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REGULATORY MATTERS - New Jersey (Details) |  |  |  |  |  |  |  |  |  | 1 Months Ended |
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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 |  |  |  |  |

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