Accumulated Other Comprehensive Loss - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	$ 1,100.1	$ 1,083.4	$ 1,054.3	$ 956.3	$ 917.1	$ 970.3	$ 837.5	$ 957.6	$ 4,194.1	$ 3,682.5	$ 3,946.6
Cost of goods sold	$ 810.2	$ 782.3	$ 756.0	$ 694.1	$ 656.9	$ 677.5	$ 582.3	$ 680.0	3,042.6	2,596.7	2,775.0
Tax (expense) benefit									(88.2)	(89.8)	(101.2)
Gain (loss) net of tax									405.6	355.9	$ 407.4
Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss) net of tax									(8.8)	(12.2)
Cash flow hedges gain (loss) | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales									(0.1)	0.3
Cost of goods sold									(0.9)	0.5
Total before tax									(1.0)	0.8
Tax (expense) benefit									0.3	(0.2)
Gain (loss) net of tax									(0.7)	0.6
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									(10.9)	(17.0)
Tax (expense) benefit									2.8	4.2
Gain (loss) net of tax									(8.1)	(12.8)
Prior-service costs | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									(0.2)	0.2
Actuarial gains/(losses) | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									(10.7)	(9.7)
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	$ (7.5)