v3.25.2
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 32 $ 34 $ 64 $ 68
Interest cost 61 58 121 115
Expected return on plan assets (68) (69) (136) (138)
Amortization of unrecognized (gain) loss (2) 5 (3) 10
Amortization of prior service credit 0 0 0 0
Total 23 28 46 55
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 1 2 3 3
Interest cost 8 9 16 19
Expected return on plan assets 0 (1) (1) (1)
Amortization of unrecognized (gain) loss (8) (6) (15) (13)
Amortization of prior service credit (22) (24) (43) (47)
Total $ (20) $ (20) $ (41) $ (39)