v2.3.0.15
Fair Value Measurements (Details 2) (Fair value measured on nonrecurring basis, USD $)
In Millions
3 Months Ended9 Months Ended
Oct. 29, 2011
Oct. 30, 2010
Oct. 29, 2011
Oct. 30, 2010
Carrying amount | Long-lived assets held for sale
    
Financial assets and liabilities measured at fair value on a recurring basis    
Other current assets$ 6 $ 17$ 2
Carrying amount | Long-lived assets held and used
    
Financial assets and liabilities measured at fair value on a recurring basis    
Property and equipment7259773
Fair value measurement | Long-lived assets held for sale
    
Financial assets and liabilities measured at fair value on a recurring basis    
Other current assets5 152
Fair value measurement | Long-lived assets held and used
    
Financial assets and liabilities measured at fair value on a recurring basis    
Property and equipment6236463
Gain/(loss) | Long-lived assets held for sale
    
Financial assets and liabilities measured at fair value on a recurring basis    
Other current assets(1) (2) 
Gain/(loss) | Long-lived assets held and used
    
Financial assets and liabilities measured at fair value on a recurring basis    
Property and equipment$ (1)$ (2)$ (33)$ (10)