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Related Party Disclosures (Tables) | 12 Months Ended
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Sep. 30, 2021
Related Party Transactions [Abstract] |
Summary of Transaction Service Agreements | The following table summarizes the TSA income and expenses during the years ended September 30, 2021, 2020 and 2019:
(in millions) |  | 2021 |  | 2020 |  | 2019
TSA income |  | $ | 0.9 |  |  | $ | 9.6 |  |  | $ | 19.1 |
TSA expense |  | 2.6 |  |  | 13.5 |  |  | 13.9 |
Net TSA (loss) income |  | $ | (1.7) |  |  | $ | (3.9) |  |  | $ | 5.2 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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