Annual report pursuant to Section 13 and 15(d)

Retirement Benefits Plans (Estimated Future Benefit Payments) (Details)

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Retirement Benefits Plans (Estimated Future Benefit Payments) (Details) (USD $)
In Millions, unless otherwise specified
Jan. 28, 2012
Jan. 29, 2011
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]    
2012 $ 4  
2013 3  
2014 3  
2015 3  
2016 3  
2017-2021 10  
Benefits Plan Primary Plan [Member]
   
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]    
2012 284  
2013 302  
2014 302  
2015 307  
2016 312  
2017-2021 1,662  
Benefits Supplemental Plan [Member]
   
Defined Benefit Plan, Estimated Future Benefit Payments [Abstract]    
2012 46 29
2013 45  
2014 42  
2015 40  
2016 34  
2017-2021 $ 82