v3.25.3
POSTRETIREMENT BENEFIT PLANS - Components of Expense (Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items]        
Non-operating $ (75) $ (102) $ (222) $ (306)
Pension Plans | U.S. Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost – Operating 1 8 3 24
Interest cost 249 242 746 726
Expected return on plan assets (287) (299) (860) (896)
Amortization of net loss (gain) (20) (17) (60) (51)
Amortization of prior service cost (credit) (3) 2 (8) 6
Special termination cost 0 0 3 0
Non-operating (60) (72) (179) (215)
Net periodic expense (income) (59) (64) (176) (191)
Pension Plans | International Plans        
Defined Benefit Plan Disclosure [Line Items]        
Service cost – Operating 5 5 15 15
Interest cost 39 35 113 105
Expected return on plan assets (39) (49) (113) (145)
Amortization of net loss (gain) 5 3 16 9
Amortization of prior service cost (credit) (1) 0 (2) 0
Special termination cost 0 0 0 0
Non-operating 4 (11) 14 (31)
Net periodic expense (income) 10 (6) 29 (16)
Other Postretirement Benefits Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost – Operating 1 2 4 6
Interest cost 13 14 39 41
Expected return on plan assets 0 0 0 0
Amortization of net loss (gain) (15) (15) (44) (45)
Amortization of prior service cost (credit) (20) (22) (60) (66)
Special termination cost 0 0 1 0
Non-operating (21) (23) (64) (70)
Net periodic expense (income) $ (20) $ (21) $ (60) $ (64)