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DIVESTITURES - Schedule of Components of Income from Discontinued Operations, Net of Tax (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income from discontinued operations, net of tax | $ 25.5 | $ 2,035.6 | $ 149.7
Income from discontinued operations, net of tax attributable to noncontrolling interest | 0.0 | 0.3 | 0.9
Income from discontinued operations, net of tax attributable to controlling interest | 25.5 | 2,035.3 | 148.8
Discontinued Operations, Held-for-sale or Disposed of by Sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income from discontinued operations before income taxes | 25.1 | 2,909.3 | 203.1
Income tax (benefit) expense from discontinued operations | (0.4) | 873.7 | 53.4
Income from discontinued operations, net of tax | 25.5 | 2,035.6 | 149.7
Income from discontinued operations, net of tax attributable to noncontrolling interest | 0.0 | 0.3 | 0.9
Income from discontinued operations, net of tax attributable to controlling interest | 25.5 | 2,035.3 | 148.8
Discontinued Operations, Held-for-sale or Disposed of by Sale | HHI Segment |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income from discontinued operations before income taxes | 14.9 | 136.9 | 253.3
Gain on sale of discontinued operations before income taxes | 0.0 | 2,824.2 | 0.0
Discontinued Operations, Held-for-sale or Disposed of by Sale | Other Disposal Group |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income from discontinued operations before income taxes | 10.2 | (2.4) | (3.8)
Discontinued Operations, Held-for-sale or Disposed of by Sale | Corporate Debt |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income from discontinued operations before income taxes | $ 0.0 | $ 49.4 | $ 46.4

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