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Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about intangible assets [line items]    
Carrying amount of intangible assets $ 40,430 $ 41,527
Impairment (176) (165)
Intangible Assets With Indefinite Useful Life [member]    
Disclosure of detailed information about intangible assets [line items]    
Carrying amount of intangible assets 38,320 39,395
Intangible Assets With Finite Useful Life [member]    
Disclosure of detailed information about intangible assets [line items]    
Carrying amount of intangible assets $ 2,110 $ 2,132