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EMPLOYEE BENEFIT PLANS - NET PENSION EXPENSE (Details) - Qualified Defined Benefit [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost $ 29 $ 45 $ 52
Interest cost 108 65 56
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits 0 9  
Defined Benefit Plan, Expected Return (Loss) on Plan Assets 114 128 122
Amortization of prior service cost 0 (1) (1)
Defined Benefit Plan, Amortization of Gain (Loss) (23) (8) (37)
Net pension expense (benefit) $ 46 $ (11) $ 22