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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
 3 Months Ended 6 Months Ended
Jul. 12, 2014
Jul. 13, 2013
Jul. 12, 2014
Jul. 13, 2013
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) $ (16,166) [1] $ (6,918) [1] $ (816) [1] $ (15,539) [1]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) (406) [1] (6,887) [1] (3,430) [1] (7,894) [1]
Interest Rate Contracts
        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) 35 [1] 29 [1] 83 [1] (267) [1]
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)   (155) [1]   (489) [1]
Commodity Contract
        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion) (16,201) [1] (6,947) [1] (899) [1] (15,272) [1]
Commodity Contract | Production Costs
        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) $ (406) [1],[2] $ (6,732) [1],[2] $ (3,430) [1],[2] $ (7,405) [1],[2]
[1] Amounts in parentheses indicate debits to determine net income.
[2] Included in materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately).