CONSOLIDATED STATEMENTS OF CHANGES IN MEMBER’S EQUITY - AEP Transmission Holdco - AEP TRANSMISSION COMPANY, LLC - USD ($) $ in Millions	Total	Paid-in Capital	Retained Earnings
Beginning balance at Dec. 31, 2021	$ 5,376.1	$ 2,949.6	$ 2,426.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Member	72.7	72.7
Dividends Paid to Member	(170.0)		(170.0)
Net Income	594.2		594.2
Ending balance at Dec. 31, 2022	5,873.0	3,022.3	2,850.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Member	29.7	29.7
Return of Capital to Member	(8.6)	(8.6)
Dividends Paid to Member	(175.0)		(175.0)
Net Income	614.2		614.2
Ending balance at Dec. 31, 2023	6,333.3	3,043.4	3,289.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital Contribution from Member	61.7	61.7
Return of Capital to Member	(4.5)	(4.5)
Dividends Paid to Member	(128.0)		(128.0)
Net Income	688.4		688.4
Ending balance at Dec. 31, 2024	$ 6,950.9	$ 3,100.6	$ 3,850.3