Derivative Instruments Located on Consolidated Statements of Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011		Jan. 01, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax)	$ (1,546)		$ (17,851)		$ 27,700
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax)	12,354		(20,962)		8,069
Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax)	(1,221)		(547)		(2,684)
Interest Rate Contracts | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax)	1,732		2,431		2,857
Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivative (Effective Portion)(Net of tax)	(325)		(17,304)		30,384
Commodity Contract | Selling, General and Administrative Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax)
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)	$ 10,622	[1]	$ (23,393)	[1]	$ 5,212	[1]

[1] Included in Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately).