3.20.4 html 1622 1105 1 true 416 0 false 16 false false R1.htm 000010001 - Document - Cover Sheet http://www.riotinto.com/role/Cover Cover Cover 1 false false R2.htm 100010002 - Statement - Group income statement Sheet http://www.riotinto.com/role/Groupincomestatement Group income statement Statements 2 false false R3.htm 100020003 - Statement - Group statement of comprehensive income Sheet http://www.riotinto.com/role/Groupstatementofcomprehensiveincome Group statement of comprehensive income Statements 3 false false R4.htm 100030004 - Statement - Group statement of comprehensive income (Parenthetical) Sheet http://www.riotinto.com/role/GroupstatementofcomprehensiveincomeParenthetical Group statement of comprehensive income (Parenthetical) Statements 4 false false R5.htm 100040005 - Statement - Group cash flow statement Sheet http://www.riotinto.com/role/Groupcashflowstatement Group cash flow statement Statements 5 false false R6.htm 100050006 - Statement - Group cash flow statement (Parenthetical) Sheet http://www.riotinto.com/role/GroupcashflowstatementParenthetical Group cash flow statement (Parenthetical) Statements 6 false false R7.htm 100060007 - Statement - Group balance sheet Sheet http://www.riotinto.com/role/Groupbalancesheet Group balance sheet Statements 7 false false R8.htm 100070008 - Statement - Group statement of changes in equity Sheet http://www.riotinto.com/role/Groupstatementofchangesinequity Group statement of changes in equity Statements 8 false false R9.htm 100080009 - Statement - Group statement of changes in equity (Parenthetical) Sheet http://www.riotinto.com/role/GroupstatementofchangesinequityParenthetical Group statement of changes in equity (Parenthetical) Statements 9 false false R10.htm 210011001 - Disclosure - Principal accounting policies Sheet http://www.riotinto.com/role/Principalaccountingpolicies Principal accounting policies Notes 10 false false R11.htm 210041002 - Disclosure - Operating segments Sheet http://www.riotinto.com/role/Operatingsegments Operating segments Notes 11 false false R12.htm 210151003 - Disclosure - Operating segments - additional information Sheet http://www.riotinto.com/role/Operatingsegmentsadditionalinformation Operating segments - additional information Notes 12 false false R13.htm 210201004 - Disclosure - Net operating costs (excluding items shown separately) Sheet http://www.riotinto.com/role/Netoperatingcostsexcludingitemsshownseparately Net operating costs (excluding items shown separately) Notes 13 false false R14.htm 210241005 - Disclosure - Employment costs Sheet http://www.riotinto.com/role/Employmentcosts Employment costs Notes 14 false false R15.htm 210271006 - Disclosure - Impairment charges Sheet http://www.riotinto.com/role/Impairmentcharges Impairment charges Notes 15 false false R16.htm 210311007 - Disclosure - Share of profit after tax of equity accounted units Sheet http://www.riotinto.com/role/Shareofprofitaftertaxofequityaccountedunits Share of profit after tax of equity accounted units Notes 16 false false R17.htm 210341008 - Disclosure - Finance income and finance costs Sheet http://www.riotinto.com/role/Financeincomeandfinancecosts Finance income and finance costs Notes 17 false false R18.htm 210381009 - Disclosure - Taxation Sheet http://www.riotinto.com/role/Taxation Taxation Notes 18 false false R19.htm 210451010 - Disclosure - Earnings per ordinary share Sheet http://www.riotinto.com/role/Earningsperordinaryshare Earnings per ordinary share Notes 19 false false R20.htm 210491011 - Disclosure - Dividends Sheet http://www.riotinto.com/role/Dividends Dividends Notes 20 false false R21.htm 210561012 - Disclosure - Goodwill Sheet http://www.riotinto.com/role/Goodwill Goodwill Notes 21 false false R22.htm 210631013 - Disclosure - Intangible assets Sheet http://www.riotinto.com/role/Intangibleassets Intangible assets Notes 22 false false R23.htm 210701014 - Disclosure - Property, plant and equipment Sheet http://www.riotinto.com/role/Propertyplantandequipment Property, plant and equipment Notes 23 false false R24.htm 210761015 - Disclosure - Investments in equity accounted units Sheet http://www.riotinto.com/role/Investmentsinequityaccountedunits Investments in equity accounted units Notes 24 false false R25.htm 210801016 - Disclosure - Inventories Sheet http://www.riotinto.com/role/Inventories Inventories Notes 25 false false R26.htm 210841017 - Disclosure - Deferred taxation Sheet http://www.riotinto.com/role/Deferredtaxation Deferred taxation Notes 26 false false R27.htm 210911018 - Disclosure - Receivables and other assets Sheet http://www.riotinto.com/role/Receivablesandotherassets Receivables and other assets Notes 27 false false R28.htm 210951019 - Disclosure - Other financial assets Sheet http://www.riotinto.com/role/Otherfinancialassets Other financial assets Notes 28 false false R29.htm 210991020 - Disclosure - Cash and cash equivalents Sheet http://www.riotinto.com/role/Cashandcashequivalents Cash and cash equivalents Notes 29 false false R30.htm 211031021 - Disclosure - Borrowings and other financial liabilities Sheet http://www.riotinto.com/role/Borrowingsandotherfinancialliabilities Borrowings and other financial liabilities Notes 30 false false R31.htm 211081022 - Disclosure - Leases Sheet http://www.riotinto.com/role/Leases Leases Notes 31 false false R32.htm 211131023 - Disclosure - Consolidated net cash/(debt) Sheet http://www.riotinto.com/role/Consolidatednetcashdebt Consolidated net cash/(debt) Notes 32 false false R33.htm 211171024 - Disclosure - Trade and other payables Sheet http://www.riotinto.com/role/Tradeandotherpayables Trade and other payables Notes 33 false false R34.htm 211211025 - Disclosure - Provisions (including post-retirement benefits) Sheet http://www.riotinto.com/role/Provisionsincludingpostretirementbenefits Provisions (including post-retirement benefits) Notes 34 false false R35.htm 211261026 - Disclosure - Share capital - Rio Tinto plc Sheet http://www.riotinto.com/role/SharecapitalRioTintoplc Share capital - Rio Tinto plc Notes 35 false false R36.htm 211311027 - Disclosure - Share Capital - Rio Tinto Limited Sheet http://www.riotinto.com/role/ShareCapitalRioTintoLimited Share Capital - Rio Tinto Limited Notes 36 false false R37.htm 211361028 - Disclosure - Other reserves and retained earnings Sheet http://www.riotinto.com/role/Otherreservesandretainedearnings Other reserves and retained earnings Notes 37 false false R38.htm 211401029 - Disclosure - Financial instruments and risk management Sheet http://www.riotinto.com/role/Financialinstrumentsandriskmanagement Financial instruments and risk management Notes 38 false false R39.htm 211621030 - Disclosure - Contingencies and commitments Sheet http://www.riotinto.com/role/Contingenciesandcommitments Contingencies and commitments Notes 39 false false R40.htm 211681031 - Disclosure - Average number of employees Sheet http://www.riotinto.com/role/Averagenumberofemployees Average number of employees Notes 40 false false R41.htm 211711032 - Disclosure - Principal subsidiaries Sheet http://www.riotinto.com/role/Principalsubsidiaries Principal subsidiaries Notes 41 false false R42.htm 211751033 - Disclosure - Principal joint operations Sheet http://www.riotinto.com/role/Principaljointoperations Principal joint operations Notes 42 false false R43.htm 211791034 - Disclosure - Principal joint ventures Sheet http://www.riotinto.com/role/Principaljointventures Principal joint ventures Notes 43 false false R44.htm 211861035 - Disclosure - Principal associates Sheet http://www.riotinto.com/role/Principalassociates Principal associates Notes 44 false false R45.htm 211931036 - Disclosure - Purchases and sales of subsidiaries, joint ventures, associates and other interests in businesses Sheet http://www.riotinto.com/role/Purchasesandsalesofsubsidiariesjointventuresassociatesandotherinterestsinbusinesses Purchases and sales of subsidiaries, joint ventures, associates and other interests in businesses Notes 45 false false R46.htm 211951037 - Disclosure - Directors' and key management remuneration Sheet http://www.riotinto.com/role/Directorsandkeymanagementremuneration Directors' and key management remuneration Notes 46 false false R47.htm 212001038 - Disclosure - Auditors' remuneration Sheet http://www.riotinto.com/role/Auditorsremuneration Auditors' remuneration Notes 47 false false R48.htm 212031039 - Disclosure - Related-party transactions Sheet http://www.riotinto.com/role/Relatedpartytransactions Related-party transactions Notes 48 false false R49.htm 212061040 - Disclosure - Exchange rates in US$ Sheet http://www.riotinto.com/role/ExchangeratesinUS Exchange rates in US$ Notes 49 false false R50.htm 212091041 - Disclosure - Share-based payments Sheet http://www.riotinto.com/role/Sharebasedpayments Share-based payments Notes 50 false false R51.htm 212151042 - Disclosure - Post-retirement benefits Sheet http://www.riotinto.com/role/Postretirementbenefits Post-retirement benefits Notes 51 false false R52.htm 212301043 - Disclosure - Events after the balance sheet date Sheet http://www.riotinto.com/role/Eventsafterthebalancesheetdate Events after the balance sheet date Notes 52 false false R53.htm 212321044 - Disclosure - Rio Tinto financial information by business unit Sheet http://www.riotinto.com/role/RioTintofinancialinformationbybusinessunit Rio Tinto financial information by business unit Notes 53 false false R54.htm 220022001 - Disclosure - Principal accounting policies (Policies) Sheet http://www.riotinto.com/role/PrincipalaccountingpoliciesPolicies Principal accounting policies (Policies) Policies 54 false false R55.htm 230053001 - Disclosure - Operating segments (Tables) Sheet http://www.riotinto.com/role/OperatingsegmentsTables Operating segments (Tables) Tables http://www.riotinto.com/role/Operatingsegments 55 false false R56.htm 230163002 - Disclosure - Operating segments - additional information (Tables) Sheet http://www.riotinto.com/role/OperatingsegmentsadditionalinformationTables Operating segments - additional information (Tables) Tables http://www.riotinto.com/role/Operatingsegmentsadditionalinformation 56 false false R57.htm 230213003 - Disclosure - Net operating costs (excluding items shown separately) (Tables) Sheet http://www.riotinto.com/role/NetoperatingcostsexcludingitemsshownseparatelyTables Net operating costs (excluding items shown separately) (Tables) Tables http://www.riotinto.com/role/Netoperatingcostsexcludingitemsshownseparately 57 false false R58.htm 230253004 - Disclosure - Employment costs (Tables) Sheet http://www.riotinto.com/role/EmploymentcostsTables Employment costs (Tables) Tables http://www.riotinto.com/role/Employmentcosts 58 false false R59.htm 230283005 - Disclosure - Impairment charges - (Tables) Sheet http://www.riotinto.com/role/ImpairmentchargesTables Impairment charges - (Tables) Tables http://www.riotinto.com/role/Impairmentcharges 59 false false R60.htm 230323006 - Disclosure - Share of profit after tax of equity accounted units (Tables) Sheet http://www.riotinto.com/role/ShareofprofitaftertaxofequityaccountedunitsTables Share of profit after tax of equity accounted units (Tables) Tables http://www.riotinto.com/role/Shareofprofitaftertaxofequityaccountedunits 60 false false R61.htm 230353007 - Disclosure - Finance income and finance costs (Tables) Sheet http://www.riotinto.com/role/FinanceincomeandfinancecostsTables Finance income and finance costs (Tables) Tables http://www.riotinto.com/role/Financeincomeandfinancecosts 61 false false R62.htm 230393008 - Disclosure - Taxation (Tables) Sheet http://www.riotinto.com/role/TaxationTables Taxation (Tables) Tables http://www.riotinto.com/role/Taxation 62 false false R63.htm 230463009 - Disclosure - Earnings per ordinary share (Tables) Sheet http://www.riotinto.com/role/EarningsperordinaryshareTables Earnings per ordinary share (Tables) Tables http://www.riotinto.com/role/Earningsperordinaryshare 63 false false R64.htm 230503010 - Disclosure - Dividends (Tables) Sheet http://www.riotinto.com/role/DividendsTables Dividends (Tables) Tables http://www.riotinto.com/role/Dividends 64 false false R65.htm 230573011 - Disclosure - Goodwill (Tables) Sheet http://www.riotinto.com/role/GoodwillTables Goodwill (Tables) Tables http://www.riotinto.com/role/Goodwill 65 false false R66.htm 230643012 - Disclosure - Intangible assets (Tables) Sheet http://www.riotinto.com/role/IntangibleassetsTables Intangible assets (Tables) Tables http://www.riotinto.com/role/Intangibleassets 66 false false R67.htm 230713013 - Disclosure - Property, plant and equipment (Tables) Sheet http://www.riotinto.com/role/PropertyplantandequipmentTables Property, plant and equipment (Tables) Tables http://www.riotinto.com/role/Propertyplantandequipment 67 false false R68.htm 230773014 - Disclosure - Investments in equity accounted units (Tables) Sheet http://www.riotinto.com/role/InvestmentsinequityaccountedunitsTables Investments in equity accounted units (Tables) Tables http://www.riotinto.com/role/Investmentsinequityaccountedunits 68 false false R69.htm 230813015 - Disclosure - Inventories (Tables) Sheet http://www.riotinto.com/role/InventoriesTables Inventories (Tables) Tables http://www.riotinto.com/role/Inventories 69 false false R70.htm 230853016 - Disclosure - Deferred taxation (Tables) Sheet http://www.riotinto.com/role/DeferredtaxationTables Deferred taxation (Tables) Tables http://www.riotinto.com/role/Deferredtaxation 70 false false R71.htm 230923017 - Disclosure - Receivables and other assets (Tables) Sheet http://www.riotinto.com/role/ReceivablesandotherassetsTables Receivables and other assets (Tables) Tables http://www.riotinto.com/role/Receivablesandotherassets 71 false false R72.htm 230963018 - Disclosure - Other financial assets (Tables) Sheet http://www.riotinto.com/role/OtherfinancialassetsTables Other financial assets (Tables) Tables http://www.riotinto.com/role/Otherfinancialassets 72 false false R73.htm 231003019 - Disclosure - Cash and cash equivalents (Tables) Sheet http://www.riotinto.com/role/CashandcashequivalentsTables Cash and cash equivalents (Tables) Tables http://www.riotinto.com/role/Cashandcashequivalents 73 false false R74.htm 231043020 - Disclosure - Borrowings and other financial liabilities (Tables) Sheet http://www.riotinto.com/role/BorrowingsandotherfinancialliabilitiesTables Borrowings and other financial liabilities (Tables) Tables http://www.riotinto.com/role/Borrowingsandotherfinancialliabilities 74 false false R75.htm 231093021 - Disclosure - Leases (Tables) Sheet http://www.riotinto.com/role/LeasesTables Leases (Tables) Tables http://www.riotinto.com/role/Leases 75 false false R76.htm 231143022 - Disclosure - Consolidated net cash/(debt) (Tables) Sheet http://www.riotinto.com/role/ConsolidatednetcashdebtTables Consolidated net cash/(debt) (Tables) Tables http://www.riotinto.com/role/Consolidatednetcashdebt 76 false false R77.htm 231183023 - Disclosure - Trade and other payables (Tables) Sheet http://www.riotinto.com/role/TradeandotherpayablesTables Trade and other payables (Tables) Tables http://www.riotinto.com/role/Tradeandotherpayables 77 false false R78.htm 231223024 - Disclosure - Provisions (including post-retirement benefits) (Tables) Sheet http://www.riotinto.com/role/ProvisionsincludingpostretirementbenefitsTables Provisions (including post-retirement benefits) (Tables) Tables http://www.riotinto.com/role/Provisionsincludingpostretirementbenefits 78 false false R79.htm 231273025 - Disclosure - Share capital - Rio Tinto plc (Tables) Sheet http://www.riotinto.com/role/SharecapitalRioTintoplcTables Share capital - Rio Tinto plc (Tables) Tables http://www.riotinto.com/role/SharecapitalRioTintoplc 79 false false R80.htm 231323026 - Disclosure - Share capital - Rio Tinto Limited (Tables) Sheet http://www.riotinto.com/role/SharecapitalRioTintoLimitedTables Share capital - Rio Tinto Limited (Tables) Tables 80 false false R81.htm 231373027 - Disclosure - Other reserves and retained earnings (Tables) Sheet http://www.riotinto.com/role/OtherreservesandretainedearningsTables Other reserves and retained earnings (Tables) Tables http://www.riotinto.com/role/Otherreservesandretainedearnings 81 false false R82.htm 231413028 - Disclosure - Financial instruments and risk management (Tables) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementTables Financial instruments and risk management (Tables) Tables http://www.riotinto.com/role/Financialinstrumentsandriskmanagement 82 false false R83.htm 231633029 - Disclosure - Contingencies and commitments (Tables) Sheet http://www.riotinto.com/role/ContingenciesandcommitmentsTables Contingencies and commitments (Tables) Tables http://www.riotinto.com/role/Contingenciesandcommitments 83 false false R84.htm 231693030 - Disclosure - Average number of employees (Tables) Sheet http://www.riotinto.com/role/AveragenumberofemployeesTables Average number of employees (Tables) Tables http://www.riotinto.com/role/Averagenumberofemployees 84 false false R85.htm 231723031 - Disclosure - Principal subsidiaries Principal subsidiaries - (Tables) Sheet http://www.riotinto.com/role/PrincipalsubsidiariesPrincipalsubsidiariesTables Principal subsidiaries Principal subsidiaries - (Tables) Tables 85 false false R86.htm 231763032 - Disclosure - Principal joint operations (Tables) Sheet http://www.riotinto.com/role/PrincipaljointoperationsTables Principal joint operations (Tables) Tables http://www.riotinto.com/role/Principaljointoperations 86 false false R87.htm 231803033 - Disclosure - Principal joint ventures (Tables) Sheet http://www.riotinto.com/role/PrincipaljointventuresTables Principal joint ventures (Tables) Tables http://www.riotinto.com/role/Principaljointventures 87 false false R88.htm 231873034 - Disclosure - Principal associates (Tables) Sheet http://www.riotinto.com/role/PrincipalassociatesTables Principal associates (Tables) Tables http://www.riotinto.com/role/Principalassociates 88 false false R89.htm 231963035 - Disclosure - Directors' and key management remuneration (Tables) Sheet http://www.riotinto.com/role/DirectorsandkeymanagementremunerationTables Directors' and key management remuneration (Tables) Tables http://www.riotinto.com/role/Directorsandkeymanagementremuneration 89 false false R90.htm 232013036 - Disclosure - Auditors' remuneration (Tables) Sheet http://www.riotinto.com/role/AuditorsremunerationTables Auditors' remuneration (Tables) Tables http://www.riotinto.com/role/Auditorsremuneration 90 false false R91.htm 232043037 - Disclosure - Related-party transactions (Tables) Sheet http://www.riotinto.com/role/RelatedpartytransactionsTables Related-party transactions (Tables) Tables http://www.riotinto.com/role/Relatedpartytransactions 91 false false R92.htm 232073038 - Disclosure - Exchange rates in US$ (Tables) Sheet http://www.riotinto.com/role/ExchangeratesinUSTables Exchange rates in US$ (Tables) Tables http://www.riotinto.com/role/ExchangeratesinUS 92 false false R93.htm 232103039 - Disclosure - Share-based payments (Tables) Sheet http://www.riotinto.com/role/SharebasedpaymentsTables Share-based payments (Tables) Tables http://www.riotinto.com/role/Sharebasedpayments 93 false false R94.htm 232163040 - Disclosure - Post-retirement benefits (Tables) Sheet http://www.riotinto.com/role/PostretirementbenefitsTables Post-retirement benefits (Tables) Tables http://www.riotinto.com/role/Postretirementbenefits 94 false false R95.htm 232333041 - Disclosure - Rio Tinto financial information by business unit (Tables) Sheet http://www.riotinto.com/role/RioTintofinancialinformationbybusinessunitTables Rio Tinto financial information by business unit (Tables) Tables http://www.riotinto.com/role/RioTintofinancialinformationbybusinessunit 95 false false R96.htm 240034001 - Disclosure - Principal accounting policies - Additional information (Detail) Sheet http://www.riotinto.com/role/PrincipalaccountingpoliciesAdditionalinformationDetail Principal accounting policies - Additional information (Detail) Details 96 false false R97.htm 240064002 - Disclosure - Operating segments - Summary of gross sales revenue within the reportable segments (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsSummaryofgrosssalesrevenuewithinthereportablesegmentsDetail Operating segments - Summary of gross sales revenue within the reportable segments (Detail) Details 97 false false R98.htm 240074003 - Disclosure - Operating segments - Summary of capital expenditure within the reportable segments (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsSummaryofcapitalexpenditurewithinthereportablesegmentsDetail Operating segments - Summary of capital expenditure within the reportable segments (Detail) Details 98 false false R99.htm 240084004 - Disclosure - Operating segments - Summary of depreciation and amortisation within the reportable segments (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsSummaryofdepreciationandamortisationwithinthereportablesegmentsDetail Operating segments - Summary of depreciation and amortisation within the reportable segments (Detail) Details 99 false false R100.htm 240094005 - Disclosure - Operating segments - Summary of tax charge within the reportable segments (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsSummaryoftaxchargewithinthereportablesegmentsDetail Operating segments - Summary of tax charge within the reportable segments (Detail) Details 100 false false R101.htm 240104006 - Disclosure - Operating segments - Summary of Underlying EBITDA (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsSummaryofUnderlyingEBITDADetail Operating segments - Summary of Underlying EBITDA (Detail) Details 101 false false R102.htm 240114007 - Disclosure - Operating segments - Summary of underlying earnings within the reportable segments (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsSummaryofunderlyingearningswithinthereportablesegmentsDetail Operating segments - Summary of underlying earnings within the reportable segments (Detail) Details 102 false false R103.htm 240124008 - Disclosure - Operating segments - Reconciliation of net earnings/(losses) to underlying earnings (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsReconciliationofnetearningslossestounderlyingearningsDetail Operating segments - Reconciliation of net earnings/(losses) to underlying earnings (Detail) Details 103 false false R104.htm 240134009 - Disclosure - Operating segments - Reconciliation of net earnings/(losses) to underlying earnings (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsReconciliationofnetearningslossestounderlyingearningsParentheticalDetail Operating segments - Reconciliation of net earnings/(losses) to underlying earnings (Parenthetical) (Detail) Details 104 false false R105.htm 240144010 - Disclosure - Operating segments - Additional information (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsAdditionalinformationDetail Operating segments - Additional information (Detail) Details 105 false false R106.htm 240174011 - Disclosure - Operating segments - additional information - Consolidated sales revenue by destination (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsadditionalinformationConsolidatedsalesrevenuebydestinationDetail Operating segments - additional information - Consolidated sales revenue by destination (Detail) Details 106 false false R107.htm 240184012 - Disclosure - Operating segments - additional information - Consolidated sales revenue by product (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsadditionalinformationConsolidatedsalesrevenuebyproductDetail Operating segments - additional information - Consolidated sales revenue by product (Detail) Details 107 false false R108.htm 240194013 - Disclosure - Operating segments - additional information - Summary of non-current assets other than excluded items (Detail) Sheet http://www.riotinto.com/role/OperatingsegmentsadditionalinformationSummaryofnoncurrentassetsotherthanexcludeditemsDetail Operating segments - additional information - Summary of non-current assets other than excluded items (Detail) Details 108 false false R109.htm 240224014 - Disclosure - Net operating costs (excluding items shown separately) - Summary of net operating costs (excluding items shown separately) (Detail) Sheet http://www.riotinto.com/role/NetoperatingcostsexcludingitemsshownseparatelySummaryofnetoperatingcostsexcludingitemsshownseparatelyDetail Net operating costs (excluding items shown separately) - Summary of net operating costs (excluding items shown separately) (Detail) Details http://www.riotinto.com/role/NetoperatingcostsexcludingitemsshownseparatelyTables 109 false false R110.htm 240234015 - Disclosure - Net operating costs (excluding items shown separately) - Summary of net operating costs (excluding items shown separately) Footnotes (Detail) Notes http://www.riotinto.com/role/NetoperatingcostsexcludingitemsshownseparatelySummaryofnetoperatingcostsexcludingitemsshownseparatelyFootnotesDetail Net operating costs (excluding items shown separately) - Summary of net operating costs (excluding items shown separately) Footnotes (Detail) Details http://www.riotinto.com/role/NetoperatingcostsexcludingitemsshownseparatelyTables 110 false false R111.htm 240264016 - Disclosure - Employment costs - Summary of employment costs (Detail) Sheet http://www.riotinto.com/role/EmploymentcostsSummaryofemploymentcostsDetail Employment costs - Summary of employment costs (Detail) Details 111 false false R112.htm 240294017 - Disclosure - Impairment charges - Summary of impairment charges (Detail) Sheet http://www.riotinto.com/role/ImpairmentchargesSummaryofimpairmentchargesDetail Impairment charges - Summary of impairment charges (Detail) Details 112 false false R113.htm 240304018 - Disclosure - Impairment charges - Additional information (Detail) Sheet http://www.riotinto.com/role/ImpairmentchargesAdditionalinformationDetail Impairment charges - Additional information (Detail) Details 113 false false R114.htm 240334019 - Disclosure - Share of profit after tax of equity accounted units - Summary of share of profit after tax of equity accounted units (Detail) Sheet http://www.riotinto.com/role/ShareofprofitaftertaxofequityaccountedunitsSummaryofshareofprofitaftertaxofequityaccountedunitsDetail Share of profit after tax of equity accounted units - Summary of share of profit after tax of equity accounted units (Detail) Details 114 false false R115.htm 240364020 - Disclosure - Finance income and finance costs - Summary of finance income and finance costs (Detail) Sheet http://www.riotinto.com/role/FinanceincomeandfinancecostsSummaryoffinanceincomeandfinancecostsDetail Finance income and finance costs - Summary of finance income and finance costs (Detail) Details 115 false false R116.htm 240374021 - Disclosure - Finance income and finance costs - Summary of finance income and finance costs (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/FinanceincomeandfinancecostsSummaryoffinanceincomeandfinancecostsParentheticalDetail Finance income and finance costs - Summary of finance income and finance costs (Parenthetical) (Detail) Details 116 false false R117.htm 240404022 - Disclosure - Taxation - Summary of taxation charge (Detail) Sheet http://www.riotinto.com/role/TaxationSummaryoftaxationchargeDetail Taxation - Summary of taxation charge (Detail) Details 117 false false R118.htm 240414023 - Disclosure - Taxation - Summary of prima facie tax reconciliation (Detail) Sheet http://www.riotinto.com/role/TaxationSummaryofprimafacietaxreconciliationDetail Taxation - Summary of prima facie tax reconciliation (Detail) Details 118 false false R119.htm 240424024 - Disclosure - Taxation - Summary of prima facie tax reconciliation (Footnotes) (Detail) Notes http://www.riotinto.com/role/TaxationSummaryofprimafacietaxreconciliationFootnotesDetail Taxation - Summary of prima facie tax reconciliation (Footnotes) (Detail) Details 119 false false R120.htm 240434025 - Disclosure - Taxation - Summary of tax relating to components of other comprehensive income or loss (Detail) Sheet http://www.riotinto.com/role/TaxationSummaryoftaxrelatingtocomponentsofothercomprehensiveincomeorlossDetail Taxation - Summary of tax relating to components of other comprehensive income or loss (Detail) Details 120 false false R121.htm 240444026 - Disclosure - Taxation - Summary of tax relating to components of other comprehensive income or loss (Footnotes) (Detail) Notes http://www.riotinto.com/role/TaxationSummaryoftaxrelatingtocomponentsofothercomprehensiveincomeorlossFootnotesDetail Taxation - Summary of tax relating to components of other comprehensive income or loss (Footnotes) (Detail) Details 121 false false R122.htm 240474027 - Disclosure - Earnings per ordinary share - Summary of earnings (loss) per ordinary shares (Detail) Sheet http://www.riotinto.com/role/EarningsperordinaryshareSummaryofearningslossperordinarysharesDetail Earnings per ordinary share - Summary of earnings (loss) per ordinary shares (Detail) Details 122 false false R123.htm 