Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 16, 2016	Jul. 18, 2015	Jul. 16, 2016	Jul. 18, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes		$ 78,425	$ 79,181	$ 170,803	$ 174,137
Tax benefit		(27,270)	(27,421)	(60,285)	(60,988)
Net income		51,155	51,760	110,518	113,149
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax	[1]	(4,320)	(1,808)	(6,516)	(4,138)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	[1]	(803)	(1,251)	(1,946)	(2,838)
Gains/Losses on Cash Flow Hedges
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax				(1,946)	(2,838)
Gains/Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	[1]	(1,305)	(2,034)	(3,165)	(4,616)
Tax benefit	[1]	502	783	1,219	1,778
Net income	[1]	(803)	(1,251)	(1,946)	(2,838)
Amortization of defined benefit pension items, prior service (cost) credits
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1],[2]	(27)	108	(81)	252
Amortization of defined benefit pension items, Settlement losses
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1],[2]	(4,641)		(4,641)
Amortization of defined benefit pension items, actuarial losses
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1],[2]	(1,050)	(1,014)	(2,708)	(2,366)
Accumulated Defined Benefit Plans Adjustment
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	(5,718)	(906)	(7,430)	(2,114)
Tax benefit	[1]	2,201	349	2,860	814
Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax	[1]	(3,517)	(557)	(4,570)	(1,300)
Interest Rate Contracts | Gains/Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense	[1]	(57)	(57)	(135)	(135)
Commodity Contract | Gains/Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	[1],[3]	$ (1,248)	$ (1,977)	$ (3,030)	$ (4,481)

[1] Amounts in parentheses indicate debits to determine net income.

[2] These items are included in the computation of net periodic pension cost. See Note 14, Post-retirement Plans, for additional information.

[3] Amounts are presented as an adjustment to reconcile net income to net cash provided by operating activities on the Condensed Consolidated Statements of Cash Flows.