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Supplemental Financial Information (Narrative) (Details) - USD ($) $ in Millions | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2020
Supplemental Financial Information [Abstract] |  |  |  |
Restricted Cash | $ 88.4 | $ 35.9 | $ 24.4 | $ 11.4
Deposit Liabilities, Collateral Issued, Financial Instruments |  | 31.1 | 20.7 | 5.8
Interest Costs Capitalized |  |  | 1.2 | 1.3
Capital expenditure accruals | $ 6.5 | $ 9.3 | $ 22.1 | $ 5.4

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