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VOLUNTARY SEVERANCE PROGRAM - 2024 Voluntary Severance Program (Details) $ in Millions | 3 Months Ended
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Jun. 30, 2024 USD ($)
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | $ 122.0
AEP Texas |
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | 19.8
AEPTCo |
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | 10.7
APCo |
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | 26.5
I&M |
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | 14.8
OPCo |
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | 14.8
PSO |
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | 10.1
SWEPCo |
Restructuring Cost and Reserve [Line Items] |
Severance Expense Incurred | $ 16.9

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