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Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Sep. 30, 2023
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]      
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax $ (27.9)   $ (28.5)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax 0.6    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax (6.9)   (20.2)
Foreign currency translation 13.3 $ 4.0  
Accumulated other comprehensive income (loss) (34.8)   $ (48.7)
Other comprehensive income (loss), net of tax 13.9    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax 13.3    
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax 0.0    
Minimum pension liability 0.8    
Other comprehensive income (loss), pension income tax effects $ (0.2) $ (0.3)