CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDER’S EQUITY - AEP Texas - USD ($) $ in Millions	Total	Retained Earnings		Accumulated Other Comprehensive Income (Loss)	AEP Texas	AEP Texas Paid-in Capital	AEP Texas Retained Earnings	AEP Texas Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2023					$ 4,796.1	$ 2,079.6	$ 2,725.1	$ (8.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock Dividends	$ (466.9)	$ (465.5)	[1]
Net Income					79.7		79.7
Other Comprehensive Income (Loss)	(6.8)			$ (6.8)	3.9			3.9
Ending balance at Mar. 31, 2024					4,879.7	2,079.6	2,804.8	(4.7)
Beginning balance at Dec. 31, 2023					4,796.1	2,079.6	2,725.1	(8.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income					340.6
Other Comprehensive Income (Loss)	(31.4)			(31.4)	6.0
Ending balance at Sep. 30, 2024					4,993.6	2,080.5	2,915.7	(2.6)
Beginning balance at Mar. 31, 2024					4,879.7	2,079.6	2,804.8	(4.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Parent					1.6	1.6
Common Stock Dividends	(469.1)	(467.0)	[1]
Net Income					128.4		128.4
Other Comprehensive Income (Loss)	22.3			22.3	2.2			2.2
Ending balance at Jun. 30, 2024					5,011.9	2,081.2	2,933.2	(2.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Return of Capital to Parent					(0.7)	(0.7)
Common Stock Dividends	(471.4)	(470.2)	[1]		(150.0)		(150.0)
Net Income					132.5		132.5
Other Comprehensive Income (Loss)	(46.9)			(46.9)	(0.1)			(0.1)
Ending balance at Sep. 30, 2024					4,993.6	2,080.5	2,915.7	(2.6)
Beginning balance at Dec. 31, 2024	26,943.8				4,884.6	2,092.4	2,795.2	(3.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock Dividends	(501.0)	(500.0)	[2]
Net Income					101.6		101.6
Other Comprehensive Income (Loss)	23.4			23.4	(0.2)			(0.2)
Ending balance at Mar. 31, 2025					4,986.0	2,092.4	2,896.8	(3.2)
Beginning balance at Dec. 31, 2024	26,943.8				4,884.6	2,092.4	2,795.2	(3.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income					389.4
Other Comprehensive Income (Loss)	(24.7)			(24.7)	(0.5)
Ending balance at Sep. 30, 2025	30,389.3				5,724.4	2,543.3	3,184.6	(3.5)
Beginning balance at Mar. 31, 2025					4,986.0	2,092.4	2,896.8	(3.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Parent					250.5	250.5
Common Stock Dividends	(499.5)	(498.5)	[2]
Net Income					121.1		121.1
Other Comprehensive Income (Loss)	(32.9)			(32.9)	(0.2)			(0.2)
Ending balance at Jun. 30, 2025					5,357.4	2,342.9	3,017.9	(3.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Parent					200.4	200.4
Common Stock Dividends	(499.4)	$ (499.4)	[2]
Net Income					166.7		166.7
Other Comprehensive Income (Loss)	(15.2)			$ (15.2)	(0.1)			(0.1)
Ending balance at Sep. 30, 2025	$ 30,389.3				$ 5,724.4	$ 2,543.3	$ 3,184.6	$ (3.5)

[1] Cash dividends declared per AEP common share were $0.88.

[2] Cash dividends declared per AEP common share were $0.93.