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About the presentation of our financial statements - Impact on equity attributable to owners due to amendments (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Jan. 01, 2023
Dec. 31, 2022
Jan. 01, 2022
Dec. 31, 2021
Jan. 01, 2021
Dec. 31, 2020
Other Disclosures [Line Items]              
Equity attributable to owners of Rio Tinto $ 54,586   $ 50,634 [1]       $ 47,570
Opening balance as previously reported              
Other Disclosures [Line Items]              
Equity attributable to owners of Rio Tinto   $ 50,175   $ 51,415   $ 47,054  
Impact of IAS 12 amendments              
Other Disclosures [Line Items]              
Equity attributable to owners of Rio Tinto     $ 459   $ 515   $ 516
Current Stated After Changes In Policy Required By IFRS              
Other Disclosures [Line Items]              
Equity attributable to owners of Rio Tinto         $ 51,930    
[1] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.