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v3.25.1

Divestitures - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net proceeds from sale of business | $ 16 |  | $ 16 | $ 0
Income (loss) on acquisitions and divestitures | 18 | $ 0 | (165) | $ (2)
Land and Building [Member] | Composites Segment and the Intermediates and Solvents Marl Facility [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net proceeds from sale of business | 11 |  | 11 |
Income (loss) on acquisitions and divestitures | 11 |  | 11 |
Sale of properties with net book value | 0 |  | 0 |
Discontinued Operations, Held-for-sale [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income (loss) on acquisitions and divestitures | 8 |  | 8 |
Impairment charge | $ 0 |  | 183 |
Discontinued Operations, Held-for-sale [Member] | Goodwill [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment charge |  |  | 1 |
Discontinued Operations, Held-for-sale [Member] | Other Intangible Assets [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment charge |  |  | 134 |
Discontinued Operations, Held-for-sale [Member] | Property, Plant and Equipment [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment charge |  |  | 33 |
Discontinued Operations, Held-for-sale [Member] | Operating Lease Assets Net [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment charge |  |  | 14 |
Discontinued Operations, Held-for-sale [Member] | Other Current Assets [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment charge |  |  | $ 1 |

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