XML 55 R47.htm IDEA: XBRL DOCUMENT
v3.20.2

Financial instruments disclosures - Summary of changes in fair value of Level 3 financial assets and financial liabilities (Detail) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2020 USD ($)
Disclosure of detailed information about financial instruments [line items] |
Adjustment on currency translation | $ (298)
Level 3 |
Disclosure of detailed information about financial instruments [line items] |
Opening balance | 383
Adjustment on currency translation | (12)
– net operating costs | (17)
– net operating costs | 48
Total unrealised gains transferred into other comprehensive income | 175
Disposals/maturity of financial instruments | (12)
Closing balance | 565
Total gains included in the income statement for assets and liabilities held at period end | $ 31

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Adjustment on currency translation. + References No definition available. + Details
Name: | rio_AdjustmentOnCurrencyTranslation
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disposal or maturity of financial instruments. + References No definition available. + Details
Name: | rio_DisposalOrMaturityOfFinancialInstruments
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Financial assets and financial liabilities at fair value. + References No definition available. + Details
Name: | rio_FinancialAssetsAndFinancialLiabilitiesAtFairValue
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Gains (losses) recognised in profit or loss for assets and liabilities held. + References No definition available. + Details
Name: | rio_GainsLossesRecognisedInProfitOrLossForAssetsAndLiabilitiesHeld
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total realised gains or losses related to Level 3 financial assets and liabilities included in net operating costs. + References No definition available. + Details
Name: | rio_RealisedGainsLossesIncludedInNetOperatingCosts
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrealised gain or loss transferred into other comprehensive income. + References No definition available. + Details
Name: | rio_UnrealisedGainOrLossTransferredIntoOtherComprehensiveIncome
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total unrealised gains related to Level 3 financial assets and liabilities included in net operating costs. + References No definition available. + Details
Name: | rio_UnrealisedGainsIncludedInNeOperatingCosts
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |