Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Total	AEP Texas Inc. [Member]	AEP Transmission Co [Member]	Appalachian Power Co [Member]	Indiana Michigan Power Co [Member]	Ohio Power Co [Member]	Public Service Co Of Oklahoma [Member]	Southwestern Electric Power Co [Member]	Common Stock [Member]	Common Stock [Member] Appalachian Power Co [Member]	Common Stock [Member] Indiana Michigan Power Co [Member]	Common Stock [Member] Ohio Power Co [Member]	Common Stock [Member] Public Service Co Of Oklahoma [Member]	Common Stock [Member] Southwestern Electric Power Co [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] AEP Texas Inc. [Member]	Additional Paid-in Capital [Member] AEP Transmission Co [Member]	Additional Paid-in Capital [Member] Appalachian Power Co [Member]	Additional Paid-in Capital [Member] Indiana Michigan Power Co [Member]	Additional Paid-in Capital [Member] Ohio Power Co [Member]	Additional Paid-in Capital [Member] Public Service Co Of Oklahoma [Member]	Additional Paid-in Capital [Member] Southwestern Electric Power Co [Member]	Retained Earnings [Member]		Retained Earnings [Member] AEP Texas Inc. [Member]	Retained Earnings [Member] AEP Transmission Co [Member]	Retained Earnings [Member] Appalachian Power Co [Member]	Retained Earnings [Member] Indiana Michigan Power Co [Member]	Retained Earnings [Member] Ohio Power Co [Member]	Retained Earnings [Member] Public Service Co Of Oklahoma [Member]	Retained Earnings [Member] Southwestern Electric Power Co [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Other Comprehensive Income [Member] AEP Texas Inc. [Member]	Accumulated Other Comprehensive Income [Member] Appalachian Power Co [Member]	Accumulated Other Comprehensive Income [Member] Indiana Michigan Power Co [Member]	Accumulated Other Comprehensive Income [Member] Public Service Co Of Oklahoma [Member]	Accumulated Other Comprehensive Income [Member] Southwestern Electric Power Co [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member] Southwestern Electric Power Co [Member]	Dry Lake Solar Project [Member]	Dry Lake Solar Project [Member] Noncontrolling Interests [Member]	Competitive Contracted Renewables	Competitive Contracted Renewables Noncontrolling Interests [Member]
TOTAL MEMBER'S EQUITY			$ 4,712.9														$ 2,765.6									$ 1,947.3
Common Stock, Dividends, Per Share, Declared	$ 3.00
Beginning Balance at Dec. 31, 2020	$ 20,774.5	$ 3,206.0		$ 4,344.3	$ 2,749.2	$ 2,692.7	$ 1,545.6	$ 2,627.7	$ 3,359.3	$ 260.4	$ 56.6	$ 321.2	$ 157.2	$ 0.1	$ 6,588.9	$ 1,457.9		$ 1,828.7	$ 980.9	$ 838.8	$ 414.0	$ 812.2	$ 10,687.8		$ 1,757.0		$ 2,248.0	$ 1,718.7	$ 1,532.7	$ 974.3	$ 1,811.9	$ (85.1)	$ (8.9)	$ 7.2	$ (7.0)	$ 0.1	$ 1.9	$ 223.6	$ 1.6
Beginning Balance, Shares at Dec. 31, 2020	516,808,354								516,800,000
Issuance of Common Stock, Value	$ 600.5								$ 49.4						551.1
Issuance of Common Stock, Shares	7,607,821								7,600,000
Capital Contributions from Member		96.0	184.0				625.0	280.0								96.0	184.0				625.0	280.0
Common Stock Dividends	$ (1,519.5)																						(1,507.7)	[1]
Common Stock Dividends				(62.5)	(250.0)	(100.0)	(20.0)																				(62.5)	(250.0)	(100.0)	(20.0)
Common Stock Dividends - Nonaffiliated								(4.8)																														(11.8)	(4.8)
Forward Equity Purchase Contracts Included in Current and Noncurrent Liabilities as of December 31,	47.8														32.6								(1.1)															16.3
Acquisition																																								$ 18.9	$ 18.9
Net Income (Loss)	2,488.1							239.0															2,488.1								239.0
Net Income (Loss) Attributable to Noncontrolling Interests	0.0							3.1																														0.0	3.1
Net Income (Loss)	2,488.1	289.8	591.7	348.9	279.8	253.6	141.1	242.1																	289.8	591.7	348.9	279.8	253.6	141.1
Other Comprehensive Income (Loss)	269.9	2.4		17.2	5.7		(0.1)	4.8																								269.9	2.4	17.2	5.7	(0.1)	4.8
Ending Balance at Dec. 31, 2021	$ 22,680.2	3,594.2		4,647.9	2,784.7	2,846.3	2,291.6	3,149.8	$ 3,408.7	260.4	56.6	321.2	157.2	0.1	7,172.6	1,553.9		1,828.7	980.9	838.8	1,039.0	1,092.2	11,667.1		2,046.8		2,534.4	1,748.5	1,686.3	1,095.4	2,050.9	184.8	(6.5)	24.4	(1.3)	0.0	6.7	247.0	(0.1)
Ending Balance, Shares at Dec. 31, 2021	524,416,175								524,400,000
