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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill Balances | The carrying amount of goodwill attributable to each reportable segment with goodwill balances and the changes in those balances during the six month period ended March 31, 2016 are as follows:
|  | Reinforcement Materials |  |  | Performance Chemicals |  |  | Purification Solutions |  |  | Total |
|  | (Dollars in millions) |
Balance at September 30, 2015 |  | $ | 55 |  |  | $ | 9 |  |  | $ | 90 |  |  | $ | 154 |
Foreign currency impact |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | 1 |
Balance at March 31, 2016 |  | $ | 55 |  |  | $ | 9 |  |  | $ | 91 |  |  | $ | 155 |
Schedule of Intangible Assets | The following table provides information regarding the Company’s intangible assets:
|  | March 31, 2016 |  |  | September 30, 2015 |
|  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Intangible Assets |  |  | Gross Carrying Value |  |  | Accumulated Amortization |  |  | Net Intangible Assets |
|  | (Dollars in millions) |
Intangible assets with finite lives |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technologies |  | $ | 49 |  |  | $ | (2 | ) |  | $ | 47 |  |  | $ | 48 |  |  | $ | (1 | ) |  | $ | 47 |
Trademarks |  |  | 16 |  |  |  | (1 | ) |  |  | 15 |  |  |  | 16 |  |  |  | — |  |  |  | 16 |
Customer relationships |  |  | 95 |  |  |  | (8 | ) |  |  | 87 |  |  |  | 96 |  |  |  | (6 | ) |  |  | 90 |
Total intangible assets |  | $ | 160 |  |  | $ | (11 | ) |  | $ | 149 |  |  | $ | 160 |  |  | $ | (7 | ) |  | $ | 153 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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