Accumulated Other Comprehensive (Loss) Income - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ (202.1)	$ (184.0)	$ (403.0)	$ (368.6)
Total before taxes	(133.1)	4.9	(163.8)	(19.2)
Tax expense or (benefit)	1.4	(2.2)	4.7	(0.8)
Net of tax	(136.0)	4.4	(132.5)	(15.3)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	0.0	(1.7)	2.5	(4.3)
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	0.0	(1.7)	0.1	(4.3)
Gain on sale of discontinued operations	0.0	0.0	2.4	0.0
Total before taxes	0.0	(1.7)	2.5	(4.3)
Tax expense or (benefit)	0.0	0.0	0.0	0.0
Net of tax	0.0	(1.7)	2.5	(4.3)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income | Recognized net actuarial (losses) gains
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Actuarial (losses)/gains	0.0	0.0	0.0	0.0
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	0.0
Tax expense or (benefit)	0.0	0.0		0.0
Net of tax	$ 0.0	$ 0.0	0.0	$ 0.0
Tax impact			$ (1.3)