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Reportable Segment Information - Summary of Financial Information for Each Reportable Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Sep. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | $ 574 | $ 641 | $ 1,717 | $ 1,884 |
OPERATING INCOME (LOSS) |  | 48 | 43 | (403) | 80 |
DEPRECIATION EXPENSE |  | 41 | 40 | 120 | 160 |
AMORTIZATION EXPENSE |  | 21 | 22 | 63 | 65 |
EBITDA | [1],[2] | 110 | 105 | (216) | 305 |
TOTAL ASSETS |  | 6,986 |  | 6,986 |  | $ 7,251
Life Sciences [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | 189 | 190 | 528 | 556 |
OPERATING INCOME (LOSS) |  | 40 | 32 | 97 | 88 |
DEPRECIATION EXPENSE |  | 8 | 8 | 24 | 24 |
AMORTIZATION EXPENSE |  | 7 | 7 | 21 | 21 |
EBITDA | [1],[2] | 55 | 47 | 142 | 133 |
TOTAL ASSETS |  | 1,979 |  | 1,979 |  | 1,946
Personal Care & Household [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | 155 | 158 | 451 | 495 |
OPERATING INCOME (LOSS) |  | 16 | 17 | (309) | 60 |
DEPRECIATION EXPENSE |  | 10 | 10 | 30 | 30 |
AMORTIZATION EXPENSE |  | 9 | 10 | 27 | 28 |
EBITDA | [1],[2] | 35 | 37 | (252) | 118 |
TOTAL ASSETS |  | 979 |  | 979 |  | 1,366
Consumer Specialties [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | 344 | 348 | 979 | 1,051 |
OPERATING INCOME (LOSS) |  | 56 | 49 | (212) | 148 |
DEPRECIATION EXPENSE |  | 18 | 18 | 54 | 54 |
AMORTIZATION EXPENSE |  | 16 | 17 | 48 | 49 |
EBITDA | [1],[2] | 90 | 84 | (110) | 251 |
TOTAL ASSETS |  | 2,958 |  | 2,958 |  | 3,312
Specialty Additives [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | 135 | 177 | 429 | 494 |
OPERATING INCOME (LOSS) |  | 15 | 19 | (137) | (5) |
DEPRECIATION EXPENSE |  | 15 | 15 | 46 | 84 |
AMORTIZATION EXPENSE |  | 5 | 5 | 14 | 14 |
EBITDA | [1],[2] | 35 | 39 | (77) | 93 |
TOTAL ASSETS |  | 1,642 |  | 1,642 |  | 1,775
Performance Adhesives [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | 70 | 88 | 229 | 258 |
OPERATING INCOME (LOSS) |  | 13 | 16 | 40 | 42 |
DEPRECIATION EXPENSE |  | 4 | 4 | 10 | 11 |
AMORTIZATION EXPENSE |  |  |  | 1 | 1 |
EBITDA | [1],[2] | 17 | 20 | 51 | 54 |
TOTAL ASSETS |  | 595 |  | 595 |  | 618
Industrial Specialties [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | 205 | 265 | 658 | 752 |
OPERATING INCOME (LOSS) |  | 28 | 35 | (97) | 37 |
DEPRECIATION EXPENSE |  | 19 | 19 | 56 | 95 |
AMORTIZATION EXPENSE |  | 5 | 5 | 15 | 15 |
EBITDA | [1],[2] | 52 | 59 | (26) | 147 |
TOTAL ASSETS |  | 2,237 |  | 2,237 |  | 2,393
Intermediates and Solvents [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales |  | 37 | 41 | 102 | 118 |
OPERATING INCOME (LOSS) |  | 7 | 8 | (7) | 20 |
DEPRECIATION EXPENSE |  | 4 | 3 | 10 | 8 |
AMORTIZATION EXPENSE |  |  |  |  | 1 |
EBITDA | [1],[2] | 11 | 11 | 3 | 29 |
TOTAL ASSETS |  | 164 |  | 164 |  | 185
Intermediates and Solvents [Member] | Intersegment Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Sales | [3] | (12) | (13) | (22) | (37) |
Unallocated and Other [Member] |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
OPERATING INCOME (LOSS) |  | (43) | (49) | (87) | (125) |
DEPRECIATION EXPENSE |  |  |  |  | 3 |
EBITDA | [1],[2] | (43) | $ (49) | (83) | $ (122) |
TOTAL ASSETS |  | $ 1,627 |  | $ 1,627 |  | $ 1,361
[1] | Excludes income (loss) from discontinued operations, other net periodic benefit income (expense) and net income (loss) on divestitures. See the Statement of Consolidated Comprehensive Income (Loss) for applicable amounts excluded.
[2] | Includes $39 million of accelerated depreciation for the nine months ended June 30, 2019.
[3] | Intersegment sales from Intermediates and Solvents are accounted for at prices that approximate fair value. All other intersegment sales are accounted for at cost.

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