Investments in and Advances to Unconsolidated Affiliates - Affiliate Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Assets
Current assets	$ 414.9	$ 412.3
Other assets, net	21.5	18.3
Total assets	7,454.8	7,275.9
Liabilities and Members' Deficit
Current liabilities	725.2	729.3
Other liabilities	98.1	146.5
Members' deficit	1,035.9	1,084.6
Total liabilities and shareholders' equity	7,454.8	7,275.9
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Assets
Current assets	106.9	100.5
Property and equipment, net	319.4	325.6
Other assets, net	265.3	267.5
Total assets	691.6	693.6
Liabilities and Members' Deficit
Current liabilities	114.6	89.9
Long-term debt	794.1	839.8
Other liabilities	0.5	1.7
Members' deficit	(217.6)	(237.8)
Total liabilities and shareholders' equity	$ 691.6	$ 693.6