Stockholders' Equity (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 27, 2012
Oct. 29, 2011
Oct. 27, 2012
Oct. 29, 2011
January 28, 2012     $ 4,010  
Net income/(loss) (123) (143) (433) (65)
Other comprehensive income/(loss) (52) (8) (120) 60
Dividends declared, common     (47)  
Stock-based compensation     92  
October 27, 2012 3,502   3,502  
Common Stock [Member]
       
January 28, 2012, shares     215.9  
January 28, 2012     108  
Stock-based compensation     2  
Stock-based compensation, shares     3.3  
October 27, 2012, shares 219.2   219.2  
October 27, 2012 110   110  
Additional Paid-in Capital [Member]
       
January 28, 2012     3,699  
Stock-based compensation     90  
October 27, 2012 3,789   3,789  
Reinvested Earnings [Member]
       
January 28, 2012     1,412  
Net income/(loss)     (433)  
Dividends declared, common     (47)  
October 27, 2012 932   932  
Accumulated Other Comprehensive (Loss)/Income [Member]
       
January 28, 2012     (1,209)  
Other comprehensive income/(loss)     (120)  
October 27, 2012 $ (1,329)   $ (1,329)