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Receivables - Schedule of Allowance for Doubtful Accounts (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2022
Sep. 30, 2021
Accounts Notes And Loans Receivable [Line Items]      
Allowance for doubtful accounts at beginning of period $ 3.6 $ 4.2 $ 9.6
Provision for doubtful accounts, net of recoveries 0.6 3.0 (5.5)
Charge-off of accounts   (0.5) (0.5)
Allowance for doubtful accounts at end of period 4.2 6.7 3.6
Finance Receivables      
Accounts Notes And Loans Receivable [Line Items]      
Allowance for doubtful accounts at beginning of period 0.6 0.5 2.7
Provision for doubtful accounts, net of recoveries (0.1) (0.3) 2.1
Charge-off of accounts   (0.1)  
Allowance for doubtful accounts at end of period 0.5 0.1 0.6
Trade and Other Receivables      
Accounts Notes And Loans Receivable [Line Items]      
Allowance for doubtful accounts at beginning of period 3.0 3.7 6.9
Provision for doubtful accounts, net of recoveries 0.7 (3.3) (3.4)
Charge-off of accounts   (0.4) (0.5)
Allowance for doubtful accounts at end of period $ 3.7 $ 6.6 $ 3.0