Fair Value Disclosures (REIT Assets Measured on Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
May 04, 2013
Feb. 02, 2013
Apr. 28, 2012
Cost basis of REITs $ 7 $ 7 $ 80
Fair Value, Inputs, Level 1 [Member]
     
REIT assets 37 33 379
Fair Value, Inputs, Level 2 [Member]
     
REIT assets         
Fair Value, Inputs, Level 3 [Member]
     
REIT assets