Investments in and Advances to Unconsolidated Affiliates - Affiliate Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Assets
Current assets	$ 464.0	$ 412.3
Other assets, net	19.3	18.3
Total assets	7,375.7	7,275.9
Liabilities and Members' Deficit
Current liabilities	772.1	729.3
Other liabilities	142.7	146.5
Members' deficit	1,042.6	1,084.6
Total liabilities and shareholders' equity	7,375.7	7,275.9
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Assets
Current assets	100.1	100.5
Property and equipment, net	321.8	325.6
Other assets, net	265.3	267.5
Total assets	687.2	693.6
Liabilities and Members' Deficit
Current liabilities	107.6	89.9
Long-term debt	805.7	839.8
Other liabilities	0.8	1.7
Members' deficit	(226.9)	(237.8)
Total liabilities and shareholders' equity	$ 687.2	$ 693.6