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REGULATORY MATTERS - Ohio (Details) - PUCO $ in Thousands |  |  |  |  |  |  | 1 Months Ended |  |  |
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Feb. 21, 2025 USD ($) | Dec. 18, 2024 USD ($) | Sep. 30, 2024 USD ($) payment | Jul. 31, 2024 USD ($) | May 31, 2024 USD ($) | Apr. 05, 2023 | Jan. 31, 2025 USD ($) | May 15, 2024 USD ($) | Sep. 13, 2021 requirement | Aug. 06, 2021 USD ($)
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Commitment to spend |  |  |  |  |  |  | $ 6,500 |  |  |
OHIO |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Proposed goal to reduce CO2 pollution (percent) |  | 90.00% |  |  |  |  |  |  |  |
Delivery Capital Recovery Rider | OHIO |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Annual revenue cap for DCR rider |  | $ 390,000 |  |  |  |  |  |  |  |
Requested increase in revenue cap |  | 15,000 |  |  |  |  |  |  |  |
Energy Conservation, Economic Development and Job Retention | OHIO |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Contribution amount |  | $ 6,390 |  |  |  |  |  |  |  |
The Ohio Companies | ESP V |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Approved bill assistance contribution amount |  |  |  |  |  |  |  | $ 32,500 |  |
The Ohio Companies | Rider DCR Audit Report | OHIO |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Refund to customer of pole attachment sates |  |  | $ 15 |  |  |  |  |  |  | $ 15
Public utilities, number of audit examined payments | payment |  |  | 53 |  |  |  |  |  |  |
Public utilities, audit examined payment amount |  |  | $ 75,000 |  |  |  |  |  |  |
Number of requirements with minor non-compliance | requirement |  |  |  |  |  |  |  |  | 8 |
Number of requirements | requirement |  |  |  |  |  |  |  |  | 23 |
CEI | Delivery Capital Recovery Rider | OHIO | Distribution Segment |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Approved ROE | 9.63% |  |  |  | 10.80% |  |  |  |  |
Capital structure, debt | 48.80% |  |  |  | 44.00% |  |  |  |  |
Capital structure, equity | 51.20% |  |  |  | 56.00% |  |  |  |  |
CEI | Energy Efficiency and Peak Demand Reduction Stipulation Settlement | OHIO | Distribution Segment |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Increase base distribution rate | $ 8,000 |  |  |  | $ 94,000 |  |  |  |  |
Public utilities, adjusted rate increase base distribution |  |  |  | $ 190,000 |  |  |  |  |  |
OE | Delivery Capital Recovery Rider | OHIO | Distribution Segment |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Capital structure, debt |  |  |  |  | 46.00% |  |  |  |  |
Capital structure, equity |  |  |  |  | 54.00% |  |  |  |  |
TE | Delivery Capital Recovery Rider | OHIO | Distribution Segment |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Capital structure, debt |  |  |  |  | 45.00% |  |  |  |  |
Capital structure, equity |  |  |  |  | 55.00% |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Amount of revenue increase |  |  |  |  |  |  | 37,000 |  |  |
Minimum | The Ohio Companies |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Approved period of rate plan |  |  |  |  |  | 8 years |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Amount of revenue increase |  |  |  |  |  |  | $ 43,000 |  |  |
Maximum | The Ohio Companies | Rider DCR Audit Report | OHIO |  |  |  |  |  |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |  |  |  |  |  |
Loss contingency, payment audit, payments in support of passage of house bill allocated to defendants |  |  | $ 5,000 |  |  |  |  |  |  |

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