Accumulated Other Comprehensive Income (Loss) - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	$ (9.3)	$ 6.8
Interest expense	47.2	48.9
Tax benefit (expense)	9.3	9.8
Net income (loss)	(29.8)	(23.3)
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Interest expense	1.1	0.8
Total before tax	1.0	1.2
Tax benefit (expense)	(0.3)	0.0
Net income (loss)	0.7	1.2
Amortization of prior service costs | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	(0.1)	0.0
Amortization of actuarial gain/loss | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Other income (expense) - net	$ 0.0	$ 0.4