REGULATORY MATTERS - New Jersey (Details)										1 Months Ended
	Oct. 18, 2024 USD ($)	May 22, 2024 USD ($)	Feb. 27, 2024 USD ($)	Feb. 01, 2024 USD ($) circuit	Dec. 01, 2023 USD ($) program	Nov. 09, 2023 USD ($)	Oct. 31, 2023 windFarm MW	Apr. 17, 2023	Oct. 26, 2022 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2024 USD ($)
FERC | Regulated Transmission
Regulatory Matters [Line Items]
Pre-tax impairment of regulatory asset											$ 53,000,000
New Jersey | JCP And L
Regulatory Matters [Line Items]
Approved amount of annual increase									$ 723,000,000
Approved ROE									10.20%
Public utility, offshore development, percent									20.00%
Recovery of transmission incentive rates, percentage								100.00%
Recovery of transmission incentive rates prior to approval date								50.00%
Public utilities, number of offshore wind projects that development ceased | windFarm							2
Plant capacity (in MW's) | MW							2,248
New Jersey | Energy Efficiency and Peak Demand Reduction Stipulation Settlement | NJBPU | Distribution Segment | JCP And L
Regulatory Matters [Line Items]
Remaining amount of regulatory liability amortization				$ 18,000,000
Number of high-priority circuits | circuit				18
Initial investment				$ 95,000,000
Amount of requested rate increase		$ 69,000,000								$ 203,000,000
Approved investment recovery										160,000,000
Approved amount of operation and maintenance recovery										$ 43,000,000
Requested rate extension period		6 months
Amended amount of rate increase					$ 964,000,000
Number of energy program | program					10
Number of peak demand reduction program | program					1
Building decarbonization program | program					1
Approved period of rate plan										3 years
New Jersey | Energy Efficiency and Peak Demand Reduction Stipulation Settlement | NJBPU | Distribution Segment | JCP And L | Subsequent Event
Regulatory Matters [Line Items]
Recovery period	10 years
Amended amount of rate increase	$ 817,000,000
Amount of investments	$ 784,000,000
Requested increase to ROE	9.60%
Equity ratio, percentage	52.00%
New Jersey | Energy Efficiency and Peak Demand Reduction | NJBPU | Distribution Segment | JCP And L
Regulatory Matters [Line Items]
Amortization period										10 years
New Jersey | Energy Efficiency and Peak Demand Reduction | NJBPU | Distribution Segment | Jcp And L
Regulatory Matters [Line Items]
Amount of requested rate increase			$ 930,500,000			$ 935,000,000
Recovery period			5 years
Public utilities, requested rate increase (decrease), amount, capital commitments						906,000,000
Public utilities, requested rate increase (decrease), amount, operating and maintenance expense						$ 29,000,000