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Allowance for Doubtful Accounts (Tables) | 12 Months Ended
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Sep. 30, 2023
Receivables [Abstract] |
Schedule of Allowance for Doubtful Accounts | Activity in the allowance for doubtful accounts for the years ended September 30, 2023, 2022, and 2021 was as follows:
(in millions) | 2023 |  | 2022 |  | 2021
Balance, beginning of year | $ | 47.8 |  |  | $ | 39.8 |  |  | $ | 27.1 |
ASU 2016-13 cumulative transition adjustment | — |  |  | — |  |  | 8.2 |
Adjusted balance, beginning of year | 47.8 |  |  | 39.8 |  |  | 35.3 |
Provision for bad debts(1) | 12.5 |  |  | 12.4 |  |  | 10.4 |
Allowance charge-offs | (0.5) |  |  | (5.6) |  |  | (5.9) |
Other(2) | 0.1 |  |  | 1.2 |  |  | — |
Balance, end of year | $ | 59.9 |  |  | $ | 47.8 |  |  | $ | 39.8 |
(1) An additional $4.0 million is included in bad debt expense for the year ended September 30, 2023 on the consolidated income statement, which is not included in the allowance at the year then ended.
(2) Allowance increase is related to a recoverable amount due from an affiliated party and recorded in Other assets on the Consolidated Balance Sheets.

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- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
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