v3.25.2
FINANCING ACTIVITIES - Issuances of Debt (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2025
USD ($)
Debt Instrument [Line Items]  
Total Issuances $ 3,186.6
Other Long-term Debt | AEP Texas  
Debt Instrument [Line Items]  
Total Issuances 400.0
Other Long-term Debt | APCo  
Debt Instrument [Line Items]  
Total Issuances $ 425.0
Interest Rate 13.72%
Other Long-term Debt | I&M  
Debt Instrument [Line Items]  
Interest Rate 6.00%
Other Long-term Debt | PSO  
Debt Instrument [Line Items]  
Interest Rate 3.00%
Other Long-term Debt | KPCo  
Debt Instrument [Line Items]  
Total Issuances $ 150.0
Other Long-term Debt | Transource Energy  
Debt Instrument [Line Items]  
Total Issuances 29.5
Other Long-term Debt | WPCo  
Debt Instrument [Line Items]  
Total Issuances 125.0
Senior Unsecured Notes | AEPTCo  
Debt Instrument [Line Items]  
Total Issuances $ 425.0
Interest Rate 5.38%
Senior Unsecured Notes | APCo  
Debt Instrument [Line Items]  
Interest Rate 3.40%
Senior Unsecured Notes | PSO  
Debt Instrument [Line Items]  
Total Issuances $ 800.0
Interest Rate 5.45%
Pollution Control Bonds | APCo  
Debt Instrument [Line Items]  
Total Issuances $ 104.4
Interest Rate 3.70%
Pollution Control Bonds | I&M  
Debt Instrument [Line Items]  
Total Issuances $ 150.0
Interest Rate 3.70%
Notes Payable | I&M  
Debt Instrument [Line Items]  
Total Issuances $ 100.0
Interest Rate 4.89%
Securitization Bonds | APCo  
Debt Instrument [Line Items]  
Interest Rate 3.77%
Securitization Bonds | KPCo  
Debt Instrument [Line Items]  
Total Issuances $ 477.7
Interest Rate 5.30%