Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 2,683.1	$ 2,682.3	$ 2,680.6	$ 2,881.0	$ 2,682.3	$ 2,881.0
Other comprehensive income (loss) before reclassifications					169.3	(74.5)
Amounts reclassified out from accumulated other comprehensive income (loss)					0.1	1.4
Other comprehensive income (loss), net of tax	116.8	52.6	(24.6)	(48.5)	169.4	(73.1)
Ending balance	2,929.1	2,683.1	2,576.8	2,680.6	2,929.1	2,576.8
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(205.5)	(258.1)	(192.3)	(143.8)	(258.1)	(143.8)
Other comprehensive income (loss), net of tax	116.8	52.6	(24.6)	(48.5)
Ending balance	(88.7)	(205.5)	(216.9)	(192.3)	(88.7)	(216.9)
Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(2.5)		0.0	(2.5)	0.0
Other comprehensive income (loss) before reclassifications					4.7	(6.3)
Amounts reclassified out from accumulated other comprehensive income (loss)					0.3	1.8
Other comprehensive income (loss), net of tax					5.0	(4.5)
Ending balance	2.5		(4.5)		2.5	(4.5)
Change in equity affiliate investment AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		2.5		2.3	2.5	2.3
Other comprehensive income (loss) before reclassifications					0.2	(0.2)
Amounts reclassified out from accumulated other comprehensive income (loss)					0.0	0.0
Other comprehensive income (loss), net of tax					0.2	(0.2)
Ending balance	2.7		2.1		2.7	2.1
Defined benefit pension and other postretirement plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(9.8)		(10.1)	(9.8)	(10.1)
Other comprehensive income (loss) before reclassifications					(0.9)	0.0
Amounts reclassified out from accumulated other comprehensive income (loss)					(0.2)	(0.4)
Other comprehensive income (loss), net of tax					(1.1)	(0.4)
Ending balance	(10.9)		(10.5)		(10.9)	(10.5)
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ (248.3)		$ (136.0)	(248.3)	(136.0)
Other comprehensive income (loss) before reclassifications					165.3	(68.0)
Amounts reclassified out from accumulated other comprehensive income (loss)					0.0	0.0
Other comprehensive income (loss), net of tax					165.3	(68.0)
Ending balance	$ (83.0)		$ (204.0)		$ (83.0)	$ (204.0)