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Net Fair Value of Interest Rate Swaps (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 29, 2012
Derivatives, Fair Value [Line Items]  
Liabilities $ (0.9)
Net Fair Value (0.9)
Other Current Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities (0.9)
Level 1
  
Derivatives, Fair Value [Line Items]  
Liabilities   
Net Fair Value   
Level 1 | Other Current Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities   
Level 2
  
Derivatives, Fair Value [Line Items]  
Liabilities (0.9)
Net Fair Value (0.9)
Level 2 | Other Current Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities (0.9)
Level 3
  
Derivatives, Fair Value [Line Items]  
Liabilities   
Net Fair Value   
Level 3 | Other Current Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities