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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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