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v3.23.3

Allowance for Doubtful Accounts - Allowance for Bad Debts (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance, beginning of year | $ 47.8 | $ 39.8 | $ 27.1 |
Provision for bad debts | 12.5 | 12.4 | 10.4 |
Allowance charge-offs | (0.5) | (5.6) | (5.9) |
Other | 0.1 | 1.2 | 0.0 |
Balance, end of year | 59.9 | 47.8 | 39.8 | $ 27.1
Bad debt expense not included in allowance | 4.0 |  |  |
Accounting Standards Update [Extensible Enumeration] |  |  |  | Accounting Standards Update 2016-13 [Member]
Cumulative transition adjustment |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance, beginning of year | 0.0 | 0.0 | 8.2 |
Balance, end of year |  | 0.0 | 0.0 | $ 8.2
Adjusted balance |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Balance, beginning of year | $ 47.8 | 39.8 | 35.3 |
Balance, end of year |  | $ 47.8 | $ 39.8 | $ 35.3

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- Definition SEC Schedule, 12-09, Valuation Allowances and Reserves, Credit Loss Expense (Reversal) Not Included in Allowance + References No definition available. + Details
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