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Income Tax (Tables) | 9 Months Ended
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Sep. 30, 2020
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 September 30, 2020 and 2019 is as follows:
| Con Edison | CECONY
(% of Pre-tax income) | 2020 | 2019 | 2020 | 2019
STATUTORY TAX RATE |  |  |  |
Federal | 21 | % | 21 | % | 21 | % | 21 | %
Changes in computed taxes resulting from: |  |  |  |
State income tax | 6 |  | 5 |  | 5 |  | 6 |
Amortization of excess deferred federal income taxes | (7) |  | (3) |  | (8) |  | (3) |
Taxes attributable to non-controlling interest | (1) |  | (1) |  | — |  | — |
Cost of removal | 1 |  | 1 |  | 2 |  | — |
Other plant-related items | (1) |  | (1) |  | (1) |  | — |
Renewable energy credits | (1) |  | (1) |  | — |  | — |
Amortization of excess deferred state income taxes | — |  | (1) |  | — |  | (1) |
Reserve for uncertain tax positions | — |  | 1 |  | — |  | — |
Prior period federal income tax return adjustments | — |  | (2) |  | — |  | — |
Other | 1 |  | — |  | — |  | (1) |
Effective tax rate | 19 | % | 19 | % | 19 | % | 22 | %
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 nine months ended September 30, 2020 and 2019 is as follows:
| Con Edison | CECONY
(% of Pre-tax income) | 2020 | 2019 | 2020 | 2019
STATUTORY TAX RATE |  |  |  |
Federal | 21 | % | 21 | % | 21 | % | 21 | %
Changes in computed taxes resulting from: |  |  |  |
State income tax | 5 |  | 5 |  | 5 |  | 6 |
Amortization of excess deferred federal income taxes | (10) |  | (3) |  | (10) |  | (3) |
Taxes attributable to non-controlling interest | (1) |  | (2) |  | — |  | — |
Cost of removal | 2 |  | 1 |  | 2 |  | 1 |
Other plant-related items | (1) |  | — |  | (2) |  | (1) |
Renewable energy credits | (2) |  | (2) |  | — |  | — |
Amortization of excess deferred state income taxes | — |  | (1) |  | — |  | (1) |
Prior period federal income tax return adjustments | — |  | (1) |  | — |  | — |
Other | — |  | — |  | 1 |  | (1) |
Effective tax rate | 14 | % | 18 | % | 17 | % | 22 | %

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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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