Effect of Derivative Instruments Located on the Condensed Consolidated Statements of Income, Utilized for Risk Management Purposes (Detail) - USD ($) $ in Thousands		12 Months Ended
		Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)(Net of tax)		$ (4,195)	$ (3,358)	$ (24,457)
Amount of (Gain) or Loss Reclassified from Accumulated OCI into Income (Effective Portion)(Net of tax)		5,413	3,366	17,141
Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)(Net of tax)				(205)
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)		154	157	502
Commodity Contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivatives (Effective Portion)(Net of tax)		(4,195)	(3,358)	(24,252)
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)	[1]	$ 5,259	$ 3,209	$ 16,639

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