Fair Value Disclosures (REIT Assets Measured on Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
Feb. 02, 2013
Jan. 28, 2012
Cost basis of REITs $ 7 $ 80
Fair Value, Inputs, Level 1 [Member]
   
REIT assets 33 336
Fair Value, Inputs, Level 2 [Member]
   
REIT assets      
Fair Value, Inputs, Level 3 [Member]
   
REIT assets