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Post-Employment and Other Long-Term Employees Benefits - Components of Net Periodic Benefit Cost (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 36 $ 31 $ 27
Interest cost 21 21 24
Expected return on plan assets (24) (23) (22)
Amortization of actuarial net loss (gain) 12 12 10
Amortization of prior service cost 1 1 1
Effect of settlement   1 3
Net periodic benefit cost 46 43 43
Other Long-Term Benefit [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 13 11 5
Interest cost 1 1 1
Amortization of actuarial net loss (gain)   3 7
Net periodic benefit cost $ 14 $ 15 $ 13