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Capitalised Costs Relating to Oil and Gas Production Activities (Parenthetical) (Detail) - USD ($) $ in Millions | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
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Capitalized costs relating to oil and gas producing activities by geographic area [line items] |  |  |
Net capitalised costs | $ 10,725 | $ 21,821 | $ 23,936
United States [member] |  |  |
Capitalized costs relating to oil and gas producing activities by geographic area [line items] |  |  |
Net capitalised costs | 4,287 | 14,976 | 16,152
Discontinued operations - Onshore US Cash Generating Units [member] | United States [member] |  |  |
Capitalized costs relating to oil and gas producing activities by geographic area [line items] |  |  |
Net capitalised costs |  | $ 10,672 | $ 11,803

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- Definition Net amount of capitalized costs relating to oil and gas producing activities. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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