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Label Element Value
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards $ 50,946,000,000
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 49,708,000,000
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards (169,000,000)
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards 115,000,000 [1]
Retained earnings [member]  
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 23,582,000,000
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 26,912,000,000
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards (179,000,000)
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards 113,000,000 [1]
Other reserves [member]  
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 12,294,000,000
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 8,661,000,000
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards 10,000,000
Issued capital [member]  
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 4,360,000,000
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 3,688,000,000
Non-controlling interests [member]  
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 6,404,000,000
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 6,135,000,000
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards 2,000,000 [1]
Share premium [member]  
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 4,306,000,000
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 4,312,000,000
Equity attributable to owners of parent [member]  
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 44,542,000,000
Restated Opening Equity Balance After Adjustment For New Accounting Standards rio_RestatedOpeningEquityBalanceAfterAdjustmentForNewAccountingStandards 43,573,000,000
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards (169,000,000)
Adjustment For Transition To New Accounting Standards rio_AdjustmentForTransitionToNewAccountingStandards $ 113,000,000 [1]
Subsidiaries And Joint Operations [Member]  
Percentage Of Employees Of Subsidiary Companies rio_PercentageOfEmployeesOfSubsidiaryCompanies 100.00%
[1] The impact of the transition to new accounting pronouncements; IFRS 16 “Leases” and IFRIC 23 "Uncertainty over income tax treatments" on 1 January 2019 is discussed in note 45.