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Benefit Plans - Schedule of Change in Projected Benefit Obligation, Plan Assets and Funded Status (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Change in benefit obligation      
Interest cost $ 243 $ 239 $ 249
Remeasurement of benefit obligation (gains) losses 96 (129) 121
Pension benefits      
Change in benefit obligation      
Benefit obligation, beginning of year 4,441 4,584  
Service cost 107 80  
Interest cost 235 230 239
Participant contributions 0 0  
Remeasurement of benefit obligation (gains) losses 101 (125) 125
Benefits paid (449) (329)  
Translation adjustment and other 5 1  
Benefit obligation, end of year 4,440 4,441 4,584
Change in plan assets      
Fair value of plan assets, beginning of year 4,368 4,440  
Actual return on plan assets 445 214  
Employer contribution 44 45  
Benefits paid (449) (329)  
Translation adjustment and other 6 (2)  
Fair value of plan assets, end of year 4,414 4,368 4,440
Funded status (26) (73)  
Prior service credit 0    
Unamortized pension and other postretirement prior service credit 0 0  
Postretirement benefits      
Change in benefit obligation      
Benefit obligation, beginning of year 163 185  
Service cost 0 0  
Interest cost 8 9 10
Participant contributions 11 13  
Remeasurement of benefit obligation (gains) losses (5) (4) (4)
Benefits paid (32) (37)  
Translation adjustment and other 2 (3)  
Benefit obligation, end of year 147 163 $ 185
Change in plan assets      
Employer contribution 21 24  
Funded status (147) (163)  
Prior service credit (14)    
Unamortized pension and other postretirement prior service credit $ (14) $ (15)