XML 35 R103.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Post-Employment and Other Long-Term Employees Benefits - Components of Net Periodic Benefit Cost (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 27 $ 27 $ 27
Interest cost 24 24 23
Expected return on plan assets (22) (23) (21)
Amortization of actuarial net loss (gain) 10 8 9
Amortization of prior service cost 1 1  
Effect of settlement 3   1
Effect of curtailment   1  
Net periodic benefit cost 43 38 39
Other Long-Term Benefit [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 5 6 3
Interest cost 1 1 2
Amortization of actuarial net loss (gain) 7 1 3
Net periodic benefit cost $ 13 $ 8 $ 8