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Income Tax (Tables) | 3 Months Ended
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Mar. 31, 2021
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, 2021 and 2020 is as follows:
| Con Edison | CECONY
(% of Pre-tax income) | 2021 | 2020 | 2021 | 2020
STATUTORY TAX RATE |  |  |  |
Federal | 21 | % | 21 | % | 21 | % | 21 | %
Changes in computed taxes resulting from: |  |  |  |
State income tax | 4 |  | 4 |  | 5 |  | 5 |
Amortization of excess deferred federal income taxes | (9) |  | (9) |  | (7) |  | (8) |
Taxes attributable to non-controlling interests | — |  | (1) |  | — |  | — |
Cost of removal | 2 |  | 2 |  | 1 |  | 2 |
Other plant-related items | (1) |  | (1) |  | — |  | (1) |
Renewable energy credits | (1) |  | (2) |  | — |  | — |
CARES Act NOL carryback | — |  | (1) |  | — |  | — |
Other | — |  | (1) |  | — |  | — |
Effective tax rate | 16 | % | 12 | % | 20 | % | 19 | %

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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