XML 22 R31.htm IDEA: XBRL DOCUMENT v2.4.0.6
Related party transactions (Details) (USD $)
9 Months Ended
Oct. 28, 2011
Oct. 29, 2010
Related party transactions    
Notional amount of interest rate swap $ 686,700,000  
Affiliates of KKR and Goldman, Sachs & Co., who may be lenders | Term Loan Facility
   
Related party transactions    
Principal balance of term loan facility 1,960,000,000  
Interest paid on the Term Loan Facility 46,400,000 45,500,000
Goldman, Sachs & Co.
   
Related party transactions    
Notional amount of interest rate swap 143,300,000  
Interest rate swap payment $ 10,600,000 $ 12,900,000