Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Revenues
Revenue from Contract with Customers	$ 18,982.3		$ 19,639.5		$ 16,792.0
TOTAL REVENUES	18,982.3		19,639.5		16,792.0
Expenses
Other Operation	2,810.5		2,878.1		2,547.7
Maintenance	1,276.3		1,249.4		1,121.8
Asset Impairments and Other Related Charges	85.6		48.8		11.6
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	0.0		(37.0)		0.0
Gain (Loss) on Disposition Assets			(116.3)
Depreciation and Amortization	3,090.4		3,202.8		2,825.7
Taxes Other Than Income Taxes	1,492.3		1,469.8		1,407.6
TOTAL EXPENSES	15,426.1		16,156.8		13,380.7
OPERATING INCOME (LOSS)	3,556.2		3,482.7		3,411.3
Other Income (Expense):
Other Income	63.4		11.6		41.4
Allowance for Equity Funds Used During Construction	174.9		133.7		139.7
Non-Service Cost Components of Net Periodic Benefit Cost	221.1		188.5		118.6
Interest Expense	(1,806.9)		(1,396.1)		(1,199.1)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	2,208.7		2,420.4		2,511.9
Income Tax Expense (Benefit)	54.6		5.4		115.5
Equity Earnings (Loss) of Unconsolidated Subsidiaries	58.5		(109.4)		91.7
Net Income (Loss)	2,212.6		2,305.6		2,488.1
Net Income Attributable to Noncontrolling Interests	4.5		(1.6)		0.0
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 2,208.1		$ 2,307.2		$ 2,488.1
Earnings Per Share
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING	518,903,682		511,841,946		500,522,177
Total Basic Earnings (Loss) per Share Attributable to AEP Common Shareholders	$ 4.26		$ 4.51		$ 4.97
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING	520,206,258		513,484,609		501,784,032
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 4.24		$ 4.49		$ 4.96
Competitive Contracted Renewable Portfolio
Expenses
Gain (Loss) on Disposition Assets	$ 92.7		$ 0.0		$ 0.0
Kentucky Operations [Member]
Expenses
Asset Impairments and Other Related Charges	0.0		363.3		0.0
Mineral Rights
Expenses
Gain (Loss) on Disposition Assets	0.0		(116.3)		0.0
Related Party
Revenues
Revenue from Contract with Customers	0.0		0.0		0.0
Vertically Integrated Utilities [Member]
Revenues
Revenue from Contract with Customers	11,303.7		11,292.8		9,852.2
Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contract with Customers	5,677.2		5,489.6		4,464.1
Generation and Marketing Revenues [Member]
Revenues
Revenue from Contract with Customers	1,543.3		2,448.9		2,108.3
Other Revenues [Member]
Revenues
Revenue from Contract with Customers	458.1		408.2		367.4
TOTAL REVENUES	(355.4)	[1],[2]	360.3	[3],[4]	227.6	[5],[6]
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	6,578.3		7,097.9		5,466.3
AEP Texas Inc. [Member]
Revenues
Revenue from Contract with Customers	1,906.1		1,848.0		1,587.7
TOTAL REVENUES	1,901.9		1,846.8		1,593.8
Expenses
Other Operation	541.6		594.2		489.5
Maintenance	91.9		93.5		86.2
Depreciation and Amortization	468.5		452.4		387.0
Taxes Other Than Income Taxes	160.8		157.5		155.1
TOTAL EXPENSES	1,262.8		1,297.6		1,117.8
OPERATING INCOME (LOSS)	639.1		549.2		476.0
Other Income (Expense):
Interest Income	2.3		3.6		0.8
Allowance for Equity Funds Used During Construction	28.4		19.7		21.5
Non-Service Cost Components of Net Periodic Benefit Cost	19.2		16.7		11.1
Interest Expense	(232.7)		(208.7)		(176.5)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	456.3		380.5		332.9
Income Tax Expense (Benefit)	85.9		72.6		43.1
Net Income (Loss)	370.4		307.9		289.8
AEP Texas Inc. [Member] | Related Party
Revenues
Revenue from Contract with Customers	4.9		3.5		3.9
AEP Texas Inc. [Member] | Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contract with Customers	1,892.0		1,839.7		1,586.4
AEP Texas Inc. [Member] | Other Revenues [Member]
Revenues
Revenue from Contract with Customers	5.0		3.6		3.5
TOTAL REVENUES	0.0	[7]	0.0	[8]	0.0	[9]
AEP Transmission Co [Member]
Revenues
Revenue from Contract with Customers	1,720.6		1,651.7		1,410.9
TOTAL REVENUES	1,672.0		1,624.5		1,469.3
Expenses
Other Operation	109.0		136.3		105.5
Maintenance	20.4		17.2		18.4
Depreciation and Amortization	393.8		346.2		297.3
Taxes Other Than Income Taxes	283.2		271.1		238.8
TOTAL EXPENSES	806.4		770.8		660.0
OPERATING INCOME (LOSS)	865.6		853.7		809.3
Other Income (Expense):
Interest Income	7.0		1.6		0.5
Allowance for Equity Funds Used During Construction	83.2		70.7		67.2
