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PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
May 13, 2023
May 12, 2023
Jun. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Defined benefit plan, assumptions used calculating benefit obligation, increase (decrease) in discount rate     0.29%    
Employee benefit plan funding and related payments       $ (44) $ (39)
Pension          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Voluntary cash contribution   $ 750      
Discount rate 8.00%        
Expected future contributions   $ 260      
Pension and OPEB mark-to -market adjustment     $ 59 $ 0 $ 59