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v3.25.2

FINANCING ACTIVITIES - Repayments and Retirements of Debt (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 1,324.1 | $ 1,769.1
AEP Texas |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | 12.2 | 244.5
AEP Texas | 2.06% Securitization Bonds | Securitization Bonds |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 10.3 |
Interest Rate | 2.06% |
AEP Texas | 2.29% Securitization Bonds | Securitization Bonds |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 1.9 |
Interest Rate | 2.29% |
AEPTCo |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 90.0 | 0.0
AEPTCo | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Interest Rate | 5.38% |
AEPTCo | 3.66% Senior Unsecured Notes | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 50.0 |
Interest Rate | 3.66% |
AEPTCo | 3.76% Senior Unsecured Notes | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 40.0 |
Interest Rate | 3.76% |
APCo |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 418.4 | 399.5
APCo | Securitization Bonds |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 13.9 |
Interest Rate | 3.77% |
APCo | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 300.0 |
Interest Rate | 3.40% |
APCo | Other Long-term Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 0.1 |
Interest Rate | 13.72% |
APCo | Pollution Control Bonds |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.70% |
APCo | 3.75% Pollution Control Bonds | Pollution Control Bonds |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 104.4 |
Interest Rate | 3.75% |
I&M |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 240.0 | 48.6
I&M | Other Long-term Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 0.2 |
Interest Rate | 6.00% |
I&M | Pollution Control Bonds |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.70% |
I&M | Notes Payable |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.89% |
I&M | Variable Note Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 1.1 |
I&M | 0.93% Notes Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 2.6 |
Interest Rate | 0.93% |
I&M | 3.44% Notes Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 7.5 |
Interest Rate | 3.44% |
I&M | 5.93% Notes Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 8.7 |
Interest Rate | 5.93% |
I&M | 6.01% Notes Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 10.1 |
Interest Rate | 6.01% |
I&M | 6.41% Notes Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 16.3 |
Interest Rate | 6.41% |
I&M | 4.89% Note Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 3.5 |
Interest Rate | 4.89% |
I&M | 0.75% Pollution Control Bonds | Pollution Control Bonds |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 40.0 |
Interest Rate | 0.75% |
I&M | 2.75% Pollution Control Bonds | Pollution Control Bonds |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 50.0 |
Interest Rate | 2.75% |
I&M | 3.05% Pollution Control Bonds | Pollution Control Bonds |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 100.0 |
Interest Rate | 3.05% |
PSO |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 125.3 | $ 0.3
PSO | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Interest Rate | 5.45% |
PSO | Other Long-term Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 0.3 |
Interest Rate | 3.00% |
PSO | 3.17% Senior Unsecured Notes | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 125.0 |
Interest Rate | 3.17% |
KPCo | Securitization Bonds |  |
Debt Instrument [Line Items] |  |
Interest Rate | 5.30% |
KPCo | Variable Other Long-term Debt | Other Long-term Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 150.0 |
Transource Energy | 2.75 % Senior Unsecured Notes | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 1.2 |
Interest Rate | 2.75% |
WPCo | 3.70% Senior Unsecured Notes | Senior Unsecured Notes |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 122.0 |
Interest Rate | 3.70% |
WPCo | 6.89% Notes Payable | Notes Payable |  |
Debt Instrument [Line Items] |  |
Principal Amount Paid | $ 15.0 |
Interest Rate | 6.89% |

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