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Goodwill - Summary of Carrying Amount of Goodwill Allocated to Different Cash-generating Units (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill $ 117,908 $ 110,479
United States [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 33,330 33,387
Rest of North America [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 1,959 1,864
Mexico [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 13,819 12,250
Colombia [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 16,277 13,821
Rest of Middle Americas [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 24,465 23,205
Brazil [Member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 3,323 2,953
Rest of South America [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 1,323 1,345
Europe [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 2,859 2,557
South Africa [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 9,796 8,584
Rest of Africa [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 4,626 4,547
China [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 3,073 2,948
Rest of Asia Pacific [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill 3,057 2,998
Global Export and Holding Companies [member]    
Disclosure Of Carrying Amount Of Goodwill [line items]    
Goodwill $ 0 $ 21