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Intangible Assets - Summary of Carrying Amount of Intangible Assets with Indefinite Useful Lives (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets $ 40,430 $ 41,527
Intangible assets with indefinite useful lives [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 38,320 39,395
Intangible assets with indefinite useful lives [member] | United States [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 22,129 22,172
Intangible assets with indefinite useful lives [member] | Rest of North America [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 42 42
Intangible assets with indefinite useful lives [member] | Mexico [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 2,977 3,067
Intangible assets with indefinite useful lives [member] | Colombia [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 2,870 3,320
Intangible assets with indefinite useful lives [member] | Rest of Middle Americas [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 3,432 3,655
Intangible assets with indefinite useful lives [member] | Brazil [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 0 1
Intangible assets with indefinite useful lives [member] | Rest of South America [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 724 681
Intangible assets with indefinite useful lives [member] | Europe [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 452 461
Intangible assets with indefinite useful lives [member] | South Africa [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 3,029 3,289
Intangible assets with indefinite useful lives [member] | Rest of Africa [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 1,112 1,068
Intangible assets with indefinite useful lives [member] | China [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets 440 427
Intangible assets with indefinite useful lives [member] | Rest of Asia Pacific [member]    
Disclosure of intangible assets with indefinite useful life [line items]    
Intangible assets $ 1,113 $ 1,212