v3.25.4
Pension And Other Postretirement Benefits (Benefit Obligations And Plan Assets Associated With Principal Benefit Plans) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Other Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate (percent) 5.50% 5.80%  
Long-term rate of compensation increase (percent) 4.00% 4.00%  
Change in benefit obligation      
Benefit obligation at January 1 $ 4,791 $ 5,014  
Service cost 75 81 $ 78
Interest cost 262 250 276
Actuarial loss/(gain) 55 (81)  
Benefits paid (449) (534)  
Foreign exchange rate changes 20 (40)  
Amendments, divestments and other 138 101  
Benefit obligation at December 31 $ 4,892 $ 4,791 5,014
Pension Benefits - U.S. | Pension Plans, Defined Benefit      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate (percent) 5.50% 5.70%  
Long-term rate of compensation increase (percent) 4.00% 4.00%  
Change in benefit obligation      
Benefit obligation at January 1 $ 12,999 $ 13,143  
Service cost 517 499 466
Interest cost 677 671 664
Actuarial loss/(gain) 218 (441)  
Benefits paid (1,104) (874)  
Amendments, divestments and other (795) 1  
Benefit obligation at December 31 12,512 12,999 13,143
Accumulated benefit obligation at December 31 $ 10,838 $ 11,227  
Pension Benefits - Non-U.S. | Pension Plans, Defined Benefit      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate (percent) 5.00% 4.60%  
Long-term rate of compensation increase (percent) 4.30% 4.20%  
Change in benefit obligation      
Benefit obligation at January 1 $ 19,198 $ 21,327  
Service cost 324 338 323
Interest cost 842 823 922
Actuarial loss/(gain) (1,231) (658)  
Benefits paid (1,273) (1,240)  
Foreign exchange rate changes 1,648 (1,274)  
Amendments, divestments and other (990) (118)  
Benefit obligation at December 31 18,518 19,198 $ 21,327
Accumulated benefit obligation at December 31 $ 17,210 $ 17,818