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Allowance for Doubtful Accounts (Tables)
6 Months Ended
Mar. 31, 2023
Receivables [Abstract]  
Schedule of Financing Receivable, Allowance for Credit Loss
Activity in the allowance for doubtful accounts for the six months ended March 31, 2023 was as follows:
(in millions)
Balance as of September 30, 2022$47.8 
Provision for bad debts1.3 
Allowance charge-offs(0.3)
Balance as of March 31, 2023$48.8