Fair Value Measurements and Concentrations of Credit Risk (Company Non-Financial Assets Measured On A Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified |
Jan. 28, 2012
|
Jan. 29, 2011
|
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Long-lived assets held and used | $ 5 | $ 18 |
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
|
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Long-lived assets held and used | 0 | 0 |
Significant Observable Inputs (Level 2) [Member]
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Long-lived assets held and used | 0 | 0 |
Significant Unobservable Inputs (Level 3) [Member]
|
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Long-lived assets held and used | $ 5 | $ 18 |