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Regulatory Matters - Maryland and New Jersey (Details) meter in Millions, $ in Millions |  |  |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 01, 2021 | Sep. 14, 2021 USD ($) | Apr. 23, 2021 USD ($) | Mar. 01, 2021 USD ($) program | Oct. 28, 2020 USD ($) | Aug. 27, 2020 USD ($) meter | Mar. 31, 2022 USD ($)
PE | Maryland |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
Incremental energy savings goal per year (percent) |  |  |  |  |  |  | 0.20%
Incremental energy savings goal thereafter (percent) |  |  |  |  |  |  | 2.00%
Amortization period |  |  |  |  |  |  | 5 years
Amount of requested rate increase (decrease) |  |  |  |  |  |  | $ 148
Recovery period for expenditures for cost recovery program |  |  |  |  |  |  | 3 years
JCP&L | Advanced Metering Infrastructure | New Jersey | Regulated Distribution |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
Amount of requested rate increase (decrease) |  |  |  |  |  | $ 732 |
JCP&L | Advanced Metering Infrastructure Supplemental Filing | New Jersey | Regulated Distribution |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
First period of the program |  | 6 years |  |  |  |  |
Costs associated with program |  | $ 494 |  |  |  |  |
Amount of capital expenditures |  | 390 |  |  |  |  |
Amount of maintenance expense |  | 73 |  |  |  |  |
Cost of removal |  | $ 31 |  |  |  |  |
JCP&L | NJBPU | New Jersey |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
Requested increase to ROE | 9.60% |  |  |  |  |  |
Amount of revenue increase |  |  |  |  | $ 94 |  |
JCP&L | NJBPU | Advanced Metering Infrastructure | New Jersey | Regulated Distribution |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
Meter deployment period |  |  |  |  |  | 3 years |
Number of meters to be deployed | meter |  |  |  |  |  | 1.2 |
Expected cost of the program |  |  |  |  |  | $ 418 |
Time period of the program |  |  |  |  |  | 20 years |
JCP&L | NJBPU | Energy Efficiency and Peak Demand Reduction | New Jersey | Regulated Distribution |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
Amortization period |  |  | 10 years |  |  |  |
JCP&L | NJBPU | Electrical Vehicle Program | New Jersey | Regulated Distribution |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
Amount of requested rate increase (decrease) |  |  |  | $ 50 |  |  |
Number of programs | program |  |  |  | 6 |  |  |
Electric vehicle program period |  |  |  | 4 years |  |  |
Amount of requested return on capital |  |  |  | $ 16 |  |  |
Requested amount for operations and maintenance expense |  |  |  | $ 34 |  |  |
JCP&L | NJBPU | Energy Efficiency and Peak Demand Reduction Stipulation Settlement | New Jersey | Regulated Distribution |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |
Amount of requested rate increase (decrease) |  |  | $ 203 |  |  |  |
Approved period of rate plan |  |  | 3 years |  |  |  |
Approved investment recovery |  |  | $ 158 |  |  |  |
Approved amount of operation and maintenance recovery |  |  | $ 45 |  |  |  |

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