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Income Taxes (Summary Of Components Of Provision For Income Taxes From Continuing Operations) (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
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]        
Current income tax expense, U.S. $ 0.0 $ 5.5 $ 12.4 $ (135.3)
Current income tax expense, Non-U.S. 34.4 52.2 22.8 (18.4)
Current Income Tax Expense, Total 34.4 57.7 35.2 (153.7)
Deferred income tax expense (benefit), U.S. 0.0 (6.6) 8.5 (92.9)
Deferred income tax expense (benefit), Non-U.S. (18.2) (14.7) (0.6) (12.8)
Deferred income tax expense (18.2) (21.3) 7.9 (105.7)
Total provision for income taxes $ 16.2 $ 36.4 $ 43.1 $ (259.4)