Investments in and Advances to Unconsolidated Affiliates - Affiliate Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Assets
Current assets	$ 377.5	$ 344.5
Other assets, net	34.0	27.0
Total assets	6,273.5	6,206.8
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities	694.4	621.6
Other liabilities	138.4	122.4
Members' deficit	700.4	552.4
Total liabilities and shareholders' equity	6,273.5	6,206.8
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Assets
Current assets	103.2	91.0
Property and equipment, net	343.9	345.7
Other assets, net	264.4	265.0
Total assets	711.5	701.7
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities	121.8	97.9
Long-term debt	838.0	838.6
Other liabilities	0.2	0.2
Members' deficit	(248.5)	(235.0)
Total liabilities and shareholders' equity	$ 711.5	$ 701.7