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Income Taxes (Provision for Income Taxes) (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 29, 2017
Jan. 31, 2016
Feb. 01, 2015
Current:      
Federal $ 3,870 $ 3,228 $ 2,884
State 462 466 373
Foreign 315 296 258
Total Current 4,647 3,990 3,515
Deferred:      
Federal (102) 21 127
State 13 10 (11)
Foreign (24) (9) 0
Total Deferred (113) 22 116
Total $ 4,534 $ 4,012 $ 3,631