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Goodwill - Reconciliation of Goodwill (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill beginning balance $ 113,010  
Goodwill ending balance 117,043 $ 113,010
Carrying amount 117,043 113,010
Acquisition cost [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill beginning balance 115,541 118,461
Effect of movements in foreign exchange 3,634 (3,147)
Disposal through business combinations 0 (32)
Transfers (to)/from other asset categories (179) (68)
Hyperinflation monetary adjustments 306 328
Goodwill ending balance 119,302 115,541
Carrying amount 119,302 115,541
Impairment losses [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Goodwill beginning balance (2,531) (2,665)
Effect of movements in foreign exchange 293 134
Impairment losses (20)  
Goodwill ending balance (2,259) (2,531)
Carrying amount $ (2,259) $ (2,531)