Real Estate and Other, Net (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 20, 2012
Jul. 28, 2012
Jul. 30, 2011
Real Estate and Other, Net [Abstract]          
Real estate activities $ (210) $ (7)   $ (218) $ (22)
Other 2 1   3 3
Total (income)/expense (208) (6)   (215) (19)
REIT dividend income 2 2   5 4
Joint venture proportional share of earnings 3 4   6 7
Realized Gain on REIT Units $ 202   $ 202    
REIT Units Redeemed 2   2 2