Investments in and Advances to Unconsolidated Affiliates - Affiliate Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Assets
Current assets	$ 452.4	$ 412.3
Other assets, net	17.8	18.3
Total assets	7,347.1	7,275.9
Liabilities and Members' Deficit
Current liabilities	846.1	729.3
Other liabilities	141.2	146.5
Members' deficit	1,072.7	1,084.6
Total liabilities and shareholders' equity	7,347.1	7,275.9
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Assets
Current assets	103.5	100.5
Property and equipment, net	324.4	325.6
Other assets, net	270.2	267.5
Total assets	698.1	693.6
Liabilities and Members' Deficit
Current liabilities	116.4	89.9
Long-term debt	816.5	839.8
Other liabilities	0.4	1.7
Members' deficit	(235.2)	(237.8)
Total liabilities and shareholders' equity	$ 698.1	$ 693.6