STOCK-BASED COMPENSATION PLANS - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 83	$ 101	$ 90
Stock-based compensation costs, net of amounts capitalized	44	54	43
Incentive Plans | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	39	55	40
Incentive Plans | Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	5	3	2
401(k) savings plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	38	36	35
EDCP & DCPD
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 1	$ 7	$ 13