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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Pension Plan [Member]    
Defined Benefit Plan Disclosures [Line Items]    
Service cost $ 10 $ 14
Interest cost 246 252
Expected return on plan assets 319 346
Amortization of prior service credit (3) (3)
Defined Benefit Plan, Amortization of (Gain) Loss 40 35
Net periodic benefit cost (26) (48)
Other Postretirement Benefits [Member]    
Defined Benefit Plan Disclosures [Line Items]    
Service cost 1 1
Interest cost 9 11
Defined Benefit Plan, Amortization of (Gain) Loss (11) (10)
Net periodic benefit cost $ (1) $ 2