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Revenue from Contracts with Customers (Tables)
3 Months Ended
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Schedule of Accounts, Notes, Loans and Financing Receivable e table below represents the balances of our customer receivables and deferred revenue.
December 31,September 30,
20222022
(in millions)
Billed receivables$203.5 $230.5 
Unbilled receivables4.5 3.1 
  Gross customer receivables208.0 233.6 
Allowance for credit losses(6.1)(5.6)
Receivables, net$201.9 $228.0 
Deferred revenue$8.4 $8.1