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Supplemental Financial Information (Cash Paid For Interest And Income Taxes) (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] |  |  |  |
Interest, net of amounts capitalized | $ 0.0 | $ 22.8 | $ 32.3 | $ 44.2
Income Taxes Paid, Net | (16.9) | 23.5 | (8.3) | 5.6
Capital expenditure accruals | $ 6.5 | $ 9.3 | $ 71.5 | $ 22.1

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