Dividends Paid to Member			(112.5)	(62.5)	(250.0)	(100.0)	(20.0)	0.0																		(112.5)
Capital Contributions from Member		96.0	184.0	0.0	0.0	0.0	625.0	280.0
TOTAL MEMBER'S EQUITY			5,376.1														2,949.6									2,426.5
Common Stock, Dividends, Per Share, Declared	$ 3.17
Issuance of Common Stock, Value	$ 826.5								$ 4.4						822.1
Issuance of Common Stock, Shares	683,146								700,000
Capital Contributions from Member		4.3	72.7		7.9	1.0	3.6	350.0								4.3	72.7		7.9	1.0	3.6	350.0
Common Stock Dividends	$ (1,645.2)																						(1,628.7)	[1]
Common Stock Dividends				(37.5)	(110.0)	(45.0)	(45.0)	(105.0)																			(37.5)	(110.0)	(45.0)	(45.0)	(105.0)
Common Stock Dividends - Nonaffiliated								(3.4)																														(16.5)	(3.4)
Forward Equity Purchase Contracts Included in Current and Noncurrent Liabilities as of December 31,	56.4														56.3																							0.1
Gain (Loss) on Disposition Assets	(116.3)
Net Income (Loss)	2,307.2							290.1															2,307.2								290.1
Net Income (Loss) Attributable to Noncontrolling Interests	(1.6)							4.2																														(1.6)	4.2
Net Income (Loss)	2,305.6	307.9	594.2	394.2	324.7	287.8	167.6	294.3																	307.9	594.2	394.2	324.7	287.8	167.6
Other Comprehensive Income (Loss)	(101.1)	(2.1)		(29.2)	1.0		1.3	(10.9)																								(101.1)	(2.1)	(29.2)	1.0	1.3	(10.9)
Ending Balance at Dec. 31, 2022	$ 24,122.4	3,904.3		4,975.4	3,008.3	3,088.1	$ 2,419.1	3,674.8	$ 3,413.1	260.4	56.6	321.2	157.2	0.1	8,051.0	1,558.2		1,828.7	988.8	837.8	1,042.6	1,442.2	12,345.6		2,354.7		2,891.1	1,963.2	1,929.1	1,218.0	2,236.0	83.7	(8.6)	(4.8)	(0.3)	1.3	(4.2)	229.0	0.7
Ending Balance, Shares at Dec. 31, 2022	525,099,321						10,482,000		525,100,000
Dividends Paid to Member			(170.0)	(37.5)	(110.0)	(45.0)	$ (45.0)	(105.0)																		(170.0)
Return of Capital to Parent Equity Statement						(2.0)														(2.0)
Capital Contributions from Member		4.3	72.7	0.0	7.9	1.0	3.6	350.0
TOTAL MEMBER'S EQUITY			5,873.0														3,022.3									2,850.7
Common Stock, Dividends, Per Share, Declared	$ 3.37
Issuance of Common Stock, Value	$ 999.6								$ 14.8						984.8
Issuance of Common Stock, Shares	2,269,836								2,300,000
Capital Contributions from Member		527.0	29.7		8.8	175.0	0.6	50.0								527.0	29.7		8.8	175.0	0.6	50.0
Common Stock Dividends	$ (1,760.4)																						(1,752.3)	[1]
Common Stock Dividends					(212.5)	(20.0)	(52.5)	(175.0)																				(212.5)	(20.0)	(52.5)	(175.0)
Common Stock Dividends - Nonaffiliated								(4.0)																														(8.1)	(4.0)
Forward Equity Purchase Contracts Included in Current and Noncurrent Liabilities as of December 31,	37.3														38.1								(1.0)															0.2
Gain (Loss) on Disposition Assets																																										$ (186.4)	$ (186.4)
Net Income (Loss)	2,208.1							220.3															2,208.1								220.3
Net Income (Loss) Attributable to Noncontrolling Interests	4.5							3.5																														4.5	3.5
Net Income (Loss)	2,212.6	370.4	614.2	294.4	335.9	328.2	208.8	223.8																	370.4	614.2	294.4	335.9	328.2	208.8
Other Comprehensive Income (Loss)	(139.2)	0.0		1.1	(0.3)		(1.5)	0.8																								(139.2)		1.1	(0.3)	(1.5)	0.8
Ending Balance at Dec. 31, 2023	$ 25,285.9	4,796.1		5,276.7	3,140.2	3,571.3	$ 2,570.6	3,770.4	$ 3,427.9	$ 260.4	$ 56.6	$ 321.2	$ 157.2	$ 0.1	$ 9,073.9	2,079.6		1,834.5	$ 997.6	$ 1,012.8	1,039.3	$ 1,492.2	$ 12,800.4		$ 2,725.1		$ 3,185.5	$ 2,086.6	$ 2,237.3	$ 1,374.3	$ 2,281.3	$ (55.5)	$ (8.6)	$ (3.7)	$ (0.6)	$ (0.2)	$ (3.4)	$ 39.2	$ 0.2
Ending Balance, Shares at Dec. 31, 2023	527,369,157						10,482,000		527,400,000
Dividends Paid to Member			(175.0)	0.0	(212.5)	(20.0)	$ (52.5)	(175.0)																		(175.0)
Return of Capital to Parent Equity Statement		(5.6)	(8.6)	(0.7)			(3.9)									$ (5.6)	(8.6)	(0.7)			$ (3.9)
Capital Contributions from Member		$ 527.0	29.7	$ 6.5	$ 8.8	$ 175.0	$ 0.6	$ 50.0										$ 6.5
TOTAL MEMBER'S EQUITY			$ 6,333.3														$ 3,043.4									$ 3,289.9

[1] (a)    Cash dividends declared per AEP common share were $3.37, $3.17 and $3.00 for the years ended December 31, 2023, 2022 and 2021, respectively.