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Discontinued Operations - Reconciliation of Consolidated Income (Loss) From Discontinued Operations (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Income (loss) from discontinued operations attributable to Composites/Marl facility |  |
Research and development expense | $ (17) | $ (19)
Income tax expense | (24) | (10)
Income from discontinued operations | 23 | 28
Composites/Marl facility [Member] |  |
Income (loss) from discontinued operations attributable to Composites/Marl facility |  |
Sales | 275 | 261
Cost of sales | (217) | (211)
Selling, general and administrative expense | (22) | (17)
Research and development expense | (3) | (2)
Equity and other income | 3 | 3
Pretax operating income of discontinued operations | 36 | 34
Net interest and other financing expense | (6) | (4)
Pretax income of discontinued operations | 30 | 30
Income tax expense | (5) | (5)
Income from discontinued operations | $ 25 | $ 25

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