Consolidated Statements of Income - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2024		Jun. 30, 2023		Jun. 30, 2024		Jun. 30, 2023
Revenues
Revenue from Contracts with Customers		$ 4,579.2		$ 4,372.5		$ 9,604.9		$ 9,063.4
TOTAL REVENUES		4,579.2		4,372.5		9,604.9		9,063.4
Expenses
Other Operation		817.3		631.2		1,579.6		1,311.2
Maintenance		351.5		340.0		669.0		657.3
Asset Impairments and Other Related Charges		142.5		0.0		142.5		0.0
Depreciation and Amortization		821.9		741.6		1,609.0		1,517.1
Taxes Other Than Income Taxes		393.6		360.4		804.0		755.3
TOTAL EXPENSES		3,895.3		3,497.8		7,748.4		7,483.9
OPERATING INCOME (LOSS)		683.9		874.7		1,856.5		1,579.5
Other Income (Expense):
Other Income		13.1		14.4		26.7		29.1
Allowance for Equity Funds Used During Construction		55.2		41.0		98.8		72.3
Non-Service Cost Components of Net Periodic Benefit Cost		37.4		55.2		82.5		110.7
Interest Expense		(465.6)		(460.0)		(901.2)		(875.7)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		324.0		525.3		1,163.3		915.9
Income Tax Expense (Benefit)		6.7		28.6		(135.2)		39.0
Equity Earnings (Loss) of Unconsolidated Subsidiaries		25.2		19.4		49.7		39.6
Net Income (Loss)		342.5		516.1		1,348.2		916.5
Net Income (Loss) Attributable to Noncontrolling Interests		2.2		(5.1)		4.8		(1.7)
Earnings Attributable to Common Shareholders		$ 340.3		$ 521.2		$ 1,343.4		$ 918.2
Earnings Per Share
Weighted Average Number of Basic AEP Common Shares Outstanding		528,898,816		514,879,144		527,725,426		514,529,837
Total Basic Earnings Per Share Attributable to AEP Common Shareholders		$ 0.64		$ 1.01		$ 2.55		$ 1.78
Weighted Average Number of Diluted AEP Common Shares Outstanding		530,140,990		516,242,919		528,868,693		515,922,446
Total Diluted Earnings Per Share Attributable to AEP Common Shareholders		$ 0.64		$ 1.01		$ 2.54		$ 1.78
Common Stock, Dividends Per Share, Declared		$ 0.88		$ 0.83
Acquisition Of Nuclear Fuel Included In Current Liabilities						$ 8.2		$ (36.0)
Cash Flow Hedges, Tax		$ 5.9		$ 9.3		4.3		(31.2)
Amortization of Pension and OPEB Deferred Costs, Tax		0.0		(0.8)		(0.2)		(5.1)
Competitive Contracted Renewable Portfolio
Expenses
Asset Impairments and Other Related Charges		0.0		0.0		0.0		112.0
Related Party
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		2,572.0		2,629.0		5,473.2		5,445.3
Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contracts with Customers		1,428.8		1,330.8		2,912.0		2,786.1
Generation and Marketing [Member]
Revenues
Revenue from Contracts with Customers		442.5		318.2		958.4		645.1
Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		135.9		94.5		261.3		186.9
TOTAL REVENUES		(42.8)	[1],[2]	(128.8)	[3],[4]	(103.6)	[5],[6]	(258.7)	[7],[8]
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		1,368.5		1,424.6		2,944.3		3,131.0
AEP Texas Inc. [Member]
Revenues
TOTAL REVENUES		539.6		461.2		1,006.0		890.7
Expenses
Other Operation		147.8		93.9		288.6		240.8
Maintenance		21.7		26.3		43.8		50.7
Depreciation and Amortization		124.9		114.9		241.6		225.9
Taxes Other Than Income Taxes		40.6		44.8		80.6		88.3
TOTAL EXPENSES		335.0		279.9		654.6		605.7
OPERATING INCOME (LOSS)		204.6		181.3		351.4		285.0
Other Income (Expense):
Interest Income		2.1		0.6		2.6		1.0
Allowance for Equity Funds Used During Construction		15.5		5.3		24.1		11.6
Non-Service Cost Components of Net Periodic Benefit Cost		3.4		4.8		7.1		9.6
Interest Expense		(59.3)		(56.3)		(120.8)		(113.2)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		166.3		135.7		264.4		194.0
Income Tax Expense (Benefit)		37.9		26.6		56.3		37.3
