Accumulated Other Comprehensive Income (Loss) - Schedule of Reclassifications out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	$ (1.7)	$ (1.4)	$ (3.0)	$ (1.5)
Interest expense	50.3	59.0	103.2	144.3
Tax benefit (expense)	(1.2)	(2.9)	(0.8)	(47.1)
Net income (loss)	32.6	15.7	47.4	37.6
Amount reclassified from accumulated other comprehensive income (loss)
Reclassifications out of AOCI [Line Items]
Total before tax	(5.5)	(10.4)	(8.6)	(32.0)
Tax benefit (expense)	(5.0)	2.9	(4.3)	8.2
Net income (loss)	(10.5)	(7.5)	(12.9)	(23.8)
Amortization of prior service costs | Amount reclassified from accumulated other comprehensive income (loss)
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	(0.1)	(0.2)	(0.2)	(0.3)
Amortization of actuarial gain/loss | Amount reclassified from accumulated other comprehensive income (loss)
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	(0.3)	(0.3)	(0.6)	(0.6)
Cash flow hedge derivative | Amount reclassified from accumulated other comprehensive income (loss) | Interest Rate Swap
Reclassifications out of AOCI [Line Items]
Interest expense	$ (5.1)	$ (9.9)	$ (7.8)	$ (31.1)