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Post-Employment and Other Long-Term Employees Benefits - Reconciliation for Plan Assets Measured at Fair Value Using Unobservable Inputs (Level 3) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Change in plan assets:    
Plan assets at fair value at beginning of year $ 565  
Foreign currency translation 0 $ 0
Plan assets at fair value at end of year 654 565
Significant Unobservable Inputs (Level 3)    
Change in plan assets:    
Plan assets at fair value at beginning of year 178 167
Contributions (employer and employee) 21 21
Actual return on plan assets 4  
Benefits paid 14 9
Effect of settlement (1) (14)
Foreign currency translation 17 (5)
Plan assets at fair value at end of year $ 233 $ 178