Accumulated Other Comprehensive Loss ("AOCL") - Components of AOCL (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive loss before income tax effect	$ (50.8)		$ (57.5)
Defined benefit plan liabilities	2.3		2.3
Accumulated other comprehensive loss	(48.5)		(55.2)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	929.9	$ 805.3
Other comprehensive loss before reclassifications	4.8	0.0
Net amount reclassified to net income (loss)	1.9	1.7
Ending balance	1,284.5	837.8
Defined benefit plan liabilities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive loss before income tax effect	(51.9)		(58.7)
Defined benefit plan liabilities	2.6		2.6
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(56.4)	(104.6)
Other comprehensive loss before reclassifications	4.8	0.0
Net amount reclassified to net income (loss)	1.9	1.7
Ending balance	(49.7)	(102.9)
Unrealized gain on financial instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive loss before income tax effect	1.1		1.2
Defined benefit plan liabilities	(0.3)		$ (0.3)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1.2	1.3
Other comprehensive loss before reclassifications	0.0	0.0
Net amount reclassified to net income (loss)	0.0	0.0
Ending balance	1.2	1.3
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(55.2)	(103.3)
Ending balance	$ (48.5)	$ (101.6)