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EMPLOYEE BENEFIT PLANS - Fair Value of Plan Assets (Details) - Net Periodic Pension Expense - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Projected benefit obligation $ 2,218 $ 2,254 $ 2,900
Accumulated benefit obligation 2,218 2,254  
Fair value of plan assets $ 2,106 $ 2,110 $ 2,808