Annual report [Section 13 and 15(d), not S-K Item 405]

COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost for Company Sponsored Pension and Postretirement Benefit Plans (Details)

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COMPANY-SPONSORED EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost for Company Sponsored Pension and Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Benefits | United States      
Net Periodic Benefit Cost:      
Service cost $ 1,124 $ 1,240 $ 1,172
Interest cost 2,718 2,574 2,508
Expected return on plan assets (3,130) (3,085) (2,967)
Amortization of prior service cost 156 152 106
Actuarial (gain) loss 0 673 393
Curtailment and settlement (gain) loss 0 0 0
Net periodic benefit cost 868 1,554 1,212
Pension Benefits | International Pension Benefits      
Net Periodic Benefit Cost:      
Service cost 37 42 43
Interest cost 65 66 66
Expected return on plan assets (82) (83) (84)
Amortization of prior service cost 1 1 1
Actuarial (gain) loss 0 (8) (42)
Curtailment and settlement (gain) loss 0 0 8
Net periodic benefit cost 21 18 (8)
Postemployment Retirement Benefits | United States      
Net Periodic Benefit Cost:      
Service cost 17 20 20
Interest cost 109 109 116
Expected return on plan assets (7) (4) (12)
Amortization of prior service cost 1 1 2
Actuarial (gain) loss 0 0 0
Curtailment and settlement (gain) loss 0 0 0
Net periodic benefit cost $ 120 $ 126 $ 126