v3.25.4
Post-Employment and Other Long-Term Employees Benefits - Changes in Benefit Obligation and Plan Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Change in plan assets:      
Plan assets at fair value at beginning of year $ 646    
Foreign currency translation   $ 0  
Plan assets at fair value at end of year 717 646  
Net amount recognized in the balance sheet consisted of the following:      
Post-employment benefit obligations 403 377  
Pension Benefits      
Change in benefit obligation:      
Benefit obligation at beginning of year 992 1,008  
Service cost 39 32 $ 28
Interest cost 38 36 35
Employee contributions 7 6  
Plan amendments 6 3  
Benefits paid (40) (39)  
Effect of settlement (5) (11)  
Actuarial (gain) loss (21) (5)  
Foreign currency translation 75 (38)  
Benefit obligation at end of year 1,091 992 1,008
Change in plan assets:      
Plan assets at fair value at beginning of year 646 654  
Actual return on plan assets 37 18  
Employer contributions 21 25  
Employee contributions 7 6  
Benefits paid (27) (25)  
Effect of settlement (1) (11)  
Foreign currency translation 34 (21)  
Plan assets at fair value at end of year 717 646 654
Funded status (374) (346)  
Net amount recognized in the balance sheet consisted of the following:      
Other investments and other non-current assets 20 22  
Other payables and accrued liabilities (19) (15)  
Other non-current liabilities 0 0  
Post-employment benefit obligations (375) (353)  
Net amount recorded (374) (346)  
Other Long-Term Benefits      
Change in benefit obligation:      
Benefit obligation at beginning of year 109 99  
Service cost 26 23 17
Interest cost 4 3 3
Employee contributions 0 0  
Plan amendments 0 0  
Benefits paid (15) (12)  
Effect of settlement 0 0  
Actuarial (gain) loss 3 1  
Foreign currency translation 15 (5)  
Benefit obligation at end of year 142 109 99
Change in plan assets:      
Plan assets at fair value at beginning of year 0 0  
Plan assets at fair value at end of year 0 0 $ 0
Funded status (142) (109)  
Net amount recognized in the balance sheet consisted of the following:      
Other investments and other non-current assets 0 0  
Other payables and accrued liabilities (4) (10)  
Other non-current liabilities (138) (99)  
Post-employment benefit obligations 0 0  
Net amount recorded (142) $ (109)  
Non‑qualified deferred compensation plan      
Net amount recognized in the balance sheet consisted of the following:      
Post-employment benefit obligations $ (28)