Interest Expense	(194.5)		(162.7)		(141.2)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	761.3		763.3		735.8
Income Tax Expense (Benefit)	147.1		169.1		144.1
Net Income (Loss)	614.2		594.2		591.7
Earnings Per Share
Provision for Refund-Affiliated	(145.6)		(70.7)		(17.6)
Provision for Refund-Nonaffiliated	(9.1)		(14.2)		(2.4)
AEP Transmission Co [Member] | Related Party
Revenues
Revenue from Contract with Customers	1,463.4		1,354.5		1,171.5
AEP Transmission Co [Member] | Transmission [Member]
Revenues
Revenue from Contract with Customers	363.3		354.9		317.8
AEP Transmission Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contract with Customers			(0.2)		0.3
TOTAL REVENUES	0.0	[7]	0.0	[8]	0.0	[9]
Appalachian Power Co [Member]
Revenues
Revenue from Contract with Customers	3,740.6		3,520.7		3,092.9
TOTAL REVENUES	3,720.7		3,519.9		3,105.2
Expenses
Other Operation	748.4		724.1		610.0
Maintenance	271.7		297.8		265.5
Asset Impairments and Other Related Charges	0.0		24.9		0.0
Establishment of 2017-2019 Virginia Triennial Review Regulatory Asset	0.0		(37.0)		0.0
Depreciation and Amortization	571.9		575.9		546.2
Taxes Other Than Income Taxes	163.1		158.2		154.2
TOTAL EXPENSES	3,189.7		2,917.8		2,555.8
OPERATING INCOME (LOSS)	531.0		602.1		549.4
Other Income (Expense):
Interest Income	2.8		3.5		1.0
Allowance for Equity Funds Used During Construction	11.9		11.7		15.6
Non-Service Cost Components of Net Periodic Benefit Cost	32.5		29.0		19.0
Interest Expense	(269.6)		(233.9)		(214.0)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	308.6		412.4		371.0
Income Tax Expense (Benefit)	14.2		18.2		22.1
Net Income (Loss)	294.4		394.2		348.9
Appalachian Power Co [Member] | Related Party
Revenues
Revenue from Contract with Customers	239.3		256.1		197.9
Appalachian Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contract with Customers	3,464.1		3,245.5		2,895.5
Appalachian Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contract with Customers	17.3		18.3		11.8
TOTAL REVENUES	0.2	[7]	0.5	[8]	0.0	[9]
Appalachian Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	1,434.6		1,173.9		979.9
Indiana Michigan Power Co [Member]
Revenues
Revenue from Contract with Customers	2,522.3		2,659.7		2,330.7
TOTAL REVENUES	2,535.9		2,669.6		2,326.7
Expenses
Other Operation	662.8		621.0		645.2
Maintenance	238.7		227.2		210.0
Depreciation and Amortization	470.0		527.2		446.0
Taxes Other Than Income Taxes	84.2		97.0		110.8
TOTAL EXPENSES	2,048.2		2,249.7		1,968.8
OPERATING INCOME (LOSS)	487.7		419.9		357.9
Other Income (Expense):
Other Income	12.5		9.3		11.7
Allowance for Equity Funds Used During Construction	10.9		9.8		12.8
Non-Service Cost Components of Net Periodic Benefit Cost	31.0		24.9		16.4
Interest Expense	(136.7)		(125.2)		(116.8)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	394.5		328.9		269.2
Income Tax Expense (Benefit)	58.6		4.2		(10.6)
Net Income (Loss)	335.9		324.7		279.8
Indiana Michigan Power Co [Member] | Related Party
Revenues
Revenue from Contract with Customers	9.3		17.8		3.8
Provision for Refund	(10.5)		(2.5)		0.0
Expenses
Purchased Electricity from AEP Affiliates	181.2		241.8		217.9
Indiana Michigan Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contract with Customers	2,465.8		2,588.3		2,261.2
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contract with Customers	12.3		11.7		7.7
TOTAL REVENUES	24.5	[7]	(0.1)	[8]	0.0	[9]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Revenues
Revenue from Contract with Customers	59.0		54.3		54.0
Indiana Michigan Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	411.3		535.5		338.9
Ohio Power Co [Member]
Revenues
Revenue from Contract with Customers	3,802.8		3,672.1		2,837.5
TOTAL REVENUES	3,811.4		3,665.1		2,899.1
Expenses
Purchased Electricity from AEP Affiliates	86.8		9.8		51.9
Other Operation	1,091.7		982.0		836.8
Maintenance	211.5		185.5		158.2
Depreciation and Amortization	316.2		294.3		303.3
Taxes Other Than Income Taxes	507.3		502.4		485.7
TOTAL EXPENSES	3,341.5		3,251.4		2,513.9
OPERATING INCOME (LOSS)	469.9		413.7		385.2
Other Income (Expense):
Other Income	0.4		1.3		1.8
Allowance for Equity Funds Used During Construction	17.1		13.9		10.8
Non-Service Cost Components of Net Periodic Benefit Cost	26.0		22.1		14.6
