Stockholders' Equity (Reclassifications Out of Accumulated Other Comprehensive Income/ (Loss) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
May 04, 2013
Apr. 28, 2012
Actuarial loss/(gain) $ 44 $ 64
Prior service cost/(credit) (1) (4)
Tax expense/(benefit) (17) (38)
Total other comprehensive income 30 65
Total reclassifications 27 38
Total Amortization Of Retirement Benefit Plans, Net Of Tax [Member]
   
Total other comprehensive income 27 38
SG&A [Member]
   
Prior service cost/(credit) (2) [1] (4) [1]
Primary and Supplemental Pension Plan Total [Member]
   
Actuarial loss/(gain) 44 [1] 64 [1]
Prior service cost/(credit) 1 [1]  
Income Tax Expense/ (Benefit) [Member]
   
Tax expense/(benefit) $ (16) $ (22)
[1] These accumulated other comprehensive components are included in the computation of net periodic benefits expense/(income). See Note 7 for additional details.