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Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Sep. 30, 2022
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]          
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax $ (34.3)   $ (34.3)   $ (36.3)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax     2.0    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax (11.3)   (11.3)   (8.3)
Foreign currency translation (4.9) $ (17.6) (3.0) $ (15.5)  
Accumulated other comprehensive income (loss) (45.6)   (45.6)   $ (44.6)
Other comprehensive income (loss), net of tax     (1.0)    
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax     (3.0)    
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax     0.0    
Minimum pension liability     2.8    
Other comprehensive income (loss), pension income tax effects $ (0.2) $ 0.2 $ (0.8) $ 0.3