v3.25.4
Pension and Postretirement Benefit Plans and Defined Contribution Plans - Schedule of Net Periodic Benefit Costs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Postretirement Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 17 $ 14 $ 12
Interest cost 25 23 21
Expected return on plan assets (57) (51) (44)
Amortization of prior service cost/(credit) (88) (113) (119)
Actuarial (gains)/losses [1] 18 144 51
Curtailments (70) 0 (12)
Special termination benefits 0 0 0
Net periodic benefit cost/(credit) reported in income (155) 18 (90)
Cost/(credit) reported in Other comprehensive income/(loss) 140 (80) 128
Cost/(credit) recognized in Comprehensive income (15) (62) 38
U.S. [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0 0 0
Interest cost 529 553 589
Expected return on plan assets (735) (832) (778)
Amortization of prior service cost/(credit) 0 1 2
Actuarial (gains)/losses [1] (59) 396 (410)
Curtailments 0 0 0
Special termination benefits 0 0 6
Net periodic benefit cost/(credit) reported in income (265) 117 (592)
Cost/(credit) reported in Other comprehensive income/(loss) 0 (1) (2)
Cost/(credit) recognized in Comprehensive income (265) 116 (594)
International [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 104 87 85
Interest cost 293 312 287
Expected return on plan assets (329) (322) (304)
Amortization of prior service cost/(credit) 4 4 0
Actuarial (gains)/losses [1] (201) 33 102
Curtailments (10) (4) (2)
Special termination benefits 2 10 0
Net periodic benefit cost/(credit) reported in income (137) 120 169
Cost/(credit) reported in Other comprehensive income/(loss) 12 (4) 31
Cost/(credit) recognized in Comprehensive income $ (126) $ 117 $ 199
[1] Reflects: (i) actuarial remeasurement net gains in 2025 primarily due to favorable asset performance for the U.S. pension plans and increases in discount rates for the international pension plans, partially offset by unfavorable asset performance for the international pension plans and decreases in discount rates for the U.S. and postretirement plans, (ii) actuarial remeasurement net losses in 2024, primarily due to unfavorable asset performance for the U.S. pension plans and decreases in discount rates for the international pension plans, partially offset by increases in discount rates for the U.S. pension plans and favorable asset performance for the international pension plans and postretirement plans, and (iii) actuarial remeasurement net gains in 2023, primarily due to favorable asset performance in the U.S. and increases in discount rates for the international plans, partially offset by unfavorable asset performance for certain international plans.