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Allowance for Doubtful Accounts (Tables) | 12 Months Ended
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Sep. 30, 2022
Receivables [Abstract] |
Schedule of Allowance for Doubtful Accounts | Activity in the allowance for doubtful accounts for the years ended September 30, 2022, 2021, and 2020 was as follows:
(in millions) | 2022 |  | 2021 |  | 2020
Balance, beginning of year | $ | 39.8 |  |  | $ | 27.1 |  |  | $ | 48.6 |
ASU 2016-13 cumulative transition adjustment | — |  |  | 8.2 |  |  | — |
Adjusted balance, beginning of year | 39.8 |  |  | 35.3 |  |  | 48.6 |
Provision for bad debts(2) | 12.4 |  |  | 10.4 |  |  | 13.0 |
Allowance charge-offs | (5.6) |  |  | (5.9) |  |  | (35.6) |
Other(1) | 1.2 |  |  | — |  |  | 1.1 |
Balance, end of year | $ | 47.8 |  |  | $ | 39.8 |  |  | $ | 27.1 |
(1) Allowance increase is related to a recoverable amount due from an affiliated party and recorded in Other assets on the Consolidated Balance Sheets.
(2) An additional $3.4 million is included in bad debt expense for the year ended September 30, 2022 on the consolidated income statement, which is not included in the allowance at the year then ended.

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