Accumulated Other Comprehensive (Loss) Income - Reclassifications Out of Accumulated Other Comprehensive (Loss) Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Jan. 03, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	$ (508.5)	$ (418.9)
Total before taxes	(10.6)	(3.2)
Income tax expense (benefit)	9.4	0.5
Net loss	(1.2)	(2.7)
Gains and Losses on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	(0.2)		(0.1)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net loss	0.1	0.1
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	0.3	0.1
Total before taxes	0.3	0.1
Income tax expense (benefit)	(0.1)
Net loss	0.2	0.1
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	(0.1)
Total before taxes	(0.1)
Net loss	$ (0.1)