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REGULATORY MATTERS - New Jersey (Details)								1 Months Ended	3 Months Ended
	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								$ 203,000,000	$ 69,000,000
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 | 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
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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 340
-Name Accounting Standards Codification
-Section 35
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481970/980-340-35-1

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