REGULATORY MATTERS - Maryland and New Jersey (Details)																		1 Months Ended	12 Months Ended
	Feb. 01, 2024 USD ($) circuit	Jan. 03, 2024 USD ($)	Dec. 29, 2023 USD ($)	Dec. 05, 2023 USD ($)	Dec. 01, 2023 USD ($) program	Nov. 09, 2023 USD ($)	Oct. 31, 2023 MW windFarm	Oct. 18, 2023 USD ($)	Aug. 07, 2023 USD ($)	Aug. 01, 2023 USD ($)	Jul. 17, 2023 USD ($)	Apr. 17, 2023 USD ($)	Mar. 22, 2023 USD ($) program	Mar. 16, 2023 USD ($) program	Oct. 26, 2022 USD ($)	Nov. 01, 2021	Oct. 28, 2020 USD ($)	Apr. 30, 2021 USD ($)	Dec. 31, 2023
Maryland
Regulatory Matters [Line Items]
Increase base distribution rate								$ 28,000,000
Maryland | Subsequent Event
Regulatory Matters [Line Items]
Increase base distribution rate		$ 700,000
PE
Regulatory Matters [Line Items]
Amount of requested rate increase													$ 50,400,000
PE | FERC
Regulatory Matters [Line Items]
Support costs								$ 12,000,000
PE | Maryland
Regulatory Matters [Line Items]
Number of service reliability and resiliency programs | program													3
Number of programs | program													2
Incremental energy savings goal per year (percent)													0.20%
Incremental energy savings goal thereafter (percent)													2.00%
PE | Maryland | Power Purchase Agreements
Regulatory Matters [Line Items]
Annual termination fee												$ 51,000,000
Amount of termination fee												357,000,000
PE | Maryland | Power Purchase Agreements | Other Current Liabilities
Regulatory Matters [Line Items]
Amount of termination fee												55,000,000
PE | Maryland | Power Purchase Agreements | Other Noncurrent Liabilities
Regulatory Matters [Line Items]
Amount of termination fee												$ 302,000,000
PE | Maryland | 2021-2023 EmPOWER Program Cycle
Regulatory Matters [Line Items]
Amortization period													5 years
PE | Maryland | 2024-2026 EmPOWER Program Cycle
Regulatory Matters [Line Items]
Recovery period for expenditures for cost recovery program										3 years
Public utilities, requested cost percentage, year one										0.33
Public utilities, requested cost percentage, year two										0.67
Public utilities, requested cost percentage, year three										1
Public utilities, requested year one										$ 310,000,000
Public utilities, requested year two										354,000,000
Public utilities, requested year three										$ 510,000,000
Approved amount of rate increase (decrease)			$ 310,000,000
JCP And L | New Jersey
Regulatory Matters [Line Items]
Approved amount of rate increase (decrease)															$ 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, percentage												50.00%
Number of cease development | windFarm							2
Plant capacity (in MW's) | MW							2,248
JCP And L | New Jersey | NJBPU
Regulatory Matters [Line Items]
Amount of requested rate increase											$ 31,000,000
Amount of revenue increase																	$ 94,000,000
Requested increase to ROE																9.60%
JCP And L | New Jersey | NJBPU | Energy Efficiency and Peak Demand Reduction Stipulation Settlement | Utilities and Transmission Companies
Regulatory Matters [Line Items]
Amount of requested rate increase				$ 69,300,000														$ 203,000,000
Increase base distribution rate									$ 192,000,000					$ 185,000,000
Number of proposed programs | program														2
Approved rate plan period																		3 years
Approved amount of investment recovery over amortization period																		$ 160,000,000
Approved amount of operation costs and maintenance recovery																		$ 43,000,000
Number of extension period				6 months
Revised requested rate increase					$ 964,000,000
Number of energy program | program					10
Number of peak demand reduction program | program					1
Building decarbonization program | program					1
JCP And L | New Jersey | NJBPU | Energy Efficiency and Peak Demand Reduction | Utilities and Transmission Companies
Regulatory Matters [Line Items]
Amortization period																		10 years
JCP And L | New Jersey | Subsequent Event | NJBPU | Energy Efficiency and Peak Demand Reduction Stipulation Settlement | Utilities and Transmission Companies
Regulatory Matters [Line Items]
Increase base distribution rate	$ 85,000,000
Remaining amount of regulatory liability amortization	18,000,000
Initial investment	$ 95
Number of high-priority circuits | circuit	18
JCP&L
Regulatory Matters [Line Items]
Approved ROE																			9.60%
JCP&L | New Jersey | NJBPU | Energy Efficiency and Peak Demand Reduction | Utilities and Transmission Companies
Regulatory Matters [Line Items]
Amount of requested rate increase						$ 935,000,000
Amount of requested rate increase, capital commitments						906,000,000
Amount of requested rate increase, operating and maintenance expense						$ 29,000,000