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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | $ 574 | $ 641 | $ 1,717 | $ 1,884
Life Sciences [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 189 | 190 | 528 | 556
Life Sciences [Member] | North America [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 58 | 67 | 166 | 193
Life Sciences [Member] | Europe [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 62 | 60 | 174 | 170
Life Sciences [Member] | Asia Pacific [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 50 | 45 | 135 | 140
Life Sciences [Member] | Latin America & Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 19 | 18 | 53 | 53
Personal Care & Household [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 155 | 158 | 451 | 495
Personal Care & Household [Member] | North America [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 42 | 44 | 133 | 135
Personal Care & Household [Member] | Europe [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 65 | 68 | 190 | 217
Personal Care & Household [Member] | Asia Pacific [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 28 | 28 | 74 | 83
Personal Care & Household [Member] | Latin America & Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 20 | 18 | 54 | 60
Specialty Additives [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 135 | 177 | 429 | 494
Specialty Additives [Member] | North America [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 50 | 59 | 148 | 165
Specialty Additives [Member] | Europe [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 48 | 68 | 157 | 180
Specialty Additives [Member] | Asia Pacific [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 29 | 42 | 97 | 120
Specialty Additives [Member] | Latin America & Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 8 | 8 | 27 | 29
Performance Adhesives [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 70 | 88 | 229 | 258
Performance Adhesives [Member] | North America [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 59 | 76 | 196 | 220
Performance Adhesives [Member] | Europe [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 8 | 8 | 24 | 27
Performance Adhesives [Member] | Asia Pacific [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 2 | 2 | 5 | 5
Performance Adhesives [Member] | Latin America & Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 1 | 2 | 4 | 6
Intermediates and Solvents [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 37 | 41 | 102 | 118
Intermediates and Solvents [Member] | North America [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 21 | 28 | 59 | 78
Intermediates and Solvents [Member] | Europe [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 6 | 5 | 17 | 16
Intermediates and Solvents [Member] | Asia Pacific [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | 8 | 7 | 21 | 20
Intermediates and Solvents [Member] | Latin America & Other [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Sales | $ 2 | $ 1 | $ 5 | $ 4

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