Interest Expense	(130.9)		(119.6)		(124.4)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	382.5		331.4		288.0
Income Tax Expense (Benefit)	54.3		44.2		34.4
Equity Earnings (Loss) of Unconsolidated Subsidiaries	0.0		0.6		0.0
Net Income (Loss)	328.2		287.8		253.6
Ohio Power Co [Member] | Related Party
Revenues
Revenue from Contract with Customers	31.1		18.8		24.8
Ohio Power Co [Member] | Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contract with Customers	3,768.0		3,635.3		2,863.7
Ohio Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contract with Customers	12.3		11.0		10.6
TOTAL REVENUES	23.9	[7]	18.6	[8]	19.0	[9]
Ohio Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	1,128.0		1,277.4		678.0
Public Service Co Of Oklahoma [Member]
Revenues
Revenue from Contract with Customers	1,976.6		1,875.7		1,474.3
TOTAL REVENUES	1,977.0		1,874.7		1,474.4
Expenses
Other Operation	355.8		400.4		353.8
Maintenance	112.0		114.4		97.2
Depreciation and Amortization	255.5		230.1		196.6
Taxes Other Than Income Taxes	64.1		57.5		49.6
TOTAL EXPENSES	1,742.7		1,693.9		1,281.5
OPERATING INCOME (LOSS)	234.3		180.8		192.9
Other Income (Expense):
Interest Income	1.8		7.4		4.3
Allowance for Equity Funds Used During Construction	8.4		1.5		2.4
Non-Service Cost Components of Net Periodic Benefit Cost	14.3		12.5		8.5
Interest Expense	(103.6)		(83.8)		(62.9)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	155.2		118.4		145.2
Income Tax Expense (Benefit)	(53.6)		(49.2)		4.1
Net Income (Loss)	208.8		167.6		141.1
Public Service Co Of Oklahoma [Member] | Related Party
Revenues
Revenue from Contract with Customers	1.2		2.9		4.2
Public Service Co Of Oklahoma [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contract with Customers	1,968.4		1,865.6		1,465.3
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Revenues
Revenue from Contract with Customers	7.4		6.2		4.9
TOTAL REVENUES	(0.1)	[7]	0.0	[8]	0.0	[9]
Public Service Co Of Oklahoma [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation
Expenses
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	955.3		891.5		584.3
Southwestern Electric Power Co [Member]
Revenues
Revenue from Contract with Customers	2,192.1		2,283.2		2,126.0
Provision for Refund	(34.8)		(5.6)		(0.4)
TOTAL REVENUES	2,182.8		2,284.4		2,131.8
Expenses
Other Operation	360.5		424.7		360.3
Maintenance	159.4		148.6		136.7
Asset Impairments and Other Related Charges	85.6		0.0		11.6
Depreciation and Amortization	342.8		324.8		295.0
Taxes Other Than Income Taxes	135.1		126.8		117.7
TOTAL EXPENSES	1,890.5		1,914.4		1,792.3
OPERATING INCOME (LOSS)	292.3		370.0		339.5
Other Income (Expense):
Interest Income	18.9		17.7		9.2
Allowance for Equity Funds Used During Construction	11.5		4.9		7.0
Non-Service Cost Components of Net Periodic Benefit Cost	13.6		12.5		8.3
Interest Expense	(147.2)		(137.4)		(125.9)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	189.1		267.7		238.1
Income Tax Expense (Benefit)	(33.3)		(25.2)		(0.6)
Equity Earnings (Loss) of Unconsolidated Subsidiaries	1.4		1.4		3.4
Net Income (Loss)	223.8		294.3		242.1
Net Income Attributable to Noncontrolling Interests	3.5		4.2		3.1
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	220.3		290.1		239.0
Southwestern Electric Power Co [Member] | Related Party
Revenues
Revenue from Contract with Customers	81.6		59.5		41.4
Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contract with Customers	2,133.6		2,228.6		2,088.9
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contract with Customers	2.4		1.9		1.9
TOTAL REVENUES	0.1	[7]	0.0	[8]	0.0	[9]
Southwestern Electric Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	$ 807.1		$ 889.5		$ 871.0

[1] Amounts include affiliated and nonaffiliated revenues.

[2] Generation & Marketing includes economic hedge activity.

[3] Amounts include affiliated and nonaffiliated revenues.

[4] Generation & Marketing includes economic hedge activity.

[5] Amounts include affiliated and nonaffiliated revenues.

[6] Generation & Marketing includes economic hedge activity.

[7] Amounts include affiliated and nonaffiliated revenues.

[8] Amounts include affiliated and nonaffiliated revenues.

[9] Amounts include affiliated and nonaffiliated revenues.