CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDER’S EQUITY - AEP Texas - USD ($) $ in Millions	Total	Accumulated Other Comprehensive Income (Loss)	AEP TEXAS INC.	AEP TEXAS INC. Paid-in Capital	AEP TEXAS INC. Retained Earnings	AEP TEXAS INC. Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2024			$ 4,885	$ 2,093	$ 2,795	$ (3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income			102		102
Other Comprehensive Loss	$ 24	$ 24	(1)			(1)
Ending balance at Mar. 31, 2025			4,986	2,093	2,897	(4)
Beginning balance at Dec. 31, 2025	31,138		5,826	2,546	3,283	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income			120		120
Other Comprehensive Loss	(14)	$ (14)
Ending balance at Mar. 31, 2026	$ 31,808		$ 5,946	$ 2,546	$ 3,403	$ (3)