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EMPLOYEE BENEFIT PLANS - Change in Benefit Obligation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Pension Benefits      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation, beginning of period $ 2,218 $ 2,254  
Service cost 6 6 $ 6
Interest cost 103 107  
Actuarial (gains)/losses (52) 60  
Benefits paid (195) (191)  
Settlements (39) (12)  
Projected benefit obligation, end of period 2,035 2,218 2,254
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]      
Pension plan assets at fair value, beginning of period 2,106 2,110  
Actual return on plan assets 82 149  
Contributions 35 0  
Benefits paid and fees (200) (159)  
Settlements (39) (12)  
Other 0 18  
Pension plan assets at fair value, end of period 1,984 2,106 2,110
PBO 2,035 2,218  
Excess of PBO Over Pension Plan Assets 51 112  
Post-retirement Plans      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Projected benefit obligation, beginning of period 353 349  
Service cost 1 1 2
Interest cost 16 17  
Contributions and benefits paid (21) (19)  
Actuarial (gains)/losses (24) 5  
Benefits paid (21) (19)  
Projected benefit obligation, end of period $ 325 $ 353 $ 349