Equity - Reconciliation of Reclassifications From Accumulated Other Comprehensive Income (Loss), Net of Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Cost of sales	$ 373.2	$ 279.9	$ 659.1	$ 545.9
Total before income taxes	21.9	(12.0)	23.0	(17.9)
Income tax benefit (provision)	(4.0)	(0.7)	(8.2)	(2.6)
Net income (loss)	17.9	(12.7)	14.8	(20.5)
Other income (expense) - net	2.8	(2.9)	0.7	(6.9)
Provision for income taxes	4.0	0.7	8.2	2.6
Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Net income (loss)	(0.3)	(0.3)	(0.9)	(1.1)
Gains and Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Total before income taxes	0.1	(0.2)	0.1	(0.3)
Net income (loss)	0.1	(0.2)	0.1	(0.3)
Gains and Losses on Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Foreign Currency Exchange Contracts
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Cost of sales	0.1	(0.2)	0.1	(0.3)
Actuarial Losses | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Other income (expense) - net	(1.1)	(1.1)	(2.4)	(2.2)
Amortization of Prior Service Cost | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Other income (expense) - net	0.7	0.7	1.4	1.4
Pension & Postretirement | Reclassification out of Accumulated Other Comprehensive Income
Schedule of Reclassifications out of Accumulated Comprehensive Income (Loss) [Line Items]
Total before income taxes	(0.4)	(0.4)	(1.0)	(0.8)
Income tax benefit (provision)		(0.3)
Net income (loss)	$ (0.4)	(0.1)	$ (1.0)	$ (0.8)
Provision for income taxes		$ 0.3