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Equity Method Investment In ARO - Summarized Financial Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Investment Owned, Balance [Abstract]
Equity in earnings (losses) of ARO	$ 4.4	$ (23.8)	$ 5.9	$ (21.7)
Loss on impairment	0.0	0.0	7.8	0.0
Loss on impairment	0.0	0.0	7.8	0.0
ARO
Investment Owned, Balance [Abstract]
Income (Loss) From Equity Method Investments, Ownership Interest	1.2	(27.0)	(3.6)	(31.2)
Amortization of basis differences	3.2	3.2	9.5	9.5
Equity in earnings (losses) of ARO	$ 4.4	(23.8)	$ 5.9	(21.7)
ARO
Investment Owned, Balance [Abstract]
Loss on impairment		28.4		28.4
Loss on impairment		$ 28.4		$ 28.4

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