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Investments - Investments in subsidiaries (Detail) - Rio Tinto plc [member] - United Kingdom [member] | 12 Months Ended
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Dec. 31, 2017
Rio tinto international holdings limited [member] |
Disclosure Of Investments In Subsidiaries Joint Ventures And Associates [Abstract] |
Company of operation, Subsidiary | Rio Tinto International Holdings Limited
Principal activities, Subsidiary | Holding company
Country of incorporation, Subsidiary | UK
Ownership percentage in subsidiary | 100.00%
Rio tinto european holdings limited [member] |
Disclosure Of Investments In Subsidiaries Joint Ventures And Associates [Abstract] |
Company of operation, Subsidiary | Rio Tinto European Holdings Limited
Principal activities, Subsidiary | Holding company
Country of incorporation, Subsidiary | UK
Ownership percentage in subsidiary | 100.00%

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- Definition The name of a subsidiary. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2016-01-13 -Paragraph 17 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2016-03-30&anchor=para_17_b_i&doctype=Standard -URIDate 2016-03-31 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2016-01-13 -Paragraph 16 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2016-03-30&anchor=para_16_b_i&doctype=Standard -URIDate 2016-03-31 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2016-01-13 -Paragraph 12 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2016-03-30&anchor=para_12_a&doctype=Standard -URIDate 2016-03-31 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2016-01-13 -Paragraph 19B -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2016-03-30&anchor=para_19B_a&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2016-01-13 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2016-03-30&anchor=para_17_b_iii&doctype=Standard -URIDate 2016-03-31 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2016-01-13 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2016-03-30&anchor=para_16_b_iii&doctype=Standard -URIDate 2016-03-31 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2016-01-13 -Paragraph 19B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2016-03-30&anchor=para_19B_c&doctype=Standard -URIDate 2016-03-31 + Details
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