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Regulatory Matters - Ohio (Details) - OHIO - PUCO meter in Thousands, $ in Thousands | Jul. 15, 2022 USD ($) meter circuit | Nov. 01, 2021 USD ($) | Jun. 01, 2016 USD ($) | Sep. 13, 2021 requirement | Aug. 06, 2021 USD ($)
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Regulatory Matters [Line Items] |  |  |  |  |
Proposed goal to reduce CO2 pollution (percent) |  |  | 90.00% |  |
Energy Conservation, Economic Development and Job Retention |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Contribution amount |  |  | $ 51,000 |  |
Delivery Capital Recovery Rider |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Annual revenue cap for rider for years three through six |  |  | 20,000 |  |
Annual revenue cap for rider for years six through eight |  |  | $ 15,000 |  |
Rider DCR Audit Report | The Ohio Companies |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Refund to customer of pole attachment sates |  |  |  |  | $ 15
Number of requirements with minor non-compliance | requirement |  |  |  | 8 |
Number of requirements | requirement |  |  |  | 23 |
SEET 2017-2019 Cases | The Ohio Companies |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Rate refunds |  | $ 96,000 |  |  |
Ohio Stipulation |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Rate refunds |  | 210,000 |  |  |
Rate refunds in 2022 |  | 80,000 |  |  |
Rate refunds in 2023 |  | 60,000 |  |  |
Rate refunds in 2024 |  | 45,000 |  |  |
Rate refunds in 2025 |  | $ 25,000 |  |  |
Phase Two of Grid Modernization Plan | The Ohio Companies | Subsequent Event |  |  |  |  |
Regulatory Matters [Line Items] |  |  |  |  |
Numbers of additional meters to be installed | meter | 700 |  |  |  |
Number of circuits additional automation equipment to be installed on | circuit | 240 |  |  |  |
Number of circuits additional voltage regulating equipment to be installed on | circuit | 220 |  |  |  |
Period of grid modernization plan | 4 years |  |  |  |
Requested amount of capital investments | $ 626,000 |  |  |  |
Requested amount of operations and maintenance expenses | $ 144,000 |  |  |  |

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