Accumulated Other Comprehensive (Loss) Income - Reclassifications Out of Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	$ (539,200,000)	$ (470,200,000)	$ (1,047,700,000)	$ (889,100,000)
Total before taxes			6,600,000	(5,200,000)
Income tax expense (benefit)	1,100,000	(2,500,000)	10,500,000	(2,000,000)
Net income (loss)	18,300,000	(4,500,000)	17,100,000	(7,200,000)
Gains and Losses on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	0	(100,000)	(200,000)	(200,000)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(400,000)	(100,000)	(300,000)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member] | Gains and Losses on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	(100,000)	100,000	200,000	200,000
Total before taxes	(100,000)	100,000	200,000	200,000
Income tax expense (benefit)	100,000
Net income (loss)		100,000	200,000	200,000
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member] | Pension Benefit Plan Items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service costs	(400,000)	(200,000)	(500,000)	(200,000)
Total before taxes	(400,000)	(200,000)	(500,000)	(200,000)
Net income (loss)	$ (400,000)	$ (200,000)	$ (500,000)	$ (200,000)