Accumulated Other Comprehensive Income (Loss) - Reclassification from OCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax			$ 3.2	$ 3.7
Net sales	$ (989.7)	$ (1,070.2)	(3,200.0)	(3,463.8)
Cost of products sold	(922.4)	(994.0)	(2,985.5)	(3,194.9)
Interest expense	(5.1)	(6.0)	(16.1)	(19.8)
Total	17.4	18.1	48.3	92.3
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Changes in fair value of cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	3.6	(2.4)	0.9	(4.9)
Cost of products sold	0.1	(0.5)	(0.4)	(1.1)
Interest expense	2.8	0.6	6.3	1.4
Total	6.3	(2.3)	8.2	(4.6)
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Changes in fair value of cash flow hedges: | Price Risk Derivative
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold	(0.2)	0.0	1.0	0.0
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Changes in fair value of cash flow hedges: | Not Designated as Hedging Instrument [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of products sold	0.3	0.0	0.3	0.0
Other (expense) income, net	(0.3)	0.0	0.1	0.0
Reclassification out of Accumulated Other Comprehensive Income (Loss) | Amortization of retirement benefits:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other (expense) income, net	0.3	0.1	0.9	0.4
Total	$ 0.3	$ 0.1	$ 0.9	$ 0.4