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Dividends - Summary of dividends paid (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of Dividends [Line Items]      
Dividends payable during the year $ 7,025 $ 6,466 $ 11,716
Net movement of unclaimed dividends in the year 0 4 11
Dividends paid during the year 7,025 6,470 11,727
– Rio Tinto plc | Final Dividends      
Disclosure of Dividends [Line Items]      
Previous year dividend payable 3,185 2,875 5,024
– Rio Tinto plc | Special Dividends      
Disclosure of Dividends [Line Items]      
Previous year dividend payable 0 0 747
– Rio Tinto plc | Interim Dividends      
Disclosure of Dividends [Line Items]      
Interim dividend payable 2,238 2,147 3,162
– Rio Tinto Limited | Final Dividends      
Disclosure of Dividends [Line Items]      
Previous year dividend payable 936 815 1,597
– Rio Tinto Limited | Special Dividends      
Disclosure of Dividends [Line Items]      
Previous year dividend payable 0 0 237
– Rio Tinto Limited | Interim Dividends      
Disclosure of Dividends [Line Items]      
Interim dividend payable $ 666 $ 629 $ 949