240484028 - Disclosure - Earnings per ordinary share - Summary of earnings (loss) per ordinary shares (Footnotes) (Detail) Notes http://www.riotinto.com/role/EarningsperordinaryshareSummaryofearningslossperordinarysharesFootnotesDetail Earnings per ordinary share - Summary of earnings (loss) per ordinary shares (Footnotes) (Detail) Details 123 false false R124.htm 240514029 - Disclosure - Dividends - Summary of dividends paid (Detail) Sheet http://www.riotinto.com/role/DividendsSummaryofdividendspaidDetail Dividends - Summary of dividends paid (Detail) Details 124 false false R125.htm 240524030 - Disclosure - Dividends - Summary of dividends per share (Detail) Sheet http://www.riotinto.com/role/DividendsSummaryofdividendspershareDetail Dividends - Summary of dividends per share (Detail) Details 125 false false R126.htm 240534031 - Disclosure - Dividends - Summary of dividends per share (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/DividendsSummaryofdividendspershareParentheticalDetail Dividends - Summary of dividends per share (Parenthetical) (Detail) Details 126 false false R127.htm 240544032 - Disclosure - Dividends - Summary of number of shares dividend distributed (Detail) Sheet http://www.riotinto.com/role/DividendsSummaryofnumberofsharesdividenddistributedDetail Dividends - Summary of number of shares dividend distributed (Detail) Details 127 false false R128.htm 240554033 - Disclosure - Dividends - Additional information (Detail) Sheet http://www.riotinto.com/role/DividendsAdditionalinformationDetail Dividends - Additional information (Detail) Details 128 false false R129.htm 240584034 - Disclosure - Goodwill - Summary of goodwill (Detail) Sheet http://www.riotinto.com/role/GoodwillSummaryofgoodwillDetail Goodwill - Summary of goodwill (Detail) Details 129 false false R130.htm 240594035 - Disclosure - Goodwill - Summary of Allocated goodwill (Detail) Sheet http://www.riotinto.com/role/GoodwillSummaryofAllocatedgoodwillDetail Goodwill - Summary of Allocated goodwill (Detail) Details 130 false false R131.htm 240604036 - Disclosure - Goodwill - Additional information (Detail) Sheet http://www.riotinto.com/role/GoodwillAdditionalinformationDetail Goodwill - Additional information (Detail) Details 131 false false R132.htm 240614037 - Disclosure - Goodwill - Key assumptions calculation of fair value less costs of disposal (Detail) Sheet http://www.riotinto.com/role/GoodwillKeyassumptionscalculationoffairvaluelesscostsofdisposalDetail Goodwill - Key assumptions calculation of fair value less costs of disposal (Detail) Details 132 false false R133.htm 240624038 - Disclosure - Goodwill - Key assumptions calculation of fair value less costs of disposal (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/GoodwillKeyassumptionscalculationoffairvaluelesscostsofdisposalParentheticalDetail Goodwill - Key assumptions calculation of fair value less costs of disposal (Parenthetical) (Detail) Details 133 false false R134.htm 240654039 - Disclosure - Intangible assets - Summary of intangible assets (Detail) Sheet http://www.riotinto.com/role/IntangibleassetsSummaryofintangibleassetsDetail Intangible assets - Summary of intangible assets (Detail) Details 134 false false R135.htm 240664040 - Disclosure - Intangible assets - Summary of intangible assets (Footnotes) (Detail) Notes http://www.riotinto.com/role/IntangibleassetsSummaryofintangibleassetsFootnotesDetail Intangible assets - Summary of intangible assets (Footnotes) (Detail) Details 135 false false R136.htm 240674041 - Disclosure - Intangible assets - Summary of exploration and evaluation expenditure (Detail) Sheet http://www.riotinto.com/role/IntangibleassetsSummaryofexplorationandevaluationexpenditureDetail Intangible assets - Summary of exploration and evaluation expenditure (Detail) Details 136 false false R137.htm 240684042 - Disclosure - Intangible assets - Summary of exploration and evaluation expenditure (Parenthetical and Footnotes) (Detail) Notes http://www.riotinto.com/role/IntangibleassetsSummaryofexplorationandevaluationexpenditureParentheticalandFootnotesDetail Intangible assets - Summary of exploration and evaluation expenditure (Parenthetical and Footnotes) (Detail) Details 137 false false R138.htm 240694043 - Disclosure - Intangible assets - Additional information (Detail) Sheet http://www.riotinto.com/role/IntangibleassetsAdditionalinformationDetail Intangible assets - Additional information (Detail) Details 138 false false R139.htm 240724044 - Disclosure - Property, plant and equipment Property, plant and equipment - Summary of owned and leased assets (Detail) Sheet http://www.riotinto.com/role/PropertyplantandequipmentPropertyplantandequipmentSummaryofownedandleasedassetsDetail Property, plant and equipment Property, plant and equipment - Summary of owned and leased assets (Detail) Details 139 false false R140.htm 240734045 - Disclosure - Property, plant and equipment - Summary of property, plant and equipment (Detail) Sheet http://www.riotinto.com/role/PropertyplantandequipmentSummaryofpropertyplantandequipmentDetail Property, plant and equipment - Summary of property, plant and equipment (Detail) Details 140 false false R141.htm 240744046 - Disclosure - Property, plant and equipment - Summary of property, plant and equipment (Footnotes) (Detail) Notes http://www.riotinto.com/role/PropertyplantandequipmentSummaryofpropertyplantandequipmentFootnotesDetail Property, plant and equipment - Summary of property, plant and equipment (Footnotes) (Detail) Details 141 false false R142.htm 240754047 - Disclosure - Property, plant and equipment Property, plant, and equipment - Summary of Right-of-Use Assets (Detail) Sheet http://www.riotinto.com/role/PropertyplantandequipmentPropertyplantandequipmentSummaryofRightofUseAssetsDetail Property, plant and equipment Property, plant, and equipment - Summary of Right-of-Use Assets (Detail) Details 142 false false R143.htm 240784048 - Disclosure - Investments in equity accounted units - Summary of Investments in equity accounted units (Detail) Sheet http://www.riotinto.com/role/InvestmentsinequityaccountedunitsSummaryofInvestmentsinequityaccountedunitsDetail Investments in equity accounted units - Summary of Investments in equity accounted units (Detail) Details 143 false false R144.htm 240794049 - Disclosure - Investments in equity accounted units - Additional information (Detail) Sheet http://www.riotinto.com/role/InvestmentsinequityaccountedunitsAdditionalinformationDetail Investments in equity accounted units - Additional information (Detail) Details 144 false false R145.htm 240824050 - Disclosure - Inventories - Summary of inventories (Detail) Sheet http://www.riotinto.com/role/InventoriesSummaryofinventoriesDetail Inventories - Summary of inventories (Detail) Details 145 false false R146.htm 240834051 - Disclosure - Inventories - Additional information (Detail) Sheet http://www.riotinto.com/role/InventoriesAdditionalinformationDetail Inventories - Additional information (Detail) Details 146 false false R147.htm 240864052 - Disclosure - Deferred Taxation - Reconciliation of changes in deferred tax liability asset (Detail) Sheet http://www.riotinto.com/role/DeferredTaxationReconciliationofchangesindeferredtaxliabilityassetDetail Deferred Taxation - Reconciliation of changes in deferred tax liability asset (Detail) Details 147 false false R148.htm 240874053 - Disclosure - Deferred Taxation - Deferred tax liabilities and assets, prior to offsetting of balances (Detail) Sheet http://www.riotinto.com/role/DeferredTaxationDeferredtaxliabilitiesandassetspriortooffsettingofbalancesDetail Deferred Taxation - Deferred tax liabilities and assets, prior to offsetting of balances (Detail) Details 148 false false R149.htm 240884054 - Disclosure - Deferred Taxation - Deferred tax liabilities and assets, prior to offsetting of balances (Footnotes) (Detail) Notes http://www.riotinto.com/role/DeferredTaxationDeferredtaxliabilitiesandassetspriortooffsettingofbalancesFootnotesDetail Deferred Taxation - Deferred tax liabilities and assets, prior to offsetting of balances (Footnotes) (Detail) Details 149 false false R150.htm 240894055 - Disclosure - Deferred Taxation - Recognised and unrecognised amounts in deferred tax assets (Detail) Sheet http://www.riotinto.com/role/DeferredTaxationRecognisedandunrecognisedamountsindeferredtaxassetsDetail Deferred Taxation - Recognised and unrecognised amounts in deferred tax assets (Detail) Details 150 false false R151.htm 240904056 - Disclosure - Deferred Taxation - Recognised and unrecognised amounts in deferred tax assets (Footnotes) (Detail) Notes http://www.riotinto.com/role/DeferredTaxationRecognisedandunrecognisedamountsindeferredtaxassetsFootnotesDetail Deferred Taxation - Recognised and unrecognised amounts in deferred tax assets (Footnotes) (Detail) Details 151 false false R152.htm 240934057 - Disclosure - Receivables and other assets - Summary of trade and other receivables (Detail) Sheet http://www.riotinto.com/role/ReceivablesandotherassetsSummaryoftradeandotherreceivablesDetail Receivables and other assets - Summary of trade and other receivables (Detail) Details 152 false false R153.htm 240944058 - Disclosure - Receivables and other assets - Summary of trade and other receivables (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/ReceivablesandotherassetsSummaryoftradeandotherreceivablesParentheticalDetail Receivables and other assets - Summary of trade and other receivables (Parenthetical) (Detail) Details 153 false false R154.htm 240974059 - Disclosure - Other financial assets - Summary of other financial assets including non-quasi equity loans to equity accounted units (Detail) Sheet http://www.riotinto.com/role/OtherfinancialassetsSummaryofotherfinancialassetsincludingnonquasiequityloanstoequityaccountedunitsDetail Other financial assets - Summary of other financial assets including non-quasi equity loans to equity accounted units (Detail) Details 154 false false R155.htm 240984060 - Disclosure - Other financial assets - Summary of other financial assets including non-quasi equity loans to equity accounted units (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/OtherfinancialassetsSummaryofotherfinancialassetsincludingnonquasiequityloanstoequityaccountedunitsParentheticalDetail Other financial assets - Summary of other financial assets including non-quasi equity loans to equity accounted units (Parenthetical) (Detail) Details 155 false false R156.htm 241014061 - Disclosure - Cash and cash equivalents - Summary of cash and cash equivalents (Detail) Sheet http://www.riotinto.com/role/CashandcashequivalentsSummaryofcashandcashequivalentsDetail Cash and cash equivalents - Summary of cash and cash equivalents (Detail) Details 156 false false R157.htm 241024062 - Disclosure - Cash and cash equivalents - Additional information (Detail) Sheet http://www.riotinto.com/role/CashandcashequivalentsAdditionalinformationDetail Cash and cash equivalents - Additional information (Detail) Details 157 false false R158.htm 241054063 - Disclosure - Borrowings and other financial liabilities - Summary of detailed information about borrowings (Detail) Sheet http://www.riotinto.com/role/BorrowingsandotherfinancialliabilitiesSummaryofdetailedinformationaboutborrowingsDetail Borrowings and other financial liabilities - Summary of detailed information about borrowings (Detail) Details 158 false false R159.htm 241064064 - Disclosure - Borrowings and other financial liabilities - Summary of detailed information about borrowings (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/BorrowingsandotherfinancialliabilitiesSummaryofdetailedinformationaboutborrowingsParentheticalDetail Borrowings and other financial liabilities - Summary of detailed information about borrowings (Parenthetical) (Detail) Details 159 false false R160.htm 241074065 - Disclosure - Borrowings and other financial liabilities - Summary of borrowings and other financial liabilities (Detail) Sheet http://www.riotinto.com/role/BorrowingsandotherfinancialliabilitiesSummaryofborrowingsandotherfinancialliabilitiesDetail Borrowings and other financial liabilities - Summary of borrowings and other financial liabilities (Detail) Details 160 false false R161.htm 241104066 - Disclosure - Leases Leases - Summary of Lease Payments (Details) Sheet http://www.riotinto.com/role/LeasesLeasesSummaryofLeasePaymentsDetails Leases Leases - Summary of Lease Payments (Details) Details 161 false false R162.htm 241114067 - Disclosure - Leases - Summary of capitalised finance leases (Detail) Sheet http://www.riotinto.com/role/LeasesSummaryofcapitalisedfinanceleasesDetail Leases - Summary of capitalised finance leases (Detail) Details 162 false false R163.htm 241124068 - Disclosure - Leases - Narrative (Detail) Sheet http://www.riotinto.com/role/LeasesNarrativeDetail Leases - Narrative (Detail) Details 163 false false R164.htm 241154069 - Disclosure - Consolidated net cash/(debt) - Analysis of changes in consolidated net cash/(debt) (Detail) Sheet http://www.riotinto.com/role/ConsolidatednetcashdebtAnalysisofchangesinconsolidatednetcashdebtDetail Consolidated net cash/(debt) - Analysis of changes in consolidated net cash/(debt) (Detail) Details 164 false false R165.htm 241164070 - Disclosure - Consolidated net cash/(debt) - Analysis of changes in consolidated net cash/(debt) (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/ConsolidatednetcashdebtAnalysisofchangesinconsolidatednetcashdebtParentheticalDetail Consolidated net cash/(debt) - Analysis of changes in consolidated net cash/(debt) (Parenthetical) (Detail) Details 165 false false R166.htm 241194071 - Disclosure - Trade and other payables - Summary of Trade and other payables (Detail) Sheet http://www.riotinto.com/role/TradeandotherpayablesSummaryofTradeandotherpayablesDetail Trade and other payables - Summary of Trade and other payables (Detail) Details 166 false false R167.htm 241204072 - Disclosure - Trade and other payables - Summary of Trade and other payables (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/TradeandotherpayablesSummaryofTradeandotherpayablesParentheticalDetail Trade and other payables - Summary of Trade and other payables (Parenthetical) (Detail) Details 167 false false R168.htm 241234073 - Disclosure - Provisions, including post-retirement benefits - Summary of Provisions, including post-retirement benefits (Detail) Sheet http://www.riotinto.com/role/ProvisionsincludingpostretirementbenefitsSummaryofProvisionsincludingpostretirementbenefitsDetail Provisions, including post-retirement benefits - Summary of Provisions, including post-retirement benefits (Detail) Details 168 false false R169.htm 241244074 - Disclosure - Provisions (including post-retirement benefits) - Undiscounted Close-Down and Environmental Restoration Obligation (Details) Sheet http://www.riotinto.com/role/ProvisionsincludingpostretirementbenefitsUndiscountedCloseDownandEnvironmentalRestorationObligationDetails Provisions (including post-retirement benefits) - Undiscounted Close-Down and Environmental Restoration Obligation (Details) Details http://www.riotinto.com/role/ProvisionsincludingpostretirementbenefitsTables 169 false false R170.htm 241254075 - Disclosure - Provisions, including post-retirement benefits - Summary of Provisions, including post-retirement benefits (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/ProvisionsincludingpostretirementbenefitsSummaryofProvisionsincludingpostretirementbenefitsParentheticalDetail Provisions, including post-retirement benefits - Summary of Provisions, including post-retirement benefits (Parenthetical) (Detail) Details 170 false false R171.htm 241284076 - Disclosure - Share capital - Rio Tinto plc - Summary of share capital (Detail) Sheet http://www.riotinto.com/role/SharecapitalRioTintoplcSummaryofsharecapitalDetail Share capital - Rio Tinto plc - Summary of share capital (Detail) Details 171 false false R172.htm 241294077 - Disclosure - Share capital - Rio Tinto plc - Summary of share capital (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/SharecapitalRioTintoplcSummaryofsharecapitalParentheticalDetail Share capital - Rio Tinto plc - Summary of share capital (Parenthetical) (Detail) Details 172 false false R173.htm 241304078 - Disclosure - Share capital - Rio Tinto plc - Additional information (Detail) Sheet http://www.riotinto.com/role/SharecapitalRioTintoplcAdditionalinformationDetail Share capital - Rio Tinto plc - Additional information (Detail) Details 173 false false R174.htm 241334079 - Disclosure - Share capital - Rio Tinto Limited - Summary of share capital (Detail) Sheet http://www.riotinto.com/role/SharecapitalRioTintoLimitedSummaryofsharecapitalDetail Share capital - Rio Tinto Limited - Summary of share capital (Detail) Details 174 false false R175.htm 241344080 - Disclosure - Share capital - Rio Tinto Limited - Summary of share capital (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/SharecapitalRioTintoLimitedSummaryofsharecapitalParentheticalDetail Share capital - Rio Tinto Limited - Summary of share capital (Parenthetical) (Detail) Details 175 false false R176.htm 241354081 - Disclosure - Share capital - Rio Tinto Limited - Additional Information (Detail) Sheet http://www.riotinto.com/role/SharecapitalRioTintoLimitedAdditionalInformationDetail Share capital - Rio Tinto Limited - Additional Information (Detail) Details 176 false false R177.htm 241384082 - Disclosure - Other reserves and retained earnings - Summary of other reserves and retained earnings (Detail) Sheet http://www.riotinto.com/role/OtherreservesandretainedearningsSummaryofotherreservesandretainedearningsDetail Other reserves and retained earnings - Summary of other reserves and retained earnings (Detail) Details 177 false false R178.htm 241394083 - Disclosure - Other reserves and retained earnings - Summary of other reserves and retained earnings (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/OtherreservesandretainedearningsSummaryofotherreservesandretainedearningsParentheticalDetail Other reserves and retained earnings - Summary of other reserves and retained earnings (Parenthetical) (Detail) Details 178 false false R179.htm 241424084 - Disclosure - Financial instruments and risk management - Summary of financial assets and liabilities by categories (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryoffinancialassetsandliabilitiesbycategoriesDetail Financial instruments and risk management - Summary of financial assets and liabilities by categories (Detail) Details 179 false false R180.htm 241434085 - Disclosure - Financial instruments and risk management - Capital and liquidity risk - Additional information (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementCapitalandliquidityriskAdditionalinformationDetail Financial instruments and risk management - Capital and liquidity risk - Additional information (Detail) Details 180 false false R181.htm 241444086 - Disclosure - Financial instruments and risk management - Summary of capital and liquidity risk management (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofcapitalandliquidityriskmanagementDetail Financial instruments and risk management - Summary of capital and liquidity risk management (Detail) Details 181 false false R182.htm 241454087 - Disclosure - Financial instruments and risk