ORGANIZATION AND BASIS OF PRESENTATION - Regulatory Assets on the Balance Sheet (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Regulatory assets on the Balance Sheets
Regulatory liability	$ (1,847)	$ (2,124)
Regulatory assets	33	71
Net Regulatory Liabilities included on the Consolidated Balance Sheets	(1,814)	(2,053)
Change	239
Current Return	997	732
Change	265
Customer payables for future income taxes
Regulatory assets on the Balance Sheets
Regulatory liability	(2,463)	(2,345)
Change	(118)
Spent nuclear fuel disposal costs
Regulatory assets on the Balance Sheets
Regulatory liability	(83)	(101)
Change	18
Asset removal costs
Regulatory assets on the Balance Sheets
Regulatory liability	(675)	(646)
Change	(29)
Deferred transmission costs
Regulatory assets on the Balance Sheets
Regulatory assets	50	(3)
Change	53
Current Return	8	13
Change	(5)
Deferred generation costs
Regulatory assets on the Balance Sheets
Regulatory assets	235	118
Change	117
Current Return	262	63
Change	199
Deferred distribution costs
Regulatory assets on the Balance Sheets
Regulatory assets	164	49
Change	115
Current Return	27	2
Change	25
Storm-related costs
Regulatory assets on the Balance Sheets
Regulatory assets	683	660
Change	23
Current Return	568	549
Change	19
Uncollectible and pandemic-related costs
Regulatory assets on the Balance Sheets
Regulatory assets	63	56
Change	7
Current Return	70	65
Change	5
Energy efficiency program costs
Regulatory assets on the Balance Sheets
Regulatory assets	94	47
Change	47
New Jersey societal benefit costs
Regulatory assets on the Balance Sheets
Regulatory assets	94	109
Change	(15)
Vegetation management
Regulatory assets on the Balance Sheets
Regulatory assets	63	33
Change	30
Current Return	52	31
Change	21
Other
Regulatory assets on the Balance Sheets
Regulatory liability	(39)	(30)
Change	(9)
Current Return	10	$ 9
Change	$ 1