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Changes in Equity and Earnings per Share - Summary of Changes in Issued Capital and Treasury Shares (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of classes of share capital [line items]      
At the end of the previous year 2,019,000,000    
Changes during the period 0    
At the end of the current year 2,019,000,000 2,019,000,000  
At the end of the previous year $ 1,736    
Changes during the period 0    
At the end of the current year 1,736 $ 1,736  
Changes during the period $ (237) $ 95 $ 81
Ordinary shares [member]      
Disclosure of classes of share capital [line items]      
At the end of the current year 1,737,000,000    
Treasury shares [member]      
Disclosure of classes of share capital [line items]      
Restricted shares 282,044,710 282,050,690  
At the end of the previous year 35,500,000    
Changes during the period (100,000)    
At the end of the current year 35,400,000 35,500,000  
Result on the use of treasury shares [member]      
Disclosure of classes of share capital [line items]      
At the end of the previous year $ (4,559)    
Changes during the period (477)    
At the end of the current year (5,036) $ (4,559)  
Treasury shares [member]      
Disclosure of classes of share capital [line items]      
At the end of the previous year (3,706)    
Changes during the period 240 289 $ 917
At the end of the current year $ (3,465) $ (3,706)