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Income Tax (Tables) | 3 Months Ended
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Mar. 31, 2024
Income Tax Disclosure [Abstract] |
Schedule of Income Tax Reconciliation | Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the three months ended March 31, 2024 and 2023 is as follows:
| For the Three Months Ended March 31, |  |
| Con Edison | CECONY |  |
(% of Pre-tax income) | 2024 | 2023 | 2024 | 2023 |  |
STATUTORY TAX RATE |  |  |  |  |  |
Federal | 21 | % | 21 | % | 21 | % | 21 | % |  |
Changes in computed taxes resulting from: |  |  |  |  |  |
State income tax, net of federal income taxes | 5 |  | 5 |  | 5 |  | 5 |  |  |
Amortization of excess deferred federal income taxes | (6) |  | (3) |  | (5) |  | (6) |  |  |
Cost of removal | 1 |  | — |  | 1 |  | 1 |  |  |
Allowance for uncollectible accounts, net of COVID-19 assistance | (1) |  | — |  | (1) |  | (1) |  |  |
Impacts from the sale of the Clean Energy Businesses: |  |  |  |  |  |
Deferred unamortized ITC recognized on sale of subsidiary | — |  | (7) |  | — |  | — |  |  |
Changes in state apportionments, net of federal income taxes | — |  | (3) |  | — |  | — |  |  |
Valuation allowance on state NOLs, net of federal income tax | — |  | 1 |  | — |  | — |  |  |
Effective tax rate | 20 | % | 14 | % | 21 | % | 20 | % |  |

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 12 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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