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Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Sep. 30, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]      
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax $ (26.5)    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax (6.3)    
Accumulated Other Comprehensive Income (Loss), Net of Tax (33.6)   $ (32.8)
Minimum pension liability, net of tax 0.4    
Foreign currency translation (1.2) $ 0.1  
Other Comprehensive Income (Loss), Net of Tax (0.8)    
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax (26.1)    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax (7.5)    
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (33.6)