Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period		$ 2,889.3			$ 2,889.3
Other comprehensive income (loss) before reclassifications					(30.7)
Amounts reclassified from accumulated other comprehensive income (loss)					4.1
Current period other comprehensive income (loss)	$ (17.3)		$ 6.5		(26.6)	$ 15.8
End of period	3,066.3				3,066.3
Cash flow hedge gain (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period		(0.3)			(0.3)
Other comprehensive income (loss) before reclassifications					0.6
Amounts reclassified from accumulated other comprehensive income (loss)					(0.1)
Current period other comprehensive income (loss)					0.5
End of period	0.2				0.2
Unrealized gain (loss) on available-for- sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period		(0.2)			(0.2)
Other comprehensive income (loss) before reclassifications					(0.4)
Amounts reclassified from accumulated other comprehensive income (loss)					0.0
Current period other comprehensive income (loss)					(0.4)
End of period	(0.6)				(0.6)
Pension and post retirement benefit plan adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period		(178.4)			(178.4)
Other comprehensive income (loss) before reclassifications					0.0
Amounts reclassified from accumulated other comprehensive income (loss)					4.2
Current period other comprehensive income (loss)					4.2
End of period	(174.2)				(174.2)
Cumulative translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period		(133.5)			(133.5)
Other comprehensive income (loss) before reclassifications					(30.9)
Amounts reclassified from accumulated other comprehensive income (loss)					0.0
Current period other comprehensive income (loss)					(30.9)
End of period	(164.4)				(164.4)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(321.7)	(312.4)	(335.9)	$ (345.2)	(312.4)	(345.2)
Current period other comprehensive income (loss)	(17.3)	(9.3)	6.5	9.3
End of period	$ (339.0)	$ (321.7)	$ (329.4)	$ (335.9)	$ (339.0)	$ (329.4)