Investment in and Advances to Unconsolidated Affiliates - Balance Sheet of Equity Method Investments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Assets
Current assets	$ 400.8	$ 344.5
Property and equipment, net	2,561.2	1,978.3
Other assets, net	19.3	27.0
Total assets	6,955.5	6,206.8
Liabilities and Members' Deficit
Current liabilities	755.8	621.6
Other liabilities	137.8	122.4
Members' deficit	894.5	552.4
Total liabilities and shareholders' equity	6,955.5	6,206.8
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Assets
Current assets	104.8	91.0
Property and equipment, net	339.4	345.7
Other assets, net	266.1	265.0
Total assets	710.3	701.7
Liabilities and Members' Deficit
Current liabilities	106.2	97.9
Long-term debt	847.2	838.6
Other liabilities	0.7	0.2
Members' deficit	(243.8)	(235.0)
Total liabilities and shareholders' equity	$ 710.3	$ 701.7