Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,682.3	$ 2,881.0
Other comprehensive income (loss) before reclassifications	52.3	(49.5)
Amounts reclassified out from accumulated other comprehensive income (loss)	0.3	1.0
Other comprehensive income (loss), net of tax	52.6	(48.5)
Ending balance	2,683.1	2,680.6
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(258.1)	(143.8)
Other comprehensive income (loss), net of tax	52.6	(48.5)
Ending balance	(205.5)	(192.3)
Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2.5)	0.0
Other comprehensive income (loss) before reclassifications	2.1	(3.1)
Amounts reclassified out from accumulated other comprehensive income (loss)	0.4	1.2
Other comprehensive income (loss), net of tax	2.5	(1.9)
Ending balance	0.0	(1.9)
Change in equity affiliate investment AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2.5	2.3
Other comprehensive income (loss) before reclassifications	0.1	(0.1)
Amounts reclassified out from accumulated other comprehensive income (loss)	0.0	0.0
Other comprehensive income (loss), net of tax	0.1	(0.1)
Ending balance	2.6	2.2
Defined benefit pension and other postretirement plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(9.8)	(10.1)
Other comprehensive income (loss) before reclassifications	(0.3)	0.0
Amounts reclassified out from accumulated other comprehensive income (loss)	(0.1)	(0.2)
Other comprehensive income (loss), net of tax	(0.4)	(0.2)
Ending balance	(10.2)	(10.3)
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(248.3)	(136.0)
Other comprehensive income (loss) before reclassifications	50.4	(46.3)
Amounts reclassified out from accumulated other comprehensive income (loss)	0.0	0.0
Other comprehensive income (loss), net of tax	50.4	(46.3)
Ending balance	$ (197.9)	$ (182.3)