Other Assets and Liabilities - Schedule of Other Accrued and Current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Other Assets And Other Liabilities [Abstract]
Accrued operating costs	$ 112.8	$ 100.3
Accrued interest expense	3.7	4.7
Short-term lease liability	17.0	15.9
Accrued income tax	17.0	50.5
Swap liabilities	91.0	13.2
Other accrued liabilities	17.7	23.4
Total	$ 259.2	$ 208.0