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v3.25.1

RATE MATTERS - ETT Rate Matters (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 30, 2025 | Jan. 31, 2025 | Mar. 31, 2025
ETT Interim Transmission Rates | ETT |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Aep share of ett cumulative revenues subject to review |  |  | $ 1,900
ETT Interim Transmission Rates | ETT |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Subsidiary, ownership percentage, parent |  |  | 50.00%
2025 ETT Base Rate Case |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested annual base rate increase |  | $ 57 |
Requested return on equity |  | 10.60% |
Requested debt capital structure |  | 55.00% |
Requested equity capital structure |  | 45.00% |
2025 ETT Base Rate Case | Subsequent Event |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Requested rate increase related to depreciation rates | $ 37 |  |
Requested rate increase related to ROE and capital structure | $ 32 |  |

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- Definition AEP's share of ETT's cumulative revenues, subject to review, based upon interim rate increases. + References No definition available. + Details
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- Definition Public Utilities, Requested Rate Increase (Decrease), Amount Related To Proposed ROE And Capital Structure + References No definition available. + Details
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- Details
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