Net Income (Loss)		128.4		109.1		208.1		156.7
Earnings Per Share
Cash Flow Hedges, Tax		0.6		0.8		1.6		0.8
Amortization of Pension and OPEB Deferred Costs, Tax		0.0		0.0		0.0		(0.1)
AEP Texas Inc. [Member] | Related Party
Revenues
Revenue from Contracts with Customers		1.4		1.3		2.7		2.5
AEP Texas Inc. [Member] | Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contracts with Customers		537.7		459.4		1,000.7		887.1
AEP Texas Inc. [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		0.5		0.5		2.6		1.1
TOTAL REVENUES		0.0	[9]	0.0	[10]	0.0	[11]	0.0	[12]
AEP Transmission Co [Member]
Revenues
Provision for Refund Affiliated		(16.6)		(8.3)		(22.6)		(13.1)
Provision for Refund-Nonaffiliated		(0.3)		(2.8)		(1.7)		(3.8)
TOTAL REVENUES		475.2		444.9		958.0		886.5
Expenses
Other Operation		40.0		26.4		69.9		55.4
Maintenance		5.0		4.3		10.3		9.2
Depreciation and Amortization		106.7		96.4		212.6		191.6
Taxes Other Than Income Taxes		75.5		68.0		148.9		142.8
TOTAL EXPENSES		227.2		195.1		441.7		399.0
OPERATING INCOME (LOSS)		248.0		249.8		516.3		487.5
Other Income (Expense):
Interest Income		4.3		2.6		6.2		4.1
Allowance for Equity Funds Used During Construction		22.5		23.1		40.4		39.5
Interest Expense		(51.4)		(50.7)		(106.2)		(95.9)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		223.4		224.8		456.7		435.2
Income Tax Expense (Benefit)		47.7		49.1		99.8		96.8
Net Income (Loss)		175.7		175.7		356.9		338.4
Earnings Per Share
Revenues from Related Parties, Net of Provisions for Refund		377.8		357.5		761.2		710.1
AEP Transmission Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		394.4		365.8		783.8		723.2
AEP Transmission Co [Member] | AEPTCo Parent [Member]
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
TOTAL REVENUES		0.0		0.0		0.0		0.0
Other Income (Expense):
Net Income (Loss)	[13]	0.5		1.5		0.0		2.6
AEP Transmission Co [Member] | AEPTCo Parent [Member] | Related Party
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | State Transcos [Member]
Revenues
TOTAL REVENUES		475.2		444.9		958.0		886.5
Other Income (Expense):
Net Income (Loss)		175.2		174.2		356.9		335.8
AEP Transmission Co [Member] | State Transcos [Member] | Related Party
Revenues
Revenue from Contracts with Customers		377.8		357.5		761.2		710.1
AEP Transmission Co [Member] | Transmission [Member]
Revenues
Revenue from Contracts with Customers		97.3		90.2		195.7		180.2
Earnings Per Share
Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax		97.0		87.4		194.0		176.4
AEP Transmission Co [Member] | Transmission [Member] | State Transcos [Member]
Revenues
Revenue from Contracts with Customers		97.0		87.4		194.0		176.4
AEP Transmission Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		0.4		0.0		2.8		0.0
TOTAL REVENUES		0.0	[9]	0.0	[10]	0.0	[11]	0.0	[12]
Earnings Per Share
Revenue from Contract with Customers, Net of Provisions for Refund, Including Assessed Tax		0.4				2.8
AEP Transmission Co [Member] | Other Revenues [Member] | AEPTCo Parent [Member]
Revenues
Revenue from Contracts with Customers		0.0				0.0
AEP Transmission Co [Member] | Other Revenues [Member] | State Transcos [Member]
Revenues
Revenue from Contracts with Customers		0.4				2.8
Appalachian Power Co [Member]
Revenues
TOTAL REVENUES		910.2		826.5		2,003.2		1,814.2
Expenses
Other Operation		212.0		189.9		424.6		381.7
Maintenance		78.3		75.1		158.3		148.2
Depreciation and Amortization		145.7		138.1		295.5		281.1
Taxes Other Than Income Taxes		42.2		41.2		88.2		83.0
TOTAL EXPENSES		783.0		722.2		1,668.2		1,511.6
OPERATING INCOME (LOSS)		127.2		104.3		335.0		302.6
Other Income (Expense):
