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Equity Method Investment in ARO - Schedule of Related Parties (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |  |
Amounts receivable (1) | $ 16.9 |  | $ 12.0
Contract liabilities(2) | 8.9 |  | 16.7
Accounts payable(2) | 53.4 |  | 43.2
Carrying value | 261.0 |  | 254.0
Non-cash amortization | 7.0 | $ 7.7 |
ARO |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Principal amount | 402.7 |  | 402.7
Discount | (141.7) |  | (148.7)
Carrying value | 261.0 |  | 254.0
Interest receivable | 7.5 |  | $ 0.0
Interest income | 7.5 | 2.8 |
Non-cash amortization | 7.0 | 7.7 |
Total interest income on the Notes Receivable from ARO | $ 14.5 | $ 10.5 |

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