v3.23.1

Cover	12 Months Ended
Cover	Dec. 31, 2022 USD ($) shares
Entity Information [Line Items]
Entity File Number	333-179092-01
Entity Central Index Key	0001539816
Document Period End Date	Dec. 31, 2022
Document Type	10-K
Entity Registrant Name	AEP Texas Central Transition Funding III LLC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-4223169
Entity Public Float \| $	$ 0
Entity Common Stock, Shares Outstanding \| shares	0
Entity Address, Address Line One	539 N. Carancahua Street
Entity Address, Address Line Two	Suite 1700
Entity Address, State or Province	TX
Entity Address, City or Town	Corpus Christi,
Entity Address, Postal Zip Code	78401
City Area Code	(361)
Local Phone Number	881-5398
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Auditor Firm ID	238
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Columbus, Ohio
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Document Annual Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
AEP Texas Inc.
Entity Information [Line Items]
Entity File Number	333-179092
Entity Central Index Key	0001721781
Entity Registrant Name	AEP Texas Inc.
Entity Tax Identification Number	51-0007707

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AEP Texas Central Transition Funding III LLC 10-K