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Discontinued Operations - Components of Consolidated Comprehensive Income (Loss) Related to Discontinued Operations (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income (loss) before taxes |  | $ 558 | $ 105 | $ 303 |
Income from discontinued operations (net of taxes) |  | 481 | 95 | 208 |
Composites/Marl facility [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income (loss) before taxes |  | 118 | 103 | 98 |
Gain on disposal of discontinued operations |  | 423 |  |  |
Benefit (expense) related to income (loss) from discontinued operations |  | (24) | (17) | (23) |
Expense related to gain on disposal of discontinued operations |  | (51) |  |  |
Income from discontinued operations (net of taxes) |  | 94 | 86 | 75 |
Valvoline [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income (loss) before taxes |  |  | (1) | 240 | [1]
Benefit (expense) related to income (loss) from discontinued operations | [1] |  |  | (81) |
Income from discontinued operations (net of taxes) | [1] |  |  | 159 |
Asbestos [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income (loss) before taxes |  |  | 14 | (31) |
Benefit (expense) related to income (loss) from discontinued operations |  |  | (1) | 6 |
Water Technologies [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income (loss) before taxes |  | (1) |  | 1 |
Benefit (expense) related to income (loss) from discontinued operations |  | 2 | 3 | 1 |
Distribution [Member] |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Income (loss) before taxes |  | 18 | (11) | (5) |
Benefit (expense) related to income (loss) from discontinued operations |  | $ (4) | $ 5 | $ 2 |
[1] | Results in 2017 reflect activity through May 12, 2017 when Valvoline was fully separated, as previously discussed.

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