RATE MATTERS - ETT Rate Matters (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
Jan. 31, 2025	Dec. 31, 2024
ETT Interim Transmission Rates
Public Utilities, General Disclosures [Line Items]
Parent ownership interest in ett		50.00%
Aep share of ett cumulative revenues subject to review		$ 1,800
2025 ETT Base Rate Case \| Subsequent Event
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%

- Definition

AEP's share of ETT's cumulative revenues, subject to review, based upon interim rate increases received from 2009 through 2015.

+ References

No definition available.

+ Details

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- Definition

Parents equity ownership interest in ETT.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Percentage of public utility's requested debt to capital, including debt and equity.

+ References

No definition available.

+ Details

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- Definition

Percentage of public utility's requested equity to capital, including debt and equity.

+ References

No definition available.

+ Details

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- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

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- Definition

Percentage of public utility's requested return on equity.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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