Debt and Other Financing Arrangements - Debt Maturity Schedule (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
2024	$ 14.0
2025	14.0
2026	432.9
2027	13.5
2028	1,359.9
Thereafter	6.3
Long-Term Debt, Excluding Finance Leases, Gross	1,840.6
Net unamortized (discount) premium	(5.5)	$ (4.3)
Unamortized note issuance costs	(34.6)	$ (38.8)
Total debt	1,800.5
2024	0.2
2025	0.2
2026	0.2
2027	0.1
2028	0.1
Thereafter	0.0
Other Financing Arrangements, Gross	0.8
Other Financing Arrangement, Net unamortized discount	0.0
Other Financing Arrangements, Unamortized note issuance costs	0.0
Other Financing Arrangements, Net	$ 0.8