Accumulated Other Comprehensive Income (Loss) - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	$ 0.6	$ (9.3)
Interest expense	55.3	47.2
Tax benefit (expense)	11.8	9.3
Net income (loss)	(32.8)	(29.8)
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Interest expense	(14.3)	1.1
Total before tax	(15.0)	1.0
Tax benefit (expense)	3.7	(0.3)
Net income (loss)	(11.3)	0.7
Amortization of prior service costs | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	(0.1)	(0.1)
Amortization of actuarial gain/loss | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	$ (0.6)	$ 0.0