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Receivables - Schedule of Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items] |  |
Allowance at beginning of period | $ 11.3 | $ 9.9
Provision for doubtful accounts, net of recoveries | (1.6) | 0.6
Allowance at end of period | 9.7 | 10.5
Finance Receivable |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Allowance at beginning of period | 2.2 | 2.8
Provision for doubtful accounts, net of recoveries | (0.2) | (0.1)
Allowance at end of period | 2.0 | 2.7
Notes Receivable |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Allowance at beginning of period | 0.4 |
Allowance at end of period | 0.4 |
Trade and Other Receivable |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Allowance at beginning of period | 8.7 | 7.1
Provision for doubtful accounts, net of recoveries | (1.4) | 0.7
Allowance at end of period | $ 7.3 | $ 7.8

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