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Goodwill and Intangible Assets - Schedule of Goodwill Balances (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2018 | [2] | Jun. 30, 2018
Goodwill And Intangible Assets [Line Items] |  |  |
Beginning balance |  |  | $ 154
Goodwill acquired | [1] |  | 33
Impairment charge |  | $ (92) | (92)
Foreign currency impact |  |  | (3)
Ending balance |  |  | 92
Reinforcement Materials [Member] |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Beginning balance |  |  | 53
Foreign currency impact |  |  | (2)
Ending balance |  |  | 51
Performance Chemicals [Member] |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Beginning balance |  |  | 9
Goodwill acquired | [1] |  | 33
Foreign currency impact |  |  | (1)
Ending balance |  |  | 41
Purification Solutions [Member] |  |  |
Goodwill And Intangible Assets [Line Items] |  |  |
Beginning balance |  |  | 92
Impairment charge |  | $ (92) | $ (92)
[1] | Consists of goodwill acquired in the acquisition of Tech Blend as described in Note C.
[2] | Refer to Note E for details on the Purification Solutions goodwill impairment test and the resulting impairment charge recorded in the second fiscal quarter of 2018. Based on the Company’s most recent annual goodwill impairment test performed as of May 31, 2018, the fair values of the Reinforcement Materials, Fumed Metal Oxides, and Specialty Compounds reporting units were substantially in excess of their carrying values.

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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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