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Receivables - Schedule of Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Allowance at beginning of period | $ 13.0 | $ 11.2 | $ 11.3 | $ 9.9
Provision for doubtful accounts, net of recoveries | (1.6) | 0.4 | 0.7 | 1.8
Charge-off of accounts | (0.3) | (0.1) | (0.9) | (0.2)
Allowance at end of period | 11.1 | 11.5 | 11.1 | 11.5
Finance |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Allowance at beginning of period | 3.1 | 2.4 | 2.2 | 2.8
Provision for doubtful accounts, net of recoveries | 0.1 | (0.1) | 1.0 | (0.5)
Allowance at end of period | 3.2 | 2.3 | 3.2 | 2.3
Trade and Other |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Allowance at beginning of period | 9.9 | 8.8 | 8.7 | 7.1
Provision for doubtful accounts, net of recoveries | (1.7) | 0.5 | (0.3) | 2.3
Charge-off of accounts | (0.3) | (0.1) | (0.5) | (0.2)
Allowance at end of period | $ 7.9 | $ 9.2 | 7.9 | $ 9.2
Notes |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Allowance at beginning of period |  |  | 0.4 |
Charge-off of accounts |  |  | $ (0.4) |

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