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Results of Operations from Oil and Gas Producing Activities (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Results of operations for oil and gas producing activities, by geographic area [Line Items] |  |  |
Sales to affiliated companies | $ 75 | $ 83 | $ 118
Valuation provision | 596 | 102 | 7,232
Results of oil and gas producing activities | (935) | 1 | (5,564)
United States [member] |  |  |
Results of operations for oil and gas producing activities, by geographic area [Line Items] |  |  |
Results of oil and gas producing activities | (1,446) | (520) | (5,904)
United States [member] | Discontinued Operations - Onshore US Cash Generating Units [Member] |  |  |
Results of operations for oil and gas producing activities, by geographic area [Line Items] |  |  |
Results of oil and gas producing activities | $ (465) | $ (564) | $ (5,855)

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- Definition Valuation provisions (impairments) related to oil and gas producing activities. + References No definition available. + Details
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- Definition The results of operations for oil and gas producing activities, excluding corporate overhead and interest costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62299-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447 + Details
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- Definition Sales or transfers to the enterprises other operations from oil and gas producing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62246-109447 + Details
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