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Derivative Instruments (Details) (Interest Rate Cap, USD $)
12 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Feb. 02, 2013
Senior secured term loan
Feb. 02, 2013
Senior secured term loan
Maximum
Derivative Instruments        
Variable interest rate basis     three month LIBOR  
Notional value     $ 2,000,000,000  
Fixed interest rate (as a percent)       7.00%
Gain (Loss) due to change in fair value $ 5,000,000 $ 12,000,000