XML 325 R122.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Finance income and finance costs - Summary of finance income and finance costs (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Material Income And Expense [Abstract] |  |  |
Finance income from equity accounted units (Rio Tinto share) | $ 7 | $ 4 | $ 6
Other finance income (including bank deposits and other financial assets) | 242 | 137 | 83
Total finance income | 249 | 141 | 89
Interest on: |  |  |
– Financial liabilities at amortised cost and associated derivatives | (775) | (819) | (895)
– Finance leases | (2) | (3) | (3)
Fair value movements: |  |  |
– Bonds designated as hedged items in fair value hedges | 96 | 28 | 89
– Derivatives designated as hedging instruments in fair value hedges | (73) | (22) | (89)
Loss on early redemption of bonds | (94) | (256) | (324)
Amounts capitalised | 296 | 224 | 111
Total finance costs | $ (552) | $ (848) | $ (1,111)

X
- 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 2017-01-01 -Paragraph 26 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=23&date=2017-03-01&anchor=para_26_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_BorrowingCostsCapitalised
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- 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 2017-01-01 -Paragraph 82 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_82_b&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_FinanceCosts
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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 2017-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_85&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_FinanceIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-02&anchor=para_112_c&doctype=Standard&book=B -URIDate 2017-03-09 + Details
Name: | ifrs-full_InterestExpenseOnFinanceLeases
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_MaterialIncomeAndExpenseAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_OtherFinanceIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Bonds designated as hedged items in fair value hedges. + References No definition available. + Details
Name: | rio_BondsDesignatedAsHedgedItemsInFairValueHedges
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Derivatives designated as hedging instruments in fair value hedges. + References No definition available. + Details
Name: | rio_DerivativesDesignatedAsHedgingInstrumentsInFairValueHedges
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value movements. + References No definition available. + Details
Name: | rio_FairValueMovementsAbstract
Namespace Prefix: | rio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Finance income from equity accounted units. + References No definition available. + Details
Name: | rio_FinanceIncomeFromEquityAccountedUnits
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Interest on finance. + References No definition available. + Details
Name: | rio_InterestOnFinanceAbstract
Namespace Prefix: | rio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interest on financial liabilities at amortized cost and associated derivatives. + References No definition available. + Details
Name: | rio_InterestOnFinancialLiabilitiesAtAmortizedCostAndAssociatedDerivatives
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss on early redemption of bonds. + References No definition available. + Details
Name: | rio_LossOnEarlyRedemptionOfBonds
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration