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Revenue from Contracts with Customers (Tables)
3 Months Ended
Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]  
Schedule of Accounts, Notes, Loans and Financing Receivable
The table below represents the balances of our customer receivables and deferred revenue:

December 31,September 30,
20232023
(in millions)
Billed receivables$167.5 $218.1 
Unbilled receivables7.9 6.3 
Gross customer receivables175.4 224.4 
Allowance for credit losses(7.5)(7.3)
Receivables, net$167.9 $217.1 
Deferred revenue$8.4 $9.2