PENSION AND OTHER POST-EMPLOYMENT BENEFITS - Narrative (Details) $ in Millions				3 Months Ended	8 Months Ended	9 Months Ended
	May 12, 2023 USD ($)	Apr. 30, 2023	Dec. 31, 2022	Jun. 30, 2023 USD ($)	Dec. 31, 2023	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	May 09, 2023 employee
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percent of eligible employees that accepted the voluntary retirement program								0.65
Number of employees | employee								450
Number of separated employees | employee								90
Defined benefit plan, assumptions used calculating benefit obligation, increase (decrease) in discount rate				0.29%
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Voluntary cash contribution	$ 750
Voluntary contribution, percentage		7.70%
Estimated return						800.00%
Discount rate		4.94%	5.23%
Pension and OPEB mark-to-market adjustment						$ (59)	$ 0
Pension | Forecast
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated return					5.30%
Discount rate					8.00%
OPEB
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated return						7.00%
Discount rate			5.16%
Pension and OPEB mark-to-market adjustment						$ 0	$ 0
Pension Mark-to-market Adjustment
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit cost, pre-tax				$ 47