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Derivative Financial Instruments (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Aug. 03, 2013
instrument
Aug. 02, 2014
Aug. 03, 2013
instrument
Feb. 01, 2014
Aug. 02, 2014
Interest rate swaps
Aug. 03, 2013
Interest rate swaps
Aug. 02, 2014
Interest rate swaps
Aug. 03, 2013
Interest rate swaps
Jun. 30, 2014
Interest rate swaps
swap
Mar. 31, 2014
Interest rate swaps
Derivative Contracts - Types, Statements of Financial Position Classification and Fair Values                    
Number of derivative instruments designated as accounting hedge 1   1           2  
Derivative, notional amount                 $ 500,000,000 $ 250,000,000
Amount of ineffectiveness recognized 0 0 0              
Derivative Contracts - Effect on Results of Operations                    
Classification of (income)/expense, net interest expense         (9,000,000) (7,000,000) (13,000,000) (15,000,000)    
Unamortized hedged debt valuation gains from terminated and de-designated interest rate swaps $ 63,000,000 $ 43,000,000 $ 63,000,000 $ 52,000,000