Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements and Concentrations of Credit Risk (Estimated Fair Value Of Company Long Term Debt) (Details)

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Fair Value Measurements and Concentrations of Credit Risk (Estimated Fair Value Of Company Long Term Debt) (Details) (USD $)
In Millions, unless otherwise specified
Jan. 28, 2012
Jan. 29, 2011
Notional Amount
   
Long-term debt $ 6,404 $ 6,702
Carrying Amount
   
Long-term debt 6,620 6,941
Fair Value
   
Long-term debt $ 7,343 $ 6,969