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Post-Employment and Other Long-Term Employees Benefits - Weighted Average Assumptions Used in Determination of Benefit Obligation and Plan Assets (Detail)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Benefit Obligation [Abstract]      
Discount rate 3.73% 4.18% 1.84%
Salary increase rate 2.17% 2.31% 2.27%
Net Periodic Benefit Cost [Abstract]      
Discount rate 4.18% 1.84% 1.45%
Salary increase rate 2.31% 2.27% 2.43%
Expected long-term rates of return on plan assets 2.66% 3.19% 3.44%