831223 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 + Details
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