Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Reconciliation of Unrecognized Tax Benefits [Roll Forward]      
Beginning balance $ 70 $ 76 $ 110
Additions for tax positions of prior years 10 6 5
Reductions for tax positions of prior years 0 (1) (11)
Settlements and effective settlements with tax authorities (16) (9) (24)
Expirations of statute (2) (2) (4)
Balance at end of year $ 62 $ 70 $ 76