Acquisitions and Dispositions - Dispositions (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Gain on sale of operations | $ 71.6 | $ 0.0 |
| Disposal Group, Disposed of by Sale, Not Discontinued Operations | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Gain on sale of operations | $ 74.3 | |