Acquisitions and Dispositions - Components of Pre-Tax Loss on Sale of Disposal Group (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Pre-tax loss | $ (43.6) | $ 71.6 |
| Disposal Group, Disposed of by Sale, Not Discontinued Operations | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Pre-tax loss | 14.3 | $ 74.3 |
| Disposal Group, Disposed of by Sale, Not Discontinued Operations | Breeze Autocare Stores | ||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||
| Proceeds from sale of operations | 32.1 | |
| Net assets divested | 90.0 | |
| Pre-tax loss | $ (57.9) | |