v3.26.1
Pension and Other Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Other Postretirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 11 $ 9 $ 21 $ 19
Interest cost 16 16 32 31
Expected return on plan assets (14) (13) (27) (26)
Amortization of unrecognized prior service credit (9) (10) (18) (20)
Net loss (gain) amortization (8) (10) (15) (20)
Termination benefits 0 0 1 0
Net periodic benefit cost (4) (8) (6) (16)
U.S. | Pension Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 98 90 195 180
Interest cost 145 141 290 282
Expected return on plan assets (207) (210) (414) (420)
Amortization of unrecognized prior service credit 0 0 0 0
Net loss (gain) amortization 27 13 54 25
Termination benefits 2 0 4 0
Net periodic benefit cost 65 34 129 67
International | Pension Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 49 60 98 114
Interest cost 79 75 160 146
Expected return on plan assets (158) (152) (319) (295)
Amortization of unrecognized prior service credit (4) (4) (7) (8)
Net loss (gain) amortization (1) 2 (2) 5
Termination benefits 0 0 14 0
Net periodic benefit cost $ (35) $ (19) $ (56) $ (38)