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Revenue from Contracts with Customers (Tables)
9 Months Ended
Jun. 30, 2020
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 revenues.
June 30,September 30,
20202019
(in millions)
Billed receivables$153.7  $171.0  
Unbilled receivables4.5  4.5  
Total customer receivables$158.2  $175.5  
Deferred revenues$5.4  $4.7