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Supplemental Financial Information (Cash Flows Information) (Details) - USD ($) $ in Millions | 4 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022
Supplemental Financial Information [Abstract] |  |  |  |
(Increase) decrease in accounts receivable | $ 23.2 | $ (18.3) | $ 44.9 | $ (6.9)
(Increase) decrease in other assets | 15.7 | 9.0 | (5.9) | 0.5
(Decrease) increase in liabilities | 38.2 | 29.3 | 82.8 | (0.2)
Changes in operating assets and liabilities | $ 77.1 | $ 20.0 | $ 121.8 | $ (6.6)

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