v3.25.4
Post-Employment and Other Long-Term Employees Benefits - Rollforward Accumulated Other Comprehensive Income (Loss) Before Tax Effects (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Actuarial (gains)/losses    
Accumulated other comprehensive loss, actuarial (gains)/losses, beginning balance $ 67 $ 69
Net amount generated/arising in current year (27) 7
Amortization (9) (8)
Foreign currency translation adjustment   (1)
Accumulated other comprehensive loss, actuarial (gains)/losses, ending balance 31 67
Prior service cost    
Accumulated other comprehensive loss, prior service cost, beginning balance 2 (1)
Net amount generated/arising in current year 6 3
Amortization 0 0
Foreign currency translation adjustment   0
Accumulated other comprehensive loss, prior service cost, ending balance 8 2
Total    
Defined benefit plan, accumulated other comprehensive (income) loss, before tax 69 68
Net amount generated/arising in current year (21) 10
Amortization (9) (8)
Foreign currency translation adjustment   (1)
Defined benefit plan, accumulated other comprehensive (income) loss, before tax $ 39 $ 69