PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Net Periodic Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pension Benefits
Components of Net Periodic Cost:
Service Cost	$ 1	$ 2	$ 3	$ 4
Interest Cost	6	6	11	11
Expected Return on Plan Assets	(6)	(7)	(11)	(12)
Net Curtailment/Settlement Loss	1	0	1	0
Amortization:
Actuarial Loss (Gain)	1	2	2	3
Net Periodic Cost (Benefit)	3	3	6	6
Postretirement Benefits
Components of Net Periodic Cost:
Service Cost	0	0	0	0
Interest Cost	0	0	0	0
Expected Return on Plan Assets	0	0	0	0
Net Curtailment/Settlement Loss	0	0	0	0
Amortization:
Actuarial Loss (Gain)	(1)	(1)	(1)	(1)
Net Periodic Cost (Benefit)	$ (1)	$ (1)	$ (1)	$ (1)