management - Maturity analysis for non-derivative financial liabilities and derivative financial liabilities (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementMaturityanalysisfornonderivativefinancialliabilitiesandderivativefinancialliabilitiesDetail Financial instruments and risk management - Maturity analysis for non-derivative financial liabilities and derivative financial liabilities (Detail) Details 182 false false R183.htm 241464088 - Disclosure - Financial instruments and risk management - Commodity price risk - Additional information (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementCommoditypriceriskAdditionalinformationDetail Financial instruments and risk management - Commodity price risk - Additional information (Detail) Details 183 false false R184.htm 241474089 - Disclosure - Financial instruments and risk management - Summary of notional aluminium forward sales contracts embedded in power contracts (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofnotionalaluminiumforwardsalescontractsembeddedinpowercontractsDetail Financial instruments and risk management - Summary of notional aluminium forward sales contracts embedded in power contracts (Detail) Details 184 false false R185.htm 241484090 - Disclosure - Financial instruments and risk management - Summary of impact of hedging instrument on statement of financial position (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofimpactofhedginginstrumentonstatementoffinancialpositionDetail Financial instruments and risk management - Summary of impact of hedging instrument on statement of financial position (Detail) Details 185 false false R186.htm 241494091 - Disclosure - Financial instruments and risk management - Summary of changes in market price relevant to alumina purchase price swaps outstanding (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofchangesinmarketpricerelevanttoaluminapurchasepriceswapsoutstandingDetail Financial instruments and risk management - Summary of changes in market price relevant to alumina purchase price swaps outstanding (Detail) Details 186 false false R187.htm 241504092 - Disclosure - Financial instruments and risk management Financial instruments and risk management - Summary of credit risk (Details) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementFinancialinstrumentsandriskmanagementSummaryofcreditriskDetails Financial instruments and risk management Financial instruments and risk management - Summary of credit risk (Details) Details 187 false false R188.htm 241514093 - Disclosure - Financial instruments and risk management - Summary by currency, Group's net debt, after taking into account relevant cross currency interest rate swaps and foreign exchange contracts (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummarybycurrencyGroupsnetdebtaftertakingintoaccountrelevantcrosscurrencyinterestrateswapsandforeignexchangecontractsDetail Financial instruments and risk management - Summary by currency, Group's net debt, after taking into account relevant cross currency interest rate swaps and foreign exchange contracts (Detail) Details 188 false false R189.htm 241524094 - Disclosure - Financial instruments and risk management - Foreign exchange risk - Additional information (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementForeignexchangeriskAdditionalinformationDetail Financial instruments and risk management - Foreign exchange risk - Additional information (Detail) Details 189 false false R190.htm 241534095 - Disclosure - Financial instruments and risk management - Gains or Losses Associated with Ten Percent Strengthening of US Dollar (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementGainsorLossesAssociatedwithTenPercentStrengtheningofUSDollarDetail Financial instruments and risk management - Gains or Losses Associated with Ten Percent Strengthening of US Dollar (Detail) Details 190 false false R191.htm 241544096 - Disclosure - Financial instruments and risk management - Interest rate risk - Additional information (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementInterestrateriskAdditionalinformationDetail Financial instruments and risk management - Interest rate risk - Additional information (Detail) Details 191 false false R192.htm 241554097 - Disclosure - Financial instruments and risk management - Summary of Nominal Amount of Bond (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofNominalAmountofBondDetail Financial instruments and risk management - Summary of Nominal Amount of Bond (Detail) Details 192 false false R193.htm 241564098 - Disclosure - Financial instruments and risk management - Summary of borrowings in a hedge relationship (Details) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofborrowingsinahedgerelationshipDetails Financial instruments and risk management - Summary of borrowings in a hedge relationship (Details) Details 193 false false R194.htm 241574099 - Disclosure - Financial instruments and risk management - Summary of derivative financial instruments (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofderivativefinancialinstrumentsDetail Financial instruments and risk management - Summary of derivative financial instruments (Detail) Details 194 false false R195.htm 241584100 - Disclosure - Financial instruments and risk management - Summary of fair value of financial instruments (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryoffairvalueoffinancialinstrumentsDetail Financial instruments and risk management - Summary of fair value of financial instruments (Detail) Details 195 false false R196.htm 241594101 - Disclosure - Financial instruments and risk management - Fair Values Additional Information (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementFairValuesAdditionalInformationDetail Financial instruments and risk management - Fair Values Additional Information (Detail) Details 196 false false R197.htm 241604102 - Disclosure - Financial instruments and risk management - Summary of financial instruments carried at fair value (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryoffinancialinstrumentscarriedatfairvalueDetail Financial instruments and risk management - Summary of financial instruments carried at fair value (Detail) Details 197 false false R198.htm 241614103 - Disclosure - Financial instruments and risk management - Summary of changes in fair value of Level 3 financial assets and financial liabilities (Detail) Sheet http://www.riotinto.com/role/FinancialinstrumentsandriskmanagementSummaryofchangesinfairvalueofLevel3financialassetsandfinancialliabilitiesDetail Financial instruments and risk management - Summary of changes in fair value of Level 3 financial assets and financial liabilities (Detail) Details 198 false false R199.htm 241644104 - Disclosure - Contingencies and commitments - Summary of capital commitments (Detail) Sheet http://www.riotinto.com/role/ContingenciesandcommitmentsSummaryofcapitalcommitmentsDetail Contingencies and commitments - Summary of capital commitments (Detail) Details 199 false false R200.htm 241654105 - Disclosure - Contingencies and commitments - Additional information (Detail) Sheet http://www.riotinto.com/role/ContingenciesandcommitmentsAdditionalinformationDetail Contingencies and commitments - Additional information (Detail) Details 200 false false R201.htm 241664106 - Disclosure - Contingencies and commitments - Summary of aggregate amount of future payment commitments under purchase obligations outstanding (Detail) Sheet http://www.riotinto.com/role/ContingenciesandcommitmentsSummaryofaggregateamountoffuturepaymentcommitmentsunderpurchaseobligationsoutstandingDetail Contingencies and commitments - Summary of aggregate amount of future payment commitments under purchase obligations outstanding (Detail) Details 201 false false R202.htm 241674107 - Disclosure - Contingencies and commitments - Summary of subsidiaries and joint operations contingent liabilities (Detail) Sheet http://www.riotinto.com/role/ContingenciesandcommitmentsSummaryofsubsidiariesandjointoperationscontingentliabilitiesDetail Contingencies and commitments - Summary of subsidiaries and joint operations contingent liabilities (Detail) Details 202 false false R203.htm 241704108 - Disclosure - Average number of employees - Summary of average number of employees (Detail) Sheet http://www.riotinto.com/role/AveragenumberofemployeesSummaryofaveragenumberofemployeesDetail Average number of employees - Summary of average number of employees (Detail) Details 203 false false R204.htm 241734109 - Disclosure - Principal subsidiaries Principal subsidiaries - Principal in subsidiaries (Detail) Sheet http://www.riotinto.com/role/PrincipalsubsidiariesPrincipalsubsidiariesPrincipalinsubsidiariesDetail Principal subsidiaries Principal subsidiaries - Principal in subsidiaries (Detail) Details 204 false false R205.htm 241744110 - Disclosure - Principal subsidiaries - Subsidiaries financial information (Detail) Sheet http://www.riotinto.com/role/PrincipalsubsidiariesSubsidiariesfinancialinformationDetail Principal subsidiaries - Subsidiaries financial information (Detail) Details 205 false false R206.htm 241774111 - Disclosure - Principal joint operations - Summary of principle joint operations (Detail) Sheet http://www.riotinto.com/role/PrincipaljointoperationsSummaryofprinciplejointoperationsDetail Principal joint operations - Summary of principle joint operations (Detail) Details 206 false false R207.htm 241784112 - Disclosure - Principal joint operations - Summary of principle joint operations (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/PrincipaljointoperationsSummaryofprinciplejointoperationsParentheticalDetail