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Regulatory Matters - Rate Plans and Bill Relief Narrative (Details) - USD ($) $ in Millions | 1 Months Ended
--- | ---
Apr. 30, 2024 | Mar. 31, 2024 | Jan. 31, 2024
O&R |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Bill relief program, amount received |  | $ 9.0 |
CECONY |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Bill relief program, amount received |  | $ 91.0 |
Gas | O&R |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount |  |  | $ 3.1
Gas | O&R | Subsequent Event |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount | $ 17.5 |  |
Common Equity Ratio, Percentage | 50.00% |  |
Return on common equity (as a percent) | 10.25% |  |
Gas | O&R | Subsequent Event | Year 2 |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount | $ 22.8 |  |
Gas | O&R | Subsequent Event | Year 3 |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount | 19.2 |  |
Electric | O&R |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount |  |  | $ 7.5
Electric | O&R | Subsequent Event |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount | $ 10.7 |  |
Common Equity Ratio, Percentage | 50.00% |  |
Return on common equity (as a percent) | 10.25% |  |
Electric | O&R | Subsequent Event | Year 2 |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount | $ 34.8 |  |
Electric | O&R | Subsequent Event | Year 3 |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase (decrease), amount | $ 55.0 |  |

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- Definition Amount of regulatory assistance received from a federal regulatory agency in conjunction with either an acquisition of a troubled financial institution, transfer of nonperforming assets to a newly-formed entity, or other reorganization. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 11.N) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480035/942-10-S99-5 + Details
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