Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Defined Contribution Plans) (Details)

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Retirement Benefit Plans (Defined Contribution Plans) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Defined Benefit Plan, Accumulated Other Comprehensive Income, Net Gains (Losses), Before Tax $ (2,285) $ (1,568)  
Savings Plan - 401(k) 52 41 55
Savings Plan - retirement account 11 12 8
Mirror Savings Plan 4 3 2
Total 67 56 65
Benefits Mirror Plan [Member]
     
Defined Benefit Plan, Accumulated Other Comprehensive Income, Net Gains (Losses), Before Tax $ 21