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Revenue - Receivables (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total customer receivables $ 422.8 $ 431.3
Unbilled receivables 9.4 10.0
Billed receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total customer receivables $ 413.4 $ 421.3