RATE MATTERS - AEP Texas Rate Matters (Details) - AEP TEXAS INC. $ in Millions	3 Months Ended
Mar. 31, 2026 USD ($)
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase (decrease)	$ 159
Eligible costs deferred	$ 80

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.

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