Investment In and Advances to Unconsolidated Affiliates - Balance Sheet of Equity Method Investments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets
Current assets	$ 501.5	$ 235.1
Property and equipment, net	994.9	1,082.1
Other assets, net	18.9	21.2
Total assets	2,981.6	2,686.4
Liabilities and Members' Deficit
Current liabilities	395.0	424.2
Long-term debt	1,968.0	1,622.3
Other liabilities	52.6	45.8
Members' deficit	307.7	349.8
Total liabilities and shareholders' equity	2,981.6	2,686.4
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Assets
Current assets	96.0	132.8
Property and equipment, net	312.3	267.5
Other assets, net	264.1	244.9
Total assets	672.4	645.2
Liabilities and Members' Deficit
Current liabilities	95.3	133.5
Long-term debt	786.9	753.5
Other liabilities	20.6	42.3
Members' deficit	(230.4)	(284.1)
Total liabilities and shareholders' equity	$ 672.4	$ 645.2