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Net Fair Value of Commodity Price Risk (Detail) (USD $)
In Millions, unless otherwise specified
Oct. 05, 2013
Derivatives, Fair Value [Line Items]  
Assets $ 0.1
Liabilities (4.5)
Net Fair Value (4.4)
Other Long Term Assets
  
Derivatives, Fair Value [Line Items]  
Assets 0.1
Other Current Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities (3.5)
Other LongTerm Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities (1.0)
Level 1
  
Derivatives, Fair Value [Line Items]  
Assets 0.1
Liabilities (2.9)
Net Fair Value (2.8)
Level 1 | Other Long Term Assets
  
Derivatives, Fair Value [Line Items]  
Assets 0.1
Level 1 | Other Current Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities (2.6)
Level 1 | Other LongTerm Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities (0.3)
Level 2
  
Derivatives, Fair Value [Line Items]  
Liabilities (1.6)
Net Fair Value (1.6)
Level 2 | Other Current Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities (0.9)
Level 2 | Other LongTerm Liabilities
  
Derivatives, Fair Value [Line Items]  
Liabilities $ (0.7)