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Revenue (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Aug. 04, 2018
May 05, 2018
Jul. 29, 2017
Aug. 04, 2018
Jul. 29, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Cumulative effect of adopted accounting standards $ 0   $ 0 $ 5 $ 0
Net sales 3,980   $ 3,717 7,450 $ 6,996
Revenue recognized from beginning contract liability balance 77     228  
Loyalty Program [Member]          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Performance obligations $ 149     $ 149  
Average period between issuance and redemption       6 months  
Rate of unredeemed performance obligations 6.00%     6.00%  
Gift Cards [Member]          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Performance obligations $ 296     $ 296  
Average period between issuance and redemption       2 years  
Rate of unredeemed performance obligations 2.00%     2.00%  
Excluding Impact of Revenue Standard [Member]          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Net sales $ 3,950     $ 7,402  
Accounting Standards Update 2014-09 [Member]          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Cumulative effect of adopted accounting standards   $ 55   $ 55