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Restructuring And Related Charges (Rollforward Of Restructuring Accrual) (Details)
$ in Millions
9 Months Ended
Jun. 30, 2018
USD ($)
Restructuring Cost and Reserve [Line Items]  
Accrual balance at beginning $ 17.0
Provisions 7.0
Cash expenditures (16.0)
Non-cash items
Accrual balance at ending 8.0
Termination Benefits [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at beginning 7.2
Provisions 4.4
Cash expenditures (7.8)
Non-cash items
Accrual balance at ending 3.8
Other Costs [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance at beginning 9.8
Provisions 2.6
Cash expenditures (8.2)
Non-cash items
Accrual balance at ending $ 4.2