Equity Method Investment in ARO - Schedule of Related Parties (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Principal amount	$ 228.3	$ 249.1	$ 254.0
Non-cash amortization	0.0	20.8	44.9	$ 0.0
ARO
Schedule of Equity Method Investments [Line Items]
Principal amount		442.7	402.7
Discount		(193.6)	(148.7)
Carrying value		249.1	254.0
Interest income	3.5	7.0	11.3	18.3
Non-cash amortization	0.0	20.8	44.9	0.0
Interest income	$ 3.5	$ 27.8	$ 56.2	$ 18.3