Fair Value Disclosures (Other Non-Financial Assets) (Details) (USD $)
Jul. 30, 2011
Jan. 29, 2011
Fair Value Disclosures    
Carrying value of long-term debt $ 3,100,000,000 $ 3,100,000,000
Fair value of long-term debt $ 3,100,000,000 $ 3,100,000,000