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Entities accounted under the equity method Principal joint ventures - Summary financial information for joint ventures by fair value (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Joint Ventures And Associates [Line Items]      
Revenue $ 53,658 $ 54,041 $ 55,554
Finance expense (763) (967) (335)
Income tax (4,041) (3,832) (5,614)
Profit after tax for the period 11,574 9,953 13,048
Other comprehensive income/(loss) (3,374) 319 (1,897)
Total comprehensive income [1] 8,200 10,272 $ 11,151
Non-current assets 83,666 82,039  
Current assets 19,120 21,510  
Current liabilities (11,743) (12,743)  
Non-current liabilities (33,078) (34,465)  
Net assets 57,965 56,341  
– cash and cash equivalents 8,495 9,673  
Minera Escondida Ltda      
Disclosure Of Joint Ventures And Associates [Line Items]      
Revenue 11,413 9,187  
Depreciation and amortisation (1,417) (1,183)  
Other operating costs (4,123) (3,784)  
Operating profit 5,873 4,220  
Finance expense (233) (283)  
Income tax (2,707) (1,773)  
Profit after tax for the period 2,933 2,164  
Other comprehensive income/(loss) 14 (13)  
Total comprehensive income 2,947 2,151  
Non-current assets 12,991 12,480  
Current assets 3,230 2,751  
Current liabilities (2,351) (1,607)  
Non-current liabilities (5,585) (5,192)  
Net assets 8,285 8,432  
– cash and cash equivalents 677 360  
– current financial liabilities (170) (677)  
– non-current financial liabilities (3,333) (2,770)  
Dividends received from joint venture (Rio Tinto share) $ 1,035 $ 578  
[1] Refer to the consolidated 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.