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Income Tax - Income Tax Reconciliation (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
STATUTORY TAX RATE |  |  |  |
Federal | 21.00% | 21.00% | 21.00% | 21.00%
Changes in computed taxes resulting from: |  |  |  |
State income tax, net of federal income tax benefit | 8.00% | 6.00% | 5.00% | 6.00%
Taxes attributable to non-controlling interest |  |  | 0.00% | 1.00%
Cost of removal | 1.00% | 1.00% | 1.00% | 1.00%
Other plant-related items |  |  | 0.00% | 0.00%
Renewable energy credits | 0.00% | (1.00%) | (1.00%) | (2.00%)
Allowance for uncollectible accounts, net of COVID-19 assistance | (2.00%) | 0.00% |  |
Amortization of excess deferred federal income taxes | (6.00%) | (6.00%) | (5.00%) | (8.00%)
State taxes on sale of subsidiary, net of federal income tax benefit | 0.01 | 0 |  |
Changes in state apportionments, net of federal income taxes |  |  | (0.01) | 0
Deferred unamortized investment tax credit recognized on sale of subsidiary |  |  | (0.04) | 0
Other | (2.00%) | 0.00% | 0.00% | 0.00%
Effective tax rate | 21.00% | 21.00% | 16.00% | 19.00%
CECONY | Subsidiaries |  |  |  |
STATUTORY TAX RATE |  |  |  |
Federal | 21.00% | 21.00% | 21.00% | 21.00%
Changes in computed taxes resulting from: |  |  |  |
State income tax, net of federal income tax benefit | 5.00% | 5.00% | 5.00% | 5.00%
Taxes attributable to non-controlling interest |  |  | 0.00% | 0.00%
Cost of removal | 1.00% | 1.00% | 2.00% | 2.00%
Other plant-related items |  |  | (1.00%) | (1.00%)
Renewable energy credits | 0.00% | 0.00% | 0.00% | 0.00%
Allowance for uncollectible accounts, net of COVID-19 assistance | (2.00%) | 1.00% |  |
Amortization of excess deferred federal income taxes | (7.00%) | (7.00%) | (8.00%) | (10.00%)
State taxes on sale of subsidiary, net of federal income tax benefit | 0 | 0 |  |
Changes in state apportionments, net of federal income taxes |  |  | 0 | 0
Deferred unamortized investment tax credit recognized on sale of subsidiary |  |  | 0 | 0
Other | (1.00%) | (1.00%) | 0.00% | 0.00%
Effective tax rate | 17.00% | 20.00% | 19.00% | 17.00%

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