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Interests In Associates And Joint Venture Entities - Summary of Major Shareholdings in Associates and Joint Venture Entities, Including their Profit/(Loss) (Detail) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2018
Disclosure of significant investments in associates and joint ventures [line items] |  |  |
Share of operating profit of equity accounted investments | $ 186 | $ 300 | $ 576
Samarco dam failure provision expense | (70) | (87) | (429)
Profit from equity accounted investments, related impairments and expenses | $ 116 | $ 213 | $ 147
Samarco Mineracao S.A. [member] |  |  |
Disclosure of significant investments in associates and joint ventures [line items] |  |  |
Ownership interest | 50.00% | 50.00% | 50.00%
Share of operating profit of equity accounted investments | $ (47) | $ (50) | $ (80)
Other [member] |  |  |
Disclosure of significant investments in associates and joint ventures [line items] |  |  |
Share of operating profit of equity accounted investments | $ (51) | $ (19) | $ (80)
Carbones del Cerrejon LLC [member] |  |  |
Disclosure of significant investments in associates and joint ventures [line items] |  |  |
Ownership interest | 33.33% | 33.33% | 33.33%
Share of operating profit of equity accounted investments | $ 85 | $ 87 | $ 192
Compania Minera Antamina S.A. [member] |  |  |
Disclosure of significant investments in associates and joint ventures [line items] |  |  |
Ownership interest | 33.75% | 33.75% | 33.75%
Share of operating profit of equity accounted investments | $ 199 | $ 282 | $ 544

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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 amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2018-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2018-03-01&anchor=para_84_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The proportion of ownership interest in an associate attributable to the entity. [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_17_b_iii&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_16_b_iii&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_17_b_iii&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_16_b_iii&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2018-03-16 + Details
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