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Effect of Derivative Instruments Located on the Condensed Consolidated Statements of Income, Utilized for Risk Management Purposes (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax) $ (24,457) $ (1,546) $ (17,851)
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) 17,141 12,354 (20,962)
Interest Rate Contracts
      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax) (205) (1,221) (547)
Interest Rate Contracts | Interest Expense (Income)
      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) 502 1,732 2,431
Commodity Contract
      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax) (24,252) (325) (17,304)
Commodity Contract | Production Costs
      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax) $ 16,639 [1] $ 10,622 [1] $ (23,393) [1]
[1] Included in Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately).