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Stockholders' Equity - Summary of Reconciliation of Controlling Interest due to Different Currencies (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure Detail Of Reconciliation Of Controlling Interest Due To Different Currencies Line Items [Line Items]    
Common stock and additional paid-in capital $ 7,893 $ 10,424
Other equity reserves (2,453) (2,724)
Retained earnings 2,635 1,621
Total controlling interest 8,075 $ 9,321
Parent [member]    
Disclosure Detail Of Reconciliation Of Controlling Interest Due To Different Currencies Line Items [Line Items]    
Common stock and additional paid-in capital 5,403  
Other equity reserves 974  
Retained earnings 1,698  
Total controlling interest 8,075  
Consolidated One [member]    
Disclosure Detail Of Reconciliation Of Controlling Interest Due To Different Currencies Line Items [Line Items]    
Common stock and additional paid-in capital 7,893  
Other equity reserves (2,453)  
Retained earnings 2,635  
Total controlling interest $ 8,075