Accumulated Other Comprehensive Income (Loss) - Reclassifications (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassifications out of AOCI [Line Items]
Other income (expense)- net	$ 13.9	$ 14.9	$ (11.6)
Interest expense	193.2	206.4	271.1
Tax benefit (expense)	28.8	(23.4)	112.4
Net income (loss)	4.1	(65.9)	(111.6)
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Interest expense	(13.2)	3.9	2.8
Total before tax	(13.0)	5.8	2.4
Tax benefit (expense)	3.4	(1.5)	(0.6)
Net income (loss)	(9.6)	4.3	1.8
Amortization of prior service costs | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Other income (expense)- net	0.1	(0.4)	(0.4)
Amortization of actuarial gain/loss | Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of AOCI [Line Items]
Other income (expense)- net	$ 0.1	$ 2.3	$ 0.0