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v3.23.3

Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | 1.40% | (0.80%) | 1.70% | 0.70%
Tax Reform Excess ADIT Reversal | (5.70%) | (9.70%) | (6.00%) | (7.80%)
Production and Investment Tax Credits | (5.10%) | (12.00%) | (7.40%) | (8.70%)
Flow Through | 0.10% | (0.30%) | (0.20%) | 0.00%
AFUDC Equity | (1.40%) | (1.40%) | (1.40%) | (1.10%)
Discrete Tax Adjustments | (4.10%) | (0.20%) | (2.80%) | (0.20%)
Other | 0.10% | 1.00% | 0.30% | 0.60%
Effective Income Tax Rate | 6.30% | (2.40%) | 5.20% | 4.50%
Income Taxes (Textuals) [Abstract] |  |  |  |
corporate alternative minimum tax |  |  | 15.00% |
Production Tax Credit Proceeds |  |  | $ 80.0 |
AEP Texas Inc. [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | 0.50% | 0.50% | 0.50% | 0.50%
Tax Reform Excess ADIT Reversal | (1.30%) | (2.00%) | (1.30%) | (2.00%)
Production and Investment Tax Credits | 0.10% | (0.40%) | 0.00% | (0.40%)
Flow Through | 0.20% | 0.20% | 0.20% | 0.20%
AFUDC Equity | (1.40%) | (1.20%) | (1.20%) | (1.20%)
Discrete Tax Adjustments | 0.00% | 0.00% | 0.00% | 0.00%
Other | (0.50%) | 0.20% | (0.20%) | 0.10%
Effective Income Tax Rate | 18.60% | 18.30% | 19.00% | 18.20%
AEP Transmission Co [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | 2.80% | 2.60% | 2.70% | 2.70%
Tax Reform Excess ADIT Reversal | (0.20%) | 0.30% | 0.10% | 0.30%
Production and Investment Tax Credits | 0.00% | 0.00% | 0.00% | 0.00%
Flow Through | 0.30% | 0.30% | 0.30% | 0.30%
AFUDC Equity | (2.40%) | (1.90%) | (2.00%) | (1.90%)
Discrete Tax Adjustments | 0.00% | 0.00% | 0.00% | 0.00%
Other | (1.00%) | 0.20% | (0.50%) | 0.10%
Effective Income Tax Rate | 20.50% | 22.50% | 21.60% | 22.50%
Appalachian Power Co [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | 2.20% | (6.20%) | 2.40% | (0.80%)
Tax Reform Excess ADIT Reversal | (5.30%) | (8.60%) | (4.80%) | (10.30%)
Production and Investment Tax Credits | (0.10%) | 0.00% | (0.10%) | 0.00%
Flow Through | 1.80% | (0.70%) | 0.10% | 0.20%
AFUDC Equity | (1.50%) | (0.40%) | (1.20%) | (0.80%)
Discrete Tax Adjustments | 0.00% | 0.00% | 1.50% | (1.80%)
Other | 0.70% | 0.00% | 0.40% | 0.00%
Effective Income Tax Rate | 18.80% | 5.10% | 19.30% | 7.50%
Indiana Michigan Power Co [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | 2.10% | 2.70% | 2.30% | 1.30%
Tax Reform Excess ADIT Reversal | (8.50%) | (13.30%) | (7.60%) | (15.70%)
Production and Investment Tax Credits | (0.70%) | 0.00% | (0.60%) | (1.40%)
Flow Through | 0.70% | (1.50%) | (1.70%) | (1.60%)
AFUDC Equity | (0.50%) | (0.60%) | (0.40%) | (0.80%)
Discrete Tax Adjustments | 0.00% | 0.00% | 0.70% | 0.00%
Other | (3.50%) | (0.50%) | (1.20%) | 0.20%
Effective Income Tax Rate | 10.60% | 7.80% | 12.50% | 3.00%
Ohio Power Co [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | 0.80% | 0.70% | 0.90% | 0.80%
Tax Reform Excess ADIT Reversal | (6.80%) | (6.20%) | (7.30%) | (7.30%)
Production and Investment Tax Credits | 0.00% | 0.00% | 0.00% | 0.00%
Flow Through | 0.80% | 0.40% | 0.80% | 0.50%
AFUDC Equity | (0.80%) | (0.80%) | (0.80%) | (0.70%)
Discrete Tax Adjustments | 0.00% | 0.00% | 0.00% | 0.00%
Other | 1.30% | 0.20% | 0.50% | 0.10%
Effective Income Tax Rate | 16.30% | 15.30% | 15.10% | 14.40%
Public Service Co Of Oklahoma [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | 3.00% | 3.00% | 2.80% | 3.20%
Tax Reform Excess ADIT Reversal | (17.00%) | (21.90%) | (17.10%) | (20.80%)
Production and Investment Tax Credits | (46.90%) | (43.70%) | (48.90%) | (39.50%)
Flow Through | 0.30% | 0.40% | 0.30% | 0.30%
AFUDC Equity | (1.60%) | (0.40%) | (1.50%) | (0.40%)
Discrete Tax Adjustments | 0.00% | 0.00% | 0.00% | 0.00%
Other | (0.20%) | 0.20% | (0.20%) | 0.20%
Effective Income Tax Rate | (41.40%) | (41.40%) | (43.60%) | (36.00%)
Southwestern Electric Power Co [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |  |
U.S. Federal Statutory Rate | 21.00% | 21.00% | 21.00% | 21.00%
State Income Tax, net of Federal Benefit | (4.30%) | (5.30%) | (2.90%) | (1.50%)
Tax Reform Excess ADIT Reversal | (6.20%) | (4.60%) | (5.30%) | (4.80%)
Production and Investment Tax Credits | (25.50%) | (24.10%) | (26.70%) | (22.50%)
Flow Through | (0.20%) | (1.30%) | (0.30%) | (0.80%)
AFUDC Equity | (0.80%) | (0.20%) | (0.50%) | (0.40%)
Discrete Tax Adjustments | 0.00% | 0.00% | 0.00% | 0.30%
Other | 0.20% | (0.20%) | 0.20% | 0.00%
Effective Income Tax Rate | (15.80%) | (14.70%) | (14.50%) | (8.70%)

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