Accumulated Other Comprehensive Loss - Reclassifications (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	$ 5,372.9	$ 4,947.9	$ 4,194.1
Cost of goods sold	3,484.8	3,476.3	3,042.6
Tax (expense) benefit	(217.3)	(140.2)	(88.2)
Gain on disposition of business (Note 2)	0.0	0.0	(6.9)
Gain (loss) net of tax	766.0	551.4	$ 405.6
Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss) net of tax	(7.1)	(14.3)
Cash flow hedges gain (loss) | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	0.0	0.0
Cost of goods sold	0.9	1.2
Total before tax	0.9	1.2
Tax (expense) benefit	(0.3)	(0.2)
Gain (loss) net of tax	0.6	1.0
Amortization of defined benefit pension and post retirement benefit items | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(10.2)	(19.8)
Tax (expense) benefit	2.5	5.0
Gain (loss) net of tax	(7.7)	(14.8)
Prior-service credits | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(0.4)	(0.4)
Actuarial gains/(losses) | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(9.8)	(10.6)
Settlement and curtailment losses | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	0.0	(8.8)
Cumulative Translation Adjustment | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax (expense) benefit	0.0	0.0
Gain on disposition of business (Note 2)	0.0	(0.5)
Gain (loss) net of tax	$ 0.0	$ (0.5)