CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDER’S EQUITY - OPCo - USD ($) $ in Millions	Total	Retained Earnings		OPCo	OPCo Common Stock	OPCo Paid-in Capital	OPCo Retained Earnings
Beginning balance at Dec. 31, 2023				$ 3,571.3	$ 321.2	$ 1,012.8	$ 2,237.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock Dividends	$ (466.9)	$ (465.5)	[1]
Net Income				70.6			70.6
Ending balance at Mar. 31, 2024				3,641.9	321.2	1,012.8	2,307.9
Beginning balance at Dec. 31, 2023				3,571.3	321.2	1,012.8	2,237.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income				201.7
Ending balance at Sep. 30, 2024				3,773.8	321.2	1,013.6	2,439.0
Beginning balance at Mar. 31, 2024				3,641.9	321.2	1,012.8	2,307.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock Dividends	(469.1)	(467.0)	[1]
Net Income				18.4			18.4
Ending balance at Jun. 30, 2024				3,660.3	321.2	1,012.8	2,326.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Parent				0.8		0.8
Common Stock Dividends	(471.4)	(470.2)	[1]
Net Income				112.7			112.7
Ending balance at Sep. 30, 2024				3,773.8	321.2	1,013.6	2,439.0
Beginning balance at Dec. 31, 2024	26,943.8			3,884.1	321.2	1,020.0	2,542.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock Dividends	(501.0)	(500.0)	[2]	(46.0)			(46.0)
Net Income				63.0			63.0
Ending balance at Mar. 31, 2025				3,901.1	321.2	1,020.0	2,559.9
Beginning balance at Dec. 31, 2024	26,943.8			3,884.1	321.2	1,020.0	2,542.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income				266.7
Ending balance at Sep. 30, 2025	30,389.3			4,081.6	321.2	1,021.8	2,738.6
Beginning balance at Mar. 31, 2025				3,901.1	321.2	1,020.0	2,559.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Parent				1.8		1.8
Common Stock Dividends	(499.5)	(498.5)	[2]	(25.0)			(25.0)
Net Income				102.8			102.8
Ending balance at Jun. 30, 2025				3,980.7	321.2	1,021.8	2,637.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock Dividends	(499.4)	$ (499.4)	[2]
Net Income				100.9			100.9
Ending balance at Sep. 30, 2025	$ 30,389.3			$ 4,081.6	$ 321.2	$ 1,021.8	$ 2,738.6

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

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