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Related Parties - Summary of Compensation to Directors and Executive Officers (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Key management personnel      
Short-term employee benefits $ 4 $ 2 $ 2
Post-employment benefits [1]
Share-based payment $ 172 $ 24 $ 6
[1] Amount less than $1 million