Supplemental Financial Data - Schedule of Other Income (Expense) — Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Non-operating pension income (expense)	$ 20.0	$ 18.3	$ 42.2
Debt redemption premium	0.0	0.0	(16.3)
Miscellaneous other income (expense) – net	(19.7)	(23.6)	(12.0)
Other income (expense) – net	$ 0.3	$ (5.3)	$ 13.9
6.875% Senior Secured Notes Due 2026 | Secured Debt
Valuation Allowance [Line Items]
Interest rate on debt instrument (as a percent)			6.875%