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Principal subsidiaries - Subsidiaries financial information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 16, 2022
Dec. 15, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of subsidiaries [line items]            
Consolidated sales revenue     $ 54,041 $ 55,554 [1] $ 63,495 [1]  
Profit/(loss) after tax     9,953 [2] 13,048 [1],[3] 22,597 [2],[3]  
Profit/(loss) after tax – attributable to non-controlling interests     (105) 656 [1] 1,482 [1]  
Profit/(loss) after tax – attributable to owners of Rio Tinto     10,058 12,392 [1] 21,115 [1]  
Other comprehensive income/(loss)     319 (1,897) [3] (1,292) [3]  
Total comprehensive income/(loss) [4]     10,272 11,151 [3] 21,305 [3]  
Non-current assets     82,039 77,801 [5]    
Current assets     21,510 18,973 [5]    
Non-current liabilities     (34,465) (32,430) [5]    
Net assets     56,341 52,741 [5]    
– attributable to non-controlling interests     1,755 2,107 [5]    
– attributable to Rio Tinto     54,586 50,634 [5]   $ 47,570
Cash flow from operations     15,160 16,134 25,345  
Dividends paid to non-controlling interests     (462) (421) (1,090)  
Goodwill     797 826 [5] $ 879  
Oyu Tolgoi LLC            
Disclosure of subsidiaries [line items]            
Proportion of indirect ownership interest in subsidiary   34.00%        
Iron Ore Company of Canada            
Disclosure of subsidiaries [line items]            
Consolidated sales revenue     2,314 2,634    
Profit/(loss) after tax     445 756    
Profit/(loss) after tax – attributable to non-controlling interests     184 312    
Profit/(loss) after tax – attributable to owners of Rio Tinto     261 444    
Other comprehensive income/(loss)     60 (111)    
Total comprehensive income/(loss)     505 645    
Non-current assets     3,170 2,963    
Current assets     866 774    
Current liabilities     (519) (499)    
Non-current liabilities     (1,005) (973)    
Net assets     2,512 2,265    
– attributable to non-controlling interests     1,052 946    
– attributable to Rio Tinto     1,460 1,319    
Cash flow from operations     801 1,153    
Dividends paid to non-controlling interests     (103) (142)    
Oyu Tolgoi LLC            
Disclosure of subsidiaries [line items]            
Consolidated sales revenue     1,625 1,424    
Profit/(loss) after tax     (1,024) (224)    
Profit/(loss) after tax – attributable to non-controlling interests     (352) (159)    
Profit/(loss) after tax – attributable to owners of Rio Tinto     (672) (65)    
Other comprehensive income/(loss)     0 0    
Total comprehensive income/(loss)     (1,024) (224)    
Non-current assets     15,335 13,667    
Current assets     511 753    
Current liabilities     (4,920) (4,253)    
Non-current liabilities     (12,544) (10,731)    
Net assets     (1,618) (564)    
– attributable to non-controlling interests     (558) (207)    
– attributable to Rio Tinto     (1,060) (357)    
Cash flow from operations     345 406    
Dividends paid to non-controlling interests     0 0    
Group interest (voting %) 66.00%          
Turquoise Hill            
Disclosure of subsidiaries [line items]            
Percentage of voting equity interests acquired 49.00%          
Turquoise Hill Resources Ltd            
Disclosure of subsidiaries [line items]            
Group interest (voting %)   51.00%        
Turquoise Hill Resources Ltd | Oyu Tolgoi LLC            
Disclosure of subsidiaries [line items]            
Group interest (voting %)   66.00%        
Robe River Mining Co Pty Ltd            
Disclosure of subsidiaries [line items]            
Consolidated sales revenue     1,753 1,703    
Profit/(loss) after tax     848 814    
Profit/(loss) after tax – attributable to non-controlling interests     339 323    
Profit/(loss) after tax – attributable to owners of Rio Tinto     509 491    
Other comprehensive income/(loss)     40 (206)    
Total comprehensive income/(loss)     888 608    
Non-current assets     2,899 2,846    
Current assets     808 756    
Current liabilities     (157) (112)    
Non-current liabilities     (443) (410)    
Net assets     3,107 3,080    
– attributable to non-controlling interests     1,241 1,230    
– attributable to Rio Tinto     1,866 1,850    
Cash flow from operations     1,480 1,435    
Dividends paid to non-controlling interests     $ (345) (278)    
Group interest (voting %)     60.00%      
Other companies and eliminations            
Disclosure of subsidiaries [line items]            
Consolidated sales revenue     $ 2,045 1,987    
Profit/(loss) after tax     825 865    
Profit/(loss) after tax – attributable to non-controlling interests     0 0    
Profit/(loss) after tax – attributable to owners of Rio Tinto     825 865    
Other comprehensive income/(loss)     36 (112)    
Total comprehensive income/(loss)     861 753    
Non-current assets     4,026 3,975    
Current assets     711 609    
Current liabilities     (358) (2,724)    
Non-current liabilities     (2,554) (550)    
Net assets     1,825 1,310    
– attributable to non-controlling interests     0 0    
– attributable to Rio Tinto     1,825 1,310    
Cash flow from operations     1,640 1,981    
Dividends paid to non-controlling interests     0 0    
Robe River            
Disclosure of subsidiaries [line items]            
Consolidated sales revenue     3,798 3,690    
Profit/(loss) after tax     1,673 1,679    
Profit/(loss) after tax – attributable to non-controlling interests     339 323    
Profit/(loss) after tax – attributable to owners of Rio Tinto     1,334 1,356    
Other comprehensive income/(loss)     76 (318)    
Total comprehensive income/(loss)     1,749 1,361    
Non-current assets     6,925 6,821    
Current assets     1,519 1,365    
Current liabilities     (515) (2,836)    
Non-current liabilities     (2,997) (960)    
Net assets     4,932 4,390    
– attributable to non-controlling interests     1,241 1,230    
– attributable to Rio Tinto     3,691 3,160    
Cash flow from operations     3,120 3,416    
Dividends paid to non-controlling interests     (345) (278)    
North Mining Limited | Robe River            
Disclosure of subsidiaries [line items]            
Goodwill     $ 342 $ 337    
[1] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.
[2] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.
[3] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.
[4] Refer to the Group statement of comprehensive income for further details. Adjustments to other reserves include currency translation attributable to owners of Rio Tinto, other than that arising on
Rio Tinto Limited’s share capital.
[5] Comparative information has been restated to reflect the adoption of narrow-scope amendments to IAS 12. Refer to page 166 for details.