Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	$ 3,410.6
Other comprehensive (loss) income	71.7	$ (74.1)	$ 32.8
End of period	3,857.9	3,410.6
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(386.5)	(312.4)	(345.2)
Other comprehensive income (loss) before reclassifications	63.5	(81.1)	25.7
Amounts reclassified from accumulated other comprehensive loss	8.2	7.0	7.1
Other comprehensive (loss) income	71.7	(74.1)	32.8
End of period	(314.8)	(386.5)	(312.4)
Cash Flow Hedge (Loss) Gain
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	1.0	(0.3)	0.6
Other comprehensive income (loss) before reclassifications	(0.9)	1.8	(0.3)
Amounts reclassified from accumulated other comprehensive loss	(0.4)	(0.5)	(0.6)
Other comprehensive (loss) income	(1.3)	1.3	(0.9)
End of period	(0.3)	1.0	(0.3)
Unrealized Gain (Loss) on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(0.3)	(0.2)	(0.8)
Other comprehensive income (loss) before reclassifications	0.7	(0.1)	0.6
Amounts reclassified from accumulated other comprehensive loss	0.0	0.0	0.0
Other comprehensive (loss) income	0.7	(0.1)	0.6
End of period	0.4	(0.3)	(0.2)
Pension and Post Retirement Benefit Plan Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(193.4)	(178.4)	(188.6)
Other comprehensive income (loss) before reclassifications	15.0	(22.5)	2.5
Amounts reclassified from accumulated other comprehensive loss	8.6	7.5	7.7
Other comprehensive (loss) income	23.6	(15.0)	10.2
End of period	(169.8)	(193.4)	(178.4)
Cumulative Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(193.8)	(133.5)	(156.4)
Other comprehensive income (loss) before reclassifications	48.7	(60.3)	22.9
Amounts reclassified from accumulated other comprehensive loss	0.0	0.0	0.0
Other comprehensive (loss) income	48.7	(60.3)	22.9
End of period	$ (145.1)	$ (193.8)	$ (133.5)