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v3.25.1

RATE MATTERS - Net Book Value (Details) - Generating Units Probable of Abandonment - SWEPCo $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 USD ($)
Northeastern Plant, Unit 3 |
Public Utilities, General Disclosures [Line Items] |
Net book value | $ 89.1
Accelerated Depreciation Regulatory Asset | 196.9
Cost of Removal Regulatory Liability | 21.0
Depreciation | 16.6
Welsh Plant, Units 1 and 3 |
Public Utilities, General Disclosures [Line Items] |
Net book value | 303.8
Accelerated Depreciation Regulatory Asset | 180.5
Cost of Removal Regulatory Liability | 57.8
Depreciation | $ 44.9

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