ORGANIZATION AND BASIS OF PRESENTATION - Regulatory Assets on the Balance Sheet (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Regulatory assets on the Balance Sheets
Regulatory liability	$ (1,214)	$ (1,847)
Regulatory assets	369	33
Net Regulatory Liabilities included on the Consolidated Balance Sheets	(845)	(1,814)
Change	969
Current Return	1,197	997
Change	200
Customer payables for future income taxes
Regulatory assets on the Balance Sheets
Regulatory liability	(2,382)	(2,463)
Change	81
Spent nuclear fuel disposal costs
Regulatory assets on the Balance Sheets
Regulatory liability	(83)	(83)
Change	0
Asset removal costs
Regulatory assets on the Balance Sheets
Regulatory liability	(652)	(675)
Change	23
Deferred transmission costs
Regulatory assets on the Balance Sheets
Regulatory assets	286	50
Change	236
Current Return	6	8
Change	(2)
Deferred generation costs
Regulatory assets on the Balance Sheets
Regulatory assets	572	235
Change	337
Current Return	432	262
Change	170
Deferred distribution costs
Regulatory assets on the Balance Sheets
Regulatory assets	247	164
Change	83
Current Return	68	27
Change	41
Storm-related costs
Regulatory assets on the Balance Sheets
Regulatory assets	799	683
Change	116
Current Return	602	568
Change	34
Uncollectible and pandemic-related costs
Regulatory assets on the Balance Sheets
Current Return	35	45
Change	(10)
Energy efficiency program costs
Regulatory assets on the Balance Sheets
Regulatory assets	198	94
Change	104
New Jersey societal benefit costs
Regulatory assets on the Balance Sheets
Regulatory assets	79	94
Change	(15)
Vegetation management
Regulatory assets on the Balance Sheets
Regulatory assets	102	63
Change	39
Current Return	21	52
Change	(31)
Other
Regulatory assets on the Balance Sheets
Regulatory liability	(11)
Regulatory assets		24
Change	(35)
Current Return	33	$ 35
Change	$ (2)