Quarterly report pursuant to Section 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, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Net Periodic Cost:        
Settlement and curtailment (gain) loss       $ (33)
Defined Benefit Pension Plan | U.S. Pension Benefits        
Net Periodic Cost:        
Service cost $ 293 $ 506 $ 879 1,518
Interest cost 627 488 1,881 1,463
Expected return on assets (742) (820) (2,225) (2,460)
Amortization of prior service cost 27 23 80 69
Settlement and curtailment (gain) loss     0 0
Net periodic benefit cost (income) 205 197 615 590
Defined Benefit Pension Plan | International Pension Benefits        
Net Periodic Cost:        
Service cost 11 17 33 52
Interest cost 16 11 49 34
Expected return on assets (21) (19) (63) (59)
Amortization of prior service cost 1 0 1 1
Settlement and curtailment (gain) loss     0 (33)
Net periodic benefit cost (income) 7 9 20 (5)
U.S. Postretirement Medical Benefits | U.S. Pension Benefits        
Net Periodic Cost:        
Service cost 5 7 15 22
Interest cost 29 21 87 62
Expected return on assets (3) (1) (9) (3)
Amortization of prior service cost 0 0 1 0
Settlement and curtailment (gain) loss     0 0
Net periodic benefit cost (income) $ 31 $ 27 $ 94 $ 81