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Revenue by destination and product - Consolidated sales revenue by product (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of products and services [line items]      
Revenue from contracts with customers $ 54,202 $ 53,721 $ 56,074
Other revenue (544) 320 (520)
Consolidated sales revenue 53,658 54,041 55,554
Iron ore      
Disclosure of products and services [line items]      
Revenue from contracts with customers 31,334 33,383 33,068
Other revenue (530) 389 (267)
Consolidated sales revenue 30,804 33,772 32,801
Aluminium, alumina and bauxite      
Disclosure of products and services [line items]      
Revenue from contracts with customers 12,947 12,039 13,955
Other revenue 48 (63) (165)
Consolidated sales revenue 12,995 11,976 13,790
Copper - Rio Tinto Kennecott      
Disclosure of products and services [line items]      
Revenue from contracts with customers 4,791 3,219 3,276
Other revenue (63) (1) (80)
Consolidated sales revenue 4,728 3,218 3,196
Industrial minerals (comprising titanium dioxide slag, borates and salt)      
Disclosure of products and services [line items]      
Revenue from contracts with customers 2,678 2,806 2,685
Other revenue (3) (8) (16)
Consolidated sales revenue 2,675 2,798 2,669
Gold      
Disclosure of products and services [line items]      
Revenue from contracts with customers 788 470 564
Other revenue 9 6 9
Consolidated sales revenue 797 476 573
Diamonds      
Disclosure of products and services [line items]      
Revenue from contracts with customers 279 444 816
Other revenue 0 0 0
Consolidated sales revenue 279 444 816
Other products and freight services      
Disclosure of products and services [line items]      
Revenue from contracts with customers 1,385 1,360 1,710
Other revenue (5) (3) (1)
Consolidated sales revenue $ 1,380 $ 1,357 $ 1,709