Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements and Concentrations of Credit Risk (Narrative) (Details)

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Fair Value Measurements and Concentrations of Credit Risk (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]      
Carrying value of long-lived assets held and used $ 27 $ 36  
Long-lived assets held and used 5 18  
Impairments of properties held and used $ 22 $ 18 $ 115