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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, 2020
Dec. 31, 2019
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]        
Current income tax expense, U.S. $ 0.0 $ 5.5 $ (135.3) $ 31.3
Current income tax expense, Non-U.S. 34.4 53.2 (18.4) 73.2
Current Income Tax Expense, Total 34.4 58.7 (153.7) 104.5
Deferred income tax expense (benefit), U.S. 0.0 (6.6) (92.9) 19.7
Deferred income tax expense (benefit), Non-U.S. (18.2) (14.7) (12.8) 4.2
Deferred income tax expense (18.2) (21.3) (105.7) 23.9
Total provision for income taxes $ 16.2 $ 37.4 $ (259.4) $ 128.4