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Receivables (Tables)
12 Months Ended
Sep. 30, 2020
Receivables [Abstract]  
Schedule of Allowance for Doubtful Accounts The following is a rollforward of the allowance for doubtful accounts for the years ended 2020, 2019 and 2018:
(in millions)
Beginning
Balance
Charged to
Profit & Loss
Deductions
Other
Adjustments
Ending
Balance
September 30, 2020$4.9 $2.3 $(0.7)$(0.1)$6.4 
September 30, 20194.0 2.7 (2.2)0.4 4.9 
September 30, 20186.1 2.9 (3.5)(1.5)4.0