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EMPLOYEE BENEFIT PLANS (Reconciliation of Changes in Plan Assets Benefit Obligations and Funded Status) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Funded Status:      
Noncurrent liability $ (808) $ (476)  
Pension Plan      
Change in plan assets:      
Fair value of plan assets at beginning of year 17,211 16,369  
Actual return on plan assets 218 1,518  
Company contributions 337 336  
Benefits and expenses paid (999) (1,012)  
Fair value of plan assets at end of year 16,767 17,211 $ 16,369
Change in benefit obligation:      
Benefit obligation at beginning of year 17,697 16,608  
Service cost for benefits earned 396 379 575
Interest cost 916 913 692
Actuarial loss/(gain) (424) 809  
Benefits and expenses paid (1,000) (1,012)  
Benefit obligation at end of year 17,585 17,697 16,608
Funded Status:      
Current liability (10) (9)  
Noncurrent liability (808) (477)  
Net (liability) asset at end of year (818) (486)  
Accumulated benefit obligation 15,800 16,300  
PBOP Plans      
Change in plan assets:      
Fair value of plan assets at beginning of year 2,499 2,336  
Actual return on plan assets 74 260  
Company contributions 5 5  
Plan participant contribution 84 81  
Benefits and expenses paid (191) (183)  
Fair value of plan assets at end of year 2,471 2,499 2,336
Change in benefit obligation:      
Benefit obligation at beginning of year 1,377 1,339  
Service cost for benefits earned 41 38 62
Interest cost 71 73 53
Actuarial loss/(gain) (123) 8  
Benefits and expenses paid (174) (165)  
Federal subsidy on benefits paid 3 3  
Plan participant contributions 84 81  
Benefit obligation at end of year 1,279 1,377 $ 1,339
Funded Status:      
Noncurrent asset 1,192 1,122  
Noncurrent liability 0 0  
Net (liability) asset at end of year 1,192 1,122  
PBOP Plans | Postretirement Life Insurance Plan      
Change in plan assets:      
Fair value of plan assets at beginning of year 292    
Fair value of plan assets at end of year 296 292  
Change in benefit obligation:      
Benefit obligation at beginning of year 275    
Benefit obligation at end of year $ 261 $ 275