RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - COMPONENTS OF NET PERIODIC BENEFIT COST (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Benefits
Net periodic benefit costs:
Service cost — benefits earned during the period	$ 5	$ 7	$ 8
Interest cost on projected benefit obligation	45	36	35
Expected return on plan assets	(45)	(38)	(59)
Recognized actuarial loss (gain)	4	1	2
Recognized prior service credit	0	0	0
Gain (loss) due to settlement	1	(1)	(19)
Net periodic benefit (cost)	10	5	(33)
Postretirement Benefits
Net periodic benefit costs:
Service cost — benefits earned during the period	16	38	42
Interest cost on projected benefit obligation	37	33	33
Expected return on plan assets	0	0	0
Recognized actuarial loss (gain)	(20)	5	15
Recognized prior service credit	(9)	(9)	(9)
Gain (loss) due to settlement	0	0	0
Net periodic benefit (cost)	$ 24	$ 67	$ 81