v3.25.4
POSTRETIREMENT BENEFIT PLANS - Components of Expense (Income) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Non-operating $ (288) $ (406) $ (382)
Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Curtailment loss (gain)     17
Settlement loss (gain)     61
Pension Plans | U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Service cost – Operating 4 35 35
Interest cost 996 970 1,022
Expected return on plan assets (1,145) (1,196) (1,242)
Amortization of net loss (gain) (65) (68) (121)
Amortization of prior service cost (credit) (11) 8 4
Curtailment loss (gain) 0 0 17
Settlement loss (gain) 0 0 61
Special termination cost 3 1 0
Non-operating (222) (285) (259)
Net periodic expense (income) (218) (250) (224)
Pension Plans | International Plans      
Defined Benefit Plan Disclosure [Line Items]      
Service cost – Operating 21 20 20
Interest cost 151 141 139
Expected return on plan assets (152) (193) (184)
Amortization of net loss (gain) 21 14 6
Amortization of prior service cost (credit) (2) (2) (3)
Curtailment loss (gain) 0 0 0
Settlement loss (gain) (1) 0 0
Special termination cost 0 0 0
Non-operating 17 (40) (42)
Net periodic expense (income) 37 (20) (22)
Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost – Operating 6 7 6
Interest cost 50 54 59
Expected return on plan assets 0 0 0
Amortization of net loss (gain) (64) (61) (64)
Amortization of prior service cost (credit) (80) (87) (87)
Curtailment loss (gain) 0 0 0
Settlement loss (gain) 0 0 0
Special termination cost 1 0 0
Non-operating (92) (94) (92)
Net periodic expense (income) $ (86) $ (87) $ (86)