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REGULATORY MATTERS - Maryland and New Jersey (Details) meter in Millions, $ in Millions |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended | 36 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 17, 2022 USD ($) | May 02, 2022 USD ($) | Sep. 14, 2021 USD ($) meter | Mar. 01, 2021 program | Oct. 28, 2020 USD ($) | Jul. 16, 2015 | Apr. 30, 2021 USD ($) | Dec. 31, 2022 | Dec. 31, 2020 USD ($)
PE | Maryland |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Incremental energy savings goal per year (percent) |  |  |  |  |  | 0.20% |  |  |
Incremental energy savings goal thereafter (percent) |  |  |  |  |  | 2.00% |  |  |
PE | Maryland | 2021-2023 EmPOWER Program Cycle |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Expenditures for cost recovery program |  |  |  |  |  |  |  |  | $ 148
Recovery period for expenditures for cost recovery program |  |  |  |  |  |  |  |  | 3 years
Amortization period for expenditures for cost recovery program |  |  |  |  |  |  |  | 5 years |
JCP&L | New Jersey |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Requested ROE | 10.20% |  |  |  |  |  |  |  |
Transmission infrastructure cost | $ 723 |  |  |  |  |  |  |  |
Public utility, offshore development, percent | 20.00% |  |  |  |  |  |  |  |
JCP&L | New Jersey | Regulated Distribution | Advanced Metering Infrastructure Supplemental Filing |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Meter program period |  |  | 6 years |  |  |  |  |  |
Requested rate increase due to costs associated with program |  |  | $ 494 |  |  |  |  |  |
Requested increase due to capital expenditures |  |  | 390 |  |  |  |  |  |
Requested increase due to maintenance expense |  |  | 73 |  |  |  |  |  |
Cost of removal |  |  | $ 31 |  |  |  |  |  |
JCP&L | New Jersey | NJBPU |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Settled amount of increase in revenue |  |  |  |  | $ 94 |  |  |  |
Requested ROE |  |  |  |  | 9.60% |  |  |  |
JCP&L | New Jersey | NJBPU | Regulated Distribution | Energy Efficiency and Peak Demand Reduction Stipulation Settlement |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Requested rate increase (decrease) |  |  |  |  |  |  | $ (203) |  |
Approved rate plan period |  |  |  |  |  |  | 3 years |  |
Approved amount of investment recovery over amortization period |  |  |  |  |  |  | $ 158 |  |
Approved amount of operation costs and maintenance recovery |  |  |  |  |  |  | $ 45 |  |
JCP&L | New Jersey | NJBPU | Regulated Distribution | Energy Efficiency and Peak Demand Reduction |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Amortization period for expenditures for cost recovery program |  |  |  |  |  |  | 10 years |  |
JCP&L | New Jersey | NJBPU | Regulated Distribution | Electrical Vehicle Program |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Electric vehicle program period |  |  |  | 4 years |  |  |  |  |
Number of programs | program |  |  |  | 6 |  |  |  |  |
Public Utilities, Approved Budget, Amount |  | $ 40 |  |  |  |  |  |  |
Public Utilities, Approved Return on Equity, Amount |  | 29 |  |  |  |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Apportioned for Operations and Maintenance Expense, Amount |  | $ 11 |  |  |  |  |  |  |
JCP&L | New Jersey | NJBPU | Regulated Distribution | Advanced metering infrastructure |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |
Number of meters to be deployed | meter |  |  | 1.2 |  |  |  |  |  |
Deployment period |  |  | 3 years |  |  |  |  |  |

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