Stock-Based Compensation (Stock Options Exercised) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Share-based Compensation [Abstract]      
Proceeds from stock options exercised $ 0 $ 7 $ 71
Intrinsic value of stock options exercised 0 2 38
Tax benefit related to stock-based compensation 0 0 15
Excess tax benefits from stock-based compensation $ 0 $ 0 $ 12