Other Assets and Liabilities - Schedule of Other Accrued and Current Liabilities (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Other Assets And Other Liabilities [Abstract]
Accrued operating costs	$ 96.0	$ 94.3
Accrued interest expense	4.5	5.3
Short-term lease liability	14.6	15.0
Accrued income tax	4.0	15.3
Other accrued liabilities	45.8	66.2
Total	164.9	$ 196.1
Operating lease liability, current	$ 0.1