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Finance income and finance costs - Summary of finance income and finance costs (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Material Income And Expense [Abstract] |  |  |
Finance income from equity accounted units (Rio Tinto share) | $ 4 | $ 6 | $ 8
Other finance income (including bank deposits and other financial assets) | 137 | 83 | 44
Total finance income | 141 | 89 | 52
Interest on: |  |  |
– Financial liabilities at amortised cost and associated derivatives | (819) | (895) | (972)
– Finance leases | (3) | (3) | (4)
Fair value movements: |  |  |
– Bonds designated as hedged items in fair value hedges | 28 | 89 | (17)
– Derivatives designated as hedging instruments in fair value hedges | (22) | (89) | (11)
Loss on early redemption of bonds | (256) | (324) |
Amounts capitalised | 224 | 111 | 254
Total finance costs | $ (848) | $ (1,111) | $ (750)

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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 23 -IssueDate 2016-01-13 -Paragraph 26 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=23&date=2016-03-30&anchor=para_26_a&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of costs associated with financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 82 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_82_b&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of income associated with interest and other financing activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_85&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of interest expense on finance leases. [Refer: Interest expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2019-01-01 -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_112_c&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition The amount of finance income that the entity does not separately disclose in the same statement or note. [Refer: Finance income] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_112_c&doctype=Standard -URIDate 2016-03-31 + Details
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- Definition Bonds designated as hedged items in fair value hedges. + References No definition available. + Details
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- Definition Derivatives designated as hedging instruments in fair value hedges. + References No definition available. + Details
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- Definition Fair value movements. + References No definition available. + Details
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- Definition Finance income from equity accounted units. + References No definition available. + Details
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- Definition Interest on finance. + References No definition available. + Details
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- Definition Interest on financial liabilities at amortized cost and associated derivatives. + References No definition available. + Details
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- Definition Loss on early redemption of bonds. + References No definition available. + Details
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