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Contingent Liabilities - Summary of Contingent Liabilities (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Jun. 30, 2017
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Disclosure of contingent liabilities [Line Items] |  |
Contingent liabilities | $ 3,503 | $ 3,609
Associates and joint ventures [member] |  |
Disclosure of contingent liabilities [Line Items] |  |
Contingent liabilities | 1,588 | 1,784
Subsidiaries and joint operations [member] |  |
Disclosure of contingent liabilities [Line Items] |  |
Contingent liabilities | $ 1,915 | $ 1,825

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- Definition The amount of the estimated financial effect of contingent liabilities. [Refer: Contingent liabilities [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 86 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_86_a&doctype=Standard -URIDate 2017-03-09 + Details
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