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Income Tax - Income Tax Reconciliation (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
STATUTORY TAX RATE |  |  |  |
Federal | 21.00% | 21.00% | 21.00% | 21.00%
Changes in computed taxes resulting from: |  |  |  |
State income tax | 6.00% | 5.00% | 5.00% | 5.00%
Amortization of excess deferred federal income taxes | (7.00%) | (3.00%) | (10.00%) | (3.00%)
Taxes attributable to non-controlling interest | (1.00%) | (1.00%) | (1.00%) | (2.00%)
Cost of removal | 1.00% | 1.00% | 2.00% | 1.00%
Other plant-related items | (1.00%) | (1.00%) | (1.00%) | 0.00%
Renewable energy credits | (1.00%) | (1.00%) | (2.00%) | (2.00%)
Amortization of excess deferred state income taxes | 0.00% | (1.00%) | 0.00% | (1.00%)
Reserve for uncertain tax positions | 0.00% | 1.00% |  |
Prior period federal income tax return adjustments | 0.00% | (2.00%) | 0.00% | (1.00%)
Other | 1.00% | 0.00% | 0.00% | 0.00%
Effective tax rate | 19.00% | 19.00% | 14.00% | 18.00%
CECONY |  |  |  |
STATUTORY TAX RATE |  |  |  |
Federal | 21.00% | 21.00% | 21.00% | 21.00%
Changes in computed taxes resulting from: |  |  |  |
State income tax | 5.00% | 6.00% | 5.00% | 6.00%
Amortization of excess deferred federal income taxes | (8.00%) | (3.00%) | (10.00%) | (3.00%)
Taxes attributable to non-controlling interest | 0.00% | 0.00% | 0.00% | 0.00%
Cost of removal | 2.00% | 0.00% | 2.00% | 1.00%
Other plant-related items | (1.00%) | 0.00% | (2.00%) | (1.00%)
Renewable energy credits | 0.00% | 0.00% | 0.00% | 0.00%
Amortization of excess deferred state income taxes | 0.00% | (1.00%) | 0.00% | (1.00%)
Reserve for uncertain tax positions | 0.00% | 0.00% |  |
Prior period federal income tax return adjustments | 0.00% | 0.00% | 0.00% | 0.00%
Other | 0.00% | (1.00%) | 1.00% | (1.00%)
Effective tax rate | 19.00% | 22.00% | 17.00% | 22.00%

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