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v3.24.3

Voluntary Severance Program (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 USD ($) | Jun. 30, 2024 USD ($) | Sep. 30, 2024 USD ($)
Employees Participating in Voluntary Severance Program |  | 1,000 |
Severance Costs |  | $ 122.0 |
Severance Settlement | $ 111.0 |  |
Remaining Balance of Severance Costs | 11.0 |  | $ 11.0
Number of Eligible Employees |  | 7,400 |
Total Number of Employees |  | 16,800 |
Minimum Net Actuarial Loss [Member] |  |  |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) |  |  | 75.0
Settlement Threshold [Member] |  |  |
Defined Benefit Plan, Benefit Obligation | 306.0 |  | 306.0
Maximum Net Actuarial Loss [Member] |  |  |
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) |  |  | 100.0
AEP Texas Inc. [Member] |  |  |
Severance Costs |  | $ 19.8 |
Severance Settlement | 19.5 |  |
Remaining Balance of Severance Costs | 0.3 |  | 0.3
AEP Transmission Co [Member] |  |  |
Severance Costs |  | 10.7 |
Severance Settlement | 10.7 |  |
Remaining Balance of Severance Costs | 0.0 |  | 0.0
Appalachian Power Co [Member] |  |  |
Severance Costs |  | 26.5 |
Severance Settlement | 24.7 |  |
Remaining Balance of Severance Costs | 1.8 |  | 1.8
Indiana Michigan Power Co [Member] |  |  |
Severance Costs |  | 14.8 |
Severance Settlement | 14.3 |  |
Remaining Balance of Severance Costs | 0.5 |  | 0.5
Ohio Power Co [Member] |  |  |
Severance Costs |  | 14.8 |
Severance Settlement | 14.4 |  |
Remaining Balance of Severance Costs | 0.4 |  | 0.4
Public Service Co Of Oklahoma [Member] |  |  |
Severance Costs |  | 10.1 |
Severance Settlement | 9.8 |  |
Remaining Balance of Severance Costs | 0.3 |  | 0.3
Southwestern Electric Power Co [Member] |  |  |
Severance Costs |  | $ 16.9 |
Severance Settlement | 15.9 |  |
Remaining Balance of Severance Costs | $ 1.0 |  | $ 1.0

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