Principal joint operations - Summary of principle joint operations (Parenthetical) (Detail) Details 207 false false R208.htm 241814113 - Disclosure - Principal joint ventures - Summary of joint ventures (Detail) Sheet http://www.riotinto.com/role/PrincipaljointventuresSummaryofjointventuresDetail Principal joint ventures - Summary of joint ventures (Detail) Details 208 false false R209.htm 241824114 - Disclosure - Principal joint ventures - Summary of joint ventures (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/PrincipaljointventuresSummaryofjointventuresParentheticalDetail Principal joint ventures - Summary of joint ventures (Parenthetical) (Detail) Details 209 false false R210.htm 241834115 - Disclosure - Principal joint ventures - Summary financial information for joint ventures by fair value (Detail) Sheet http://www.riotinto.com/role/PrincipaljointventuresSummaryfinancialinformationforjointventuresbyfairvalueDetail Principal joint ventures - Summary financial information for joint ventures by fair value (Detail) Details 210 false false R211.htm 241844116 - Disclosure - Principal joint ventures - Reconciliation of financial information for joint ventures by carrying value (Detail) Sheet http://www.riotinto.com/role/PrincipaljointventuresReconciliationoffinancialinformationforjointventuresbycarryingvalueDetail Principal joint ventures - Reconciliation of financial information for joint ventures by carrying value (Detail) Details 211 false false R212.htm 241854117 - Disclosure - Principal joint ventures - Reconciliation of financial information for joint ventures by carrying value (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/PrincipaljointventuresReconciliationoffinancialinformationforjointventuresbycarryingvalueParentheticalDetail Principal joint ventures - Reconciliation of financial information for joint ventures by carrying value (Parenthetical) (Detail) Details 212 false false R213.htm 241884118 - Disclosure - Principal associates - Summary of principal associates (Detail) Sheet http://www.riotinto.com/role/PrincipalassociatesSummaryofprincipalassociatesDetail Principal associates - Summary of principal associates (Detail) Details 213 false false R214.htm 241894119 - Disclosure - Principal associates - Summary of principal associates (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/PrincipalassociatesSummaryofprincipalassociatesParentheticalDetail Principal associates - Summary of principal associates (Parenthetical) (Detail) Details 214 false false R215.htm 241904120 - Disclosure - Principal associates - Additional information (Detail) Sheet http://www.riotinto.com/role/PrincipalassociatesAdditionalinformationDetail Principal associates - Additional information (Detail) Details 215 false false R216.htm 241914121 - Disclosure - Principal associates - Reconciliation of financial information for principal associates by carrying value (Detail) Sheet http://www.riotinto.com/role/PrincipalassociatesReconciliationoffinancialinformationforprincipalassociatesbycarryingvalueDetail Principal associates - Reconciliation of financial information for principal associates by carrying value (Detail) Details 216 false false R217.htm 241924122 - Disclosure - Principal associates - Summary information for joint ventures and associates that are not individually material to the group (Detail) Sheet http://www.riotinto.com/role/PrincipalassociatesSummaryinformationforjointventuresandassociatesthatarenotindividuallymaterialtothegroupDetail Principal associates - Summary information for joint ventures and associates that are not individually material to the group (Detail) Details 217 false false R218.htm 241944123 - Disclosure - Purchases and sales of subsidiaries, joint ventures, associates and other interests in businesses - Additional information (Detail) Sheet http://www.riotinto.com/role/PurchasesandsalesofsubsidiariesjointventuresassociatesandotherinterestsinbusinessesAdditionalinformationDetail Purchases and sales of subsidiaries, joint ventures, associates and other interests in businesses - Additional information (Detail) Details 218 false false R219.htm 241974124 - Disclosure - Directors' and key management remuneration - Summary of aggregate remuneration calculated in accordance with UK companies act 2006 (Detail) Sheet http://www.riotinto.com/role/DirectorsandkeymanagementremunerationSummaryofaggregateremunerationcalculatedinaccordancewithUKcompaniesact2006Detail Directors' and key management remuneration - Summary of aggregate remuneration calculated in accordance with UK companies act 2006 (Detail) Details 219 false false R220.htm 241984125 - Disclosure - Directors' and key management remuneration - Additional information (Detail) Sheet http://www.riotinto.com/role/DirectorsandkeymanagementremunerationAdditionalinformationDetail Directors' and key management remuneration - Additional information (Detail) Details 220 false false R221.htm 241994126 - Disclosure - Directors' and key management remuneration - Summary of aggregate compensation representing the expense recognised under IFRS (Detail) Sheet http://www.riotinto.com/role/DirectorsandkeymanagementremunerationSummaryofaggregatecompensationrepresentingtheexpenserecognisedunderIFRSDetail Directors' and key management remuneration - Summary of aggregate compensation representing the expense recognised under IFRS (Detail) Details 221 false false R222.htm 242024127 - Disclosure - Auditors' remuneration - Auditors' remuneration (Detail) Sheet http://www.riotinto.com/role/AuditorsremunerationAuditorsremunerationDetail Auditors' remuneration - Auditors' remuneration (Detail) Details 222 false false R223.htm 242054128 - Disclosure - Related-party transactions - Summary of transactions and balances with equity accounted units (Detail) Sheet http://www.riotinto.com/role/RelatedpartytransactionsSummaryoftransactionsandbalanceswithequityaccountedunitsDetail Related-party transactions - Summary of transactions and balances with equity accounted units (Detail) Details 223 false false R224.htm 242084129 - Disclosure - Exchange rates in US$ - Summary of principal exchange rate used in preparation of financial statements (Detail) Sheet http://www.riotinto.com/role/ExchangeratesinUSSummaryofprincipalexchangerateusedinpreparationoffinancialstatementsDetail Exchange rates in US$ - Summary of principal exchange rate used in preparation of financial statements (Detail) Details 224 false false R225.htm 242114130 - Disclosure - Share-based payments - Charge has been recognised in income statement for Rio Tinto's share-based incentive plans, and the related liability (for cash-settled plans) (Detail) Sheet http://www.riotinto.com/role/SharebasedpaymentsChargehasbeenrecognisedinincomestatementforRioTintossharebasedincentiveplansandtherelatedliabilityforcashsettledplansDetail Share-based payments - Charge has been recognised in income statement for Rio Tinto's share-based incentive plans, and the related liability (for cash-settled plans) (Detail) Details 225 false false R226.htm 242124131 - Disclosure - Share-based payments - Additional information (Detail) Sheet http://www.riotinto.com/role/SharebasedpaymentsAdditionalinformationDetail Share-based payments - Additional information (Detail) Details 226 false false R227.htm 242134132 - Disclosure - Share-based payments - Summary of performance share plans (Detail) Sheet http://www.riotinto.com/role/SharebasedpaymentsSummaryofperformanceshareplansDetail Share-based payments - Summary of performance share plans (Detail) Details 227 false false R228.htm 242144133 - Disclosure - Share-based payments - Management Share Plans, Bonus Deferral Plans, Global Employee Share Plans and UK Share Plan (combined) (Detail) Sheet http://www.riotinto.com/role/SharebasedpaymentsManagementSharePlansBonusDeferralPlansGlobalEmployeeSharePlansandUKSharePlancombinedDetail Share-based payments - Management Share Plans, Bonus Deferral Plans, Global Employee Share Plans and UK Share Plan (combined) (Detail) Details 228 false false R229.htm 242174134 - Disclosure - Post-retirement benefits - Summary of fair value of plan assets (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryoffairvalueofplanassetsDetail Post-retirement benefits - Summary of fair value of plan assets (Detail) Details 229 false false R230.htm 242184135 - Disclosure - Post-retirement benefits - Additional information (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsAdditionalinformationDetail Post-retirement benefits - Additional information (Detail) Details 230 false false R231.htm 242194136 - Disclosure - Post-retirement benefits - Summary of maturity of defined benefit obligations (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryofmaturityofdefinedbenefitobligationsDetail Post-retirement benefits - Summary of maturity of defined benefit obligations (Detail) Details 231 false false R232.htm 242204137 - Disclosure - Post-retirement benefits - Summary of geographical distribution of defined benefit obligations (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryofgeographicaldistributionofdefinedbenefitobligationsDetail Post-retirement benefits - Summary of geographical distribution of defined benefit obligations (Detail) Details 232 false false R233.htm 242214138 - Disclosure - Post-retirement benefits - Summary of total expense recognised in the income statement (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryoftotalexpenserecognisedintheincomestatementDetail Post-retirement benefits - Summary of total expense recognised in the income statement (Detail) Details 233 false false R234.htm 242224139 - Disclosure - Post-retirement benefits - Summary of total amount recognised in other comprehensive income before tax (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryoftotalamountrecognisedinothercomprehensiveincomebeforetaxDetail Post-retirement benefits - Summary of total amount recognised in other comprehensive income before tax (Detail) Details 234 false false R235.htm 242234140 - Disclosure - Post-retirement benefits - Summary of amount recognised in balance sheet (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryofamountrecognisedinbalancesheetDetail Post-retirement benefits - Summary of amount recognised in balance sheet (Detail) Details 235 false false R236.htm 242244141 - Disclosure - Post-retirement benefits - Summary of funding policy and contributions to plans (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryoffundingpolicyandcontributionstoplansDetail Post-retirement benefits - Summary of funding policy and contributions to plans (Detail) Details 236 false false R237.htm 242254142 - Disclosure - Post-retirement benefits - Summary of movement in net defined benefit liability (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryofmovementinnetdefinedbenefitliabilityDetail Post-retirement benefits - Summary of movement in net defined benefit liability (Detail) Details 237 false false R238.htm 242264143 - Disclosure - Post-retirement benefits - Summary of movement in present value of obligation (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryofmovementinpresentvalueofobligationDetail Post-retirement benefits - Summary of movement in present value of obligation (Detail) Details 238 false false R239.htm 242274144 - Disclosure - Post-retirement benefits - Summary of movement in plan assets (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryofmovementinplanassetsDetail Post-retirement benefits - Summary of movement in plan assets (Detail) Details 239 false false R240.htm 242284145 - Disclosure - Post-retirement benefits - Summary of main assumptions rate for valuations of plans (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsSummaryofmainassumptionsrateforvaluationsofplansDetail Post-retirement benefits - Summary of main assumptions rate for valuations of plans (Detail) Details 240 false false R241.htm 242294146 - Disclosure - Post-retirement benefits - Results summary of sensitivity analysis (Detail) Sheet http://www.riotinto.com/role/PostretirementbenefitsResultssummaryofsensitivityanalysisDetail Post-retirement benefits - Results summary of sensitivity analysis (Detail) Details 241 false false R242.htm 242314147 - Disclosure - Events after the balance sheet date (Details) Sheet http://www.riotinto.com/role/EventsafterthebalancesheetdateDetails Events after the balance sheet date (Details) Details http://www.riotinto.com/role/Eventsafterthebalancesheetdate 242 false false R243.htm 242344148 - Disclosure - Rio Tinto financial information by business unit - Schedule of financial information by business unit (Detail) Sheet http://www.riotinto.com/role/RioTintofinancialinformationbybusinessunitScheduleoffinancialinformationbybusinessunitDetail Rio Tinto financial information by business unit - Schedule of financial information by business unit (Detail) Details 243 false false R244.htm 242354149 - Disclosure - Rio Tinto financial information by business unit Rio Tinto financial information by business unit - Schedule of financial information by business unit (Parenthetical) (Detail) Sheet http://www.riotinto.com/role/RioTintofinancialinformationbybusinessunitRioTintofinancialinformationbybusinessunitScheduleoffinancialinformationbybusinessunitParentheticalDetail Rio Tinto financial information by business unit Rio Tinto financial information by business unit - Schedule of financial information by business unit (Parenthetical) (Detail) Details 244 false false All Reports Book All Reports rio-20201231.htm rio-20201231.xsd rio-20201231_cal.xml rio-20201231_def.xml rio-20201231_lab.xml rio-20201231_pre.xml rio-20201231_g1.jpg rio-20201231_g10.jpg rio-20201231_g100.jpg rio-20201231_g101.jpg rio-20201231_g102.jpg rio-20201231_g103.jpg rio-20201231_g104.jpg rio-20201231_g105.jpg rio-20201231_g106.jpg rio-20201231_g107.jpg rio-20201231_g108.jpg rio-20201231_g109.jpg rio-20201231_g11.jpg rio-20201231_g110.jpg rio-20201231_g111.jpg rio-20201231_g112.jpg rio-20201231_g113.jpg rio-20201231_g114.jpg rio-20201231_g115.jpg rio-20201231_g116.jpg rio-20201231_g117.jpg rio-20201231_g118.jpg rio-20201231_g119.jpg rio-20201231_g12.jpg rio-20201231_g120.jpg rio-20201231_g121.jpg rio-20201231_g122.jpg rio-20201231_g123.jpg rio-20201231_g124.jpg rio-20201231_g125.jpg rio-20201231_g126.jpg rio-20201231_g127.jpg rio-20201231_g128.jpg rio-20201231_g129.jpg rio-20201231_g13.jpg rio-20201231_g130.jpg rio-20201231_g131.jpg rio-20201231_g132.jpg rio-20201231_g133.jpg rio-20201231_g134.jpg rio-20201231_g135.jpg rio-20201231_g136.jpg rio-20201231_g137.jpg rio-20201231_g138.jpg rio-20201231_g139.jpg rio-20201231_g14.jpg rio-20201231_g140.jpg rio-20201231_g141.jpg rio-20201231_g142.jpg rio-20201231_g143.jpg rio-20201231_g144.jpg rio-20201231_g145.jpg rio-20201231_g146.jpg rio-20201231_g147.jpg rio-20201231_g148.jpg rio-20201231_g149.jpg rio-20201231_g15.jpg rio-20201231_g150.jpg rio-20201231_g151.jpg rio-20201231_g152.jpg rio-20201231_g153.jpg rio-20201231_g154.jpg rio-20201231_g155.jpg rio-20201231_g156.jpg rio-20201231_g157.jpg rio-20201231_g158.jpg rio-20201231_g159.jpg rio-20201231_g16.jpg rio-20201231_g160.jpg rio-20201231_g161.jpg rio-20201231_g162.jpg rio-20201231_g163.jpg rio-20201231_g164.jpg rio-20201231_g165.jpg rio-20201231_g166.jpg rio-20201231_g167.jpg rio-20201231_g168.jpg rio-20201231_g169.jpg rio-20201231_g17.jpg rio-20201231_g170.jpg rio-20201231_g171.jpg rio-20201231_g172.jpg rio-20201231_g173.jpg rio-20201231_g174.jpg rio-20201231_g175.jpg rio-20201231_g176.jpg rio-20201231_g177.jpg rio-20201231_g178.jpg rio-20201231_g179.jpg rio-20201231_g18.jpg rio-20201231_g180.jpg rio-20201231_g181.jpg rio-20201231_g182.jpg rio-20201231_g183.jpg rio-20201231_g184.jpg rio-20201231_g185.jpg rio-20201231_g186.jpg rio-20201231_g187.jpg rio-20201231_g188.jpg rio-20201231_g189.jpg rio-20201231_g19.jpg rio-20201231_g190.jpg rio-20201231_g191.jpg rio-20201231_g192.jpg rio-20201231_g193.jpg rio-20201231_g194.jpg rio-20201231_g195.jpg rio-20201231_g196.jpg rio-20201231_g197.jpg rio-20201231_g198.jpg rio-20201231_g199.jpg rio-20201231_g2.jpg rio-20201231_g20.jpg rio-20201231_g200.jpg rio-20201231_g201.jpg rio-20201231_g202.jpg rio-20201231_g203.jpg rio-20201231_g204.jpg rio-20201231_g205.jpg rio-20201231_g206.jpg rio-20201231_g207.jpg rio-20201231_g208.jpg rio-20201231_g209.jpg rio-20201231_g21.jpg rio-20201231_g210.jpg rio-20201231_g211.jpg rio-20201231_g212.jpg rio-20201231_g213.jpg rio-20201231_g214.jpg rio-20201231_g215.jpg rio-20201231_g216.jpg rio-20201231_g217.jpg rio-20201231_g218.jpg rio-20201231_g219.jpg rio-20201231_g22.jpg rio-20201231_g220.jpg rio-20201231_g221.jpg rio-20201231_g222.jpg rio-20201231_g223.jpg rio-20201231_g224.jpg rio-20201231_g225.jpg rio-20201231_g226.jpg rio-20201231_g227.jpg rio-20201231_g228.jpg rio-20201231_g229.jpg rio-20201231_g23.jpg rio-20201231_g230.jpg rio-20201231_g231.jpg rio-20201231_g232.jpg rio-20201231_g233.jpg rio-20201231_g234.jpg rio-20201231_g235.jpg rio-20201231_g236.jpg rio-20201231_g237.jpg rio-20201231_g238.jpg rio-20201231_g239.jpg rio-20201231_g24.jpg rio-20201231_g240.jpg rio-20201231_g241.jpg rio-20201231_g242.jpg rio-20201231_g243.jpg rio-20201231_g244.jpg rio-20201231_g245.jpg rio-20201231_g246.jpg rio-20201231_g247.jpg rio-20201231_g248.jpg rio-20201231_g249.jpg rio-20201231_g25.jpg rio-20201231_g250.jpg rio-20201231_g251.jpg rio-20201231_g252.jpg rio-20201231_g253.jpg rio-20201231_g254.jpg rio-20201231_g255.jpg rio-20201231_g256.jpg rio-20201231_g26.jpg rio-20201231_g27.jpg rio-20201231_g28.jpg rio-20201231_g29.jpg rio-20201231_g3.jpg rio-20201231_g30.jpg rio-20201231_g31.jpg rio-20201231_g32.jpg rio-20201231_g33.jpg rio-20201231_g34.jpg rio-20201231_g35.jpg rio-20201231_g36.jpg rio-20201231_g37.jpg rio-20201231_g38.jpg rio-20201231_g39.jpg rio-20201231_g4.jpg rio-20201231_g40.jpg rio-20201231_g41.jpg rio-20201231_g42.jpg rio-20201231_g43.jpg rio-20201231_g44.jpg rio-20201231_g45.jpg rio-20201231_g46.jpg rio-20201231_g47.jpg rio-20201231_g48.jpg rio-20201231_g49.jpg rio-20201231_g5.jpg rio-20201231_g50.jpg rio-20201231_g51.jpg rio-20201231_g52.jpg rio-20201231_g53.jpg rio-20201231_g54.jpg rio-20201231_g55.jpg rio-20201231_g56.jpg rio-20201231_g57.jpg rio-20201231_g58.jpg rio-20201231_g59.jpg rio-20201231_g6.jpg rio-20201231_g60.jpg rio-20201231_g61.jpg rio-20201231_g62.jpg rio-20201231_g63.jpg rio-20201231_g64.jpg rio-20201231_g65.jpg rio-20201231_g66.jpg rio-20201231_g67.jpg rio-20201231_g68.jpg rio-20201231_g69.jpg rio-20201231_g7.jpg rio-20201231_g70.jpg rio-20201231_g71.jpg rio-20201231_g72.jpg rio-20201231_g73.jpg rio-20201231_g74.jpg rio-20201231_g75.jpg rio-20201231_g76.jpg rio-20201231_g77.jpg rio-20201231_g78.jpg rio-20201231_g79.jpg rio-20201231_g8.jpg rio-20201231_g80.jpg rio-20201231_g81.jpg rio-20201231_g82.jpg rio-20201231_g83.jpg rio-20201231_g84.jpg rio-20201231_g85.jpg rio-20201231_g86.jpg rio-20201231_g87.jpg rio-20201231_g88.jpg rio-20201231_g89.jpg rio-20201231_g9.jpg rio-20201231_g90.jpg rio-20201231_g91.jpg rio-20201231_g92.jpg rio-20201231_g93.jpg rio-20201231_g94.jpg rio-20201231_g95.jpg rio-20201231_g96.jpg rio-20201231_g97.jpg rio-20201231_g98.jpg rio-20201231_g99.jpg http://xbrl.sec.gov/dei/2020-01-31 http://xbrl.sec.gov/currency/2020-01-31 http://xbrl.ifrs.org/taxonomy/2020-03-16/ifrs-full http://xbrl.sec.gov/country/2020-01-31 http://fasb.org/srt/2020-01-31 true true