Accumulated Other Comprehensive (Loss) Income - Reclassifications (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ (289.9)	$ (298.8)	$ (872.1)	$ (888.3)
Total before taxes	17.6	9.5	4.8	29.3
Tax expense or (benefit)	(9.0)	(1.0)	(11.5)	(4.0)
Net of tax	10.1	10.0	(5.2)	382.8
Reclassification Out of Accumulated Other Comprehensive (Loss) Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	(2.1)	(2.4)	(6.4)	(30.1)
Gain on sale of discontinued operations	0.0	0.0	0.0	(9.4)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Gains and losses on derivative instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	2.1	2.4	6.4	3.8
Total before taxes	(2.1)	(2.4)	(6.4)	(3.8)
Tax expense or (benefit)	0.0	0.0	0.0	0.0
Net of tax	(2.1)	(2.4)	(6.4)	(3.8)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Recognized net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on sale of discontinued operations	0.0	0.0	0.0	(16.9)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Prior service costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	0.0	0.0	0.0	0.0
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Amortization of pension benefit plan items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before taxes	0.0	0.0	0.0	(16.9)
Tax expense or (benefit)	0.0	0.0	0.0	0.0
Net of tax	$ 0.0	$ 0.0	$ 0.0	(16.9)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax impact				$ 3.6