Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			$ 2,370.6		$ 2,370.6
Other comprehensive income (loss) before reclassifications					0.3
Amounts reclassified from accumulated other comprehensive income (loss)					4.7
Other comprehensive income (loss)	$ (10.8)	$ (23.0)			5.0	$ (43.4)
End of period	2,750.5				2,750.5
Cash flow hedge gain (loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			0.6		0.6
Other comprehensive income (loss) before reclassifications					0.1
Amounts reclassified from accumulated other comprehensive income (loss)					(0.6)
Other comprehensive income (loss)					(0.5)
End of period	0.1				0.1
Unrealized gain (loss) on available-for- sale securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			(0.8)		(0.8)
Other comprehensive income (loss) before reclassifications					(0.3)
Amounts reclassified from accumulated other comprehensive income (loss)					0.0
Other comprehensive income (loss)					(0.3)
End of period	(1.1)				(1.1)
Pension and post retirement benefit plan adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			(188.6)		(188.6)
Other comprehensive income (loss) before reclassifications					0.0
Amounts reclassified from accumulated other comprehensive income (loss)					5.3
Other comprehensive income (loss)					5.3
End of period	(183.3)				(183.3)
Cumulative translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period			(156.4)		(156.4)
Other comprehensive income (loss) before reclassifications					0.5
Amounts reclassified from accumulated other comprehensive income (loss)					0.0
Other comprehensive income (loss)					0.5
End of period	(155.9)				(155.9)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(329.4)	(351.2)	(345.2)	$ (330.8)	(345.2)	(330.8)
Other comprehensive income (loss)	(10.8)	(23.0)	15.8	(20.4)
End of period	$ (340.2)	$ (374.2)	$ (329.4)	$ (351.2)	$ (340.2)	$ (374.2)