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Allowance for Doubtful Accounts (Tables) | 3 Months Ended
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Dec. 31, 2020
Receivables [Abstract] |
Financing Receivable, Allowance for Credit Loss | Activity in the allowance for doubtful accounts for the three months ended December 31, 2020 was as follows:
(in millions) | 2021
Balance as of September 30, 2020 | $ | 27.1 |
ASU 2016-13 cumulative transition adjustment | 8.2 |
Adjusted balance as of September 30, 2020 | 35.3 |
Provision for bad debts | 1.5 |
Allowance charge-offs | — |
Balance as of December 31, 2020 | $ | 36.8 |

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- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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