Quarterly report [Sections 13 or 15(d)]

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

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EMPLOYEE BENEFIT PLANS - Net Periodic Benefit Cost for Pension and Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Defined Benefit Pension Plan | U.S. Pension Benefits        
Net Periodic Cost:        
Service cost $ 281 $ 309 $ 844 $ 929
Interest cost 679 644 2,038 1,932
Expected return on assets (787) (770) (2,342) (2,313)
Amortization of prior service cost 39 37 117 114
Net periodic benefit cost 212 220 657 662
Defined Benefit Pension Plan | International Pension Benefits        
Net Periodic Cost:        
Service cost 10 10 28 32
Interest cost 17 16 49 50
Expected return on assets (21) (22) (62) (64)
Amortization of prior service cost 0 1 1 1
Net periodic benefit cost 6 5 16 19
U.S. Postretirement Medical Benefits | U.S. Pension Benefits        
Net Periodic Cost:        
Service cost 5 5 13 15
Interest cost 28 27 82 81
Expected return on assets (2) (1) (5) (3)
Amortization of prior service cost 0 0 0 0
Net periodic benefit cost $ 31 $ 31 $ 90 $ 93