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Investments Accounted for Using the Equity Method - Summary of Movements of Investments Accounted for using the Equity Method (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Disclosure of significant investments in associates and joint ventures [Line Items] |  |  |
Profit/(loss) from equity accounted investments, related impairments and expenses | $ 147 | $ 272 | $ (2,104)
Funding provided during the period | (142) |  |
Joint ventures [member] |  |  |
Disclosure of significant investments in associates and joint ventures [Line Items] |  |  |
Profit/(loss) from equity accounted investments, related impairments and expenses | (509) |  |
Funding provided during the period | (80) |  |
Joint ventures [member] | Samarco dam failure [member] |  |  |
Disclosure of significant investments in associates and joint ventures [Line Items] |  |  |
Share of loss | (80) |  |
Funding provided during the period | (80) |  |
Other movements | (429) |  |
Change in estimate | (560) |  |
Exchange translation | $ 131 |  |

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- Definition Disclosure of significant investments in associates and joint ventures. + References No definition available. + Details
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- Definition The entity's share of profit (loss) from associates and joint ventures accounted for using the equity method and related impairments and expenses. + References No definition available. + Details
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- Definition The cash outflow for the purchase of interests in investments accounted for using the equity method. [Refer: Investments accounted for using equity method] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_16&doctype=Standard -URIDate 2017-03-09 + Details
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