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INCOME TAXES - Operating Loss Carryforwards (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | $ 110.3
OHIO POWER COMPANY |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 2.7
PUBLIC SERVICE COMPANY OF OKLAHOMA |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 27.8
SOUTHWESTERN ELECTRIC POWER COMPANY |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 36.1
Arkansas |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 273.9
Arkansas | SOUTHWESTERN ELECTRIC POWER COMPANY |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 273.5
Colorado |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 70.5
Illinois |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 53.9
Kentucky |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 186.7
Louisiana |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 644.8
Louisiana | SOUTHWESTERN ELECTRIC POWER COMPANY |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 634.5
Michigan |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 30.9
Ohio Municipal |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 2,155.8
Ohio Municipal | OHIO POWER COMPANY |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 93.7
Oklahoma |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 889.8
Oklahoma | PUBLIC SERVICE COMPANY OF OKLAHOMA |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 1,010.0
Pennsylvania |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | 61.2
Tennessee |
Effective Income Tax Rate Reconciliation [Line Items] |
State net income tax operating loss carryforward | $ 46.1

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