PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Net Periodic Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pension Benefits
Components of Net Periodic Cost:
Service Cost	$ 2	$ 3	$ 4	$ 7
Interest Cost	6	3	11	6
Expected Return on Plan Assets	(7)	(5)	(12)	(11)
Amortization:
Actuarial Loss (Gain)	2	1	3	2
Net Periodic Cost (Benefit)	3	2	6	4
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
Amortization:
Actuarial Loss (Gain)	(1)	0	(1)	0
Net Periodic Cost (Benefit)	$ (1)	$ 0	$ (1)	$ 0