Stockholders' Equity (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 28, 2012
Jul. 30, 2011
January 28, 2012     $ (1,209)  
Net income/(loss) (147) 14 (310) 78
Other comprehensive income/(loss) (133) 26 (68) 68
July 28, 2012 (1,277)   (1,277)  
Common Stock [Member]
       
January 28, 2012, shares     215.9  
January 28, 2012     108  
Stock-based compensation     1  
Stock-based compensation, shares     2.9  
July 28, 2012, shares 218.8   218.8  
July 28, 2012 109   109  
Additional Paid-in Capital [Member]
       
January 28, 2012     3,699  
Stock-based compensation     83  
July 28, 2012 3,782   3,782  
Reinvested Earnings [Member]
       
January 28, 2012     1,412  
Net income/(loss)     (310)  
Dividends declared, common     (45)  
July 28, 2012 1,057   1,057  
Accumulated Other Comprehensive (Loss)/Income [Member]
       
January 28, 2012     (1,209)  
Other comprehensive income/(loss)     (68)  
July 28, 2012 $ (1,277)   $ (1,277)