v3.26.1
Document and Entity Information
Jul. 07, 2026
Entity Information [Line Items]  
Entity Central Index Key 0001721781
Amendment Flag false
Document Type 8-K
Document Period End Date Jul. 07, 2026
Entity Registrant Name AEP TEXAS INC.
Entity Incorporation, State or Country Code DE
Entity File Number 333-221643
Entity Tax Identification Number 51-0007707
Entity Address, Address Line One 1 Riverside Plaza,
Entity Address, City or Town Columbus,
Entity Address, State or Province OH
Entity Address, Postal Zip Code 43215
City Area Code (614)
Local Phone Number 716-1000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false