v3.25.1
POSTRETIREMENT BENEFIT PLANS - Components of Expense (Income) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Non-operating $ (74) $ (102)
Pension Plans | U.S. Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost – Operating 1 8
Interest cost 249 242
Expected return on plan assets (287) (298)
Amortization of net loss (gain) (20) (17)
Amortization of prior service cost (credit) (3) 2
Special termination cost 1 0
Non-operating (60) (71)
Net periodic expense (income) (59) (63)
Pension Plans | International Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost – Operating 5 5
Interest cost 36 35
Expected return on plan assets (36) (48)
Amortization of net loss (gain) 5 3
Amortization of prior service cost (credit) (1) 0
Special termination cost 0 0
Non-operating 4 (10)
Net periodic expense (income) 9 (5)
Other Postretirement Benefits Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost – Operating 1 2
Interest cost 13 13
Expected return on plan assets 0 0
Amortization of net loss (gain) (15) (15)
Amortization of prior service cost (credit) (20) (22)
Special termination cost 0 0
Non-operating (21) (24)
Net periodic expense (income) $ (20) $ (22)