Interest Income		1.2		0.8		2.0		1.4
Allowance for Equity Funds Used During Construction		4.3		2.7		7.2		5.1
Non-Service Cost Components of Net Periodic Benefit Cost		6.4		8.2		13.5		16.3
Interest Expense		(68.1)		(66.9)		(136.2)		(132.2)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		71.0		49.1		221.5		193.2
Income Tax Expense (Benefit)		12.7		6.2		26.7		37.8
Net Income (Loss)		58.3		42.9		194.8		155.4
Earnings Per Share
Cash Flow Hedges, Tax		0.0		0.0		(0.1)		(0.1)
Amortization of Pension and OPEB Deferred Costs, Tax		0.0		(0.2)		(0.1)		(0.4)
Appalachian Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		54.8		61.1		117.9		130.7
Appalachian Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		851.7		762.5		1,876.0		1,677.0
Appalachian Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		3.7		2.9		9.3		6.5
TOTAL REVENUES		0.0	[9]	0.0	[10]	0.1	[11]	0.0	[12]
Appalachian Power Co [Member] | Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		304.8		277.9		701.6		617.6
Indiana Michigan Power Co [Member]
Revenues
TOTAL REVENUES		594.3		599.2		1,261.7		1,262.2
Expenses
Purchased Electricity from AEP Affiliates		44.5		37.1		106.0		82.2
Other Operation		190.3		170.1		368.5		339.8
Maintenance		63.2		57.1		115.6		115.7
Asset Impairments and Other Related Charges		13.4		0.0		13.4		0.0
Depreciation and Amortization		118.3		111.0		226.6		236.2
Taxes Other Than Income Taxes		24.6		20.6		47.9		40.1
TOTAL EXPENSES		540.4		489.8		1,086.7		1,007.1
OPERATING INCOME (LOSS)		53.9		109.4		175.0		255.1
Other Income (Expense):
Other Income		3.2		3.0		6.4		3.6
Allowance for Equity Funds Used During Construction						6.7		2.8
Non-Service Cost Components of Net Periodic Benefit Cost		6.5		7.7		13.2		15.7
Interest Expense		(37.0)		(35.8)		(63.2)		(69.0)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		26.6		84.3		131.4		205.4
Income Tax Expense (Benefit)		(8.6)		9.5		(48.8)		27.8
Net Income (Loss)		35.2		74.8		180.2		177.6
Earnings Per Share
Acquisition Of Nuclear Fuel Included In Current Liabilities						8.2		36.0
Cash Flow Hedges, Tax		0.1		0.0		0.1		(0.2)
Amortization of Pension and OPEB Deferred Costs, Tax		0.0		(0.1)		0.0		(0.6)
Indiana Michigan Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		2.1		1.9		3.9		3.1
Indiana Michigan Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		569.6		580.4		1,217.4		1,223.2
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		2.1		2.4		4.9		5.5
TOTAL REVENUES		4.4	[9]	0.0	[10]	(21.5)	[11]	0.0	[12]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Revenues
Revenue from Contracts with Customers		20.5		14.5		35.5		30.4
Indiana Michigan Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		86.1		93.9		208.7		193.1
Ohio Power Co [Member]
Revenues
TOTAL REVENUES		896.3		879.1		1,920.1		1,913.7
Expenses
Purchased Electricity from AEP Affiliates		25.5		11.6		72.1		11.6
Other Operation		283.8		265.4		577.0		539.2
Maintenance		67.1		51.2		128.4		95.5
Asset Impairments and Other Related Charges		52.9		0.0		52.9		0.0
Depreciation and Amortization		102.0		68.2		207.8		143.4
Taxes Other Than Income Taxes		137.3		114.2		288.1		249.5
TOTAL EXPENSES		853.6		778.2		1,770.0		1,699.4
OPERATING INCOME (LOSS)		42.7		100.9		150.1		214.3
Other Income (Expense):
Other Income		0.1		0.2		0.1		0.3
Allowance for Equity Funds Used During Construction		4.3		2.9		9.8		5.7
Non-Service Cost Components of Net Periodic Benefit Cost		5.3		6.5		10.8		13.0
Interest Expense		(36.6)		(31.9)		(71.2)		(63.0)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		15.8		78.6		99.6		170.3
Income Tax Expense (Benefit)		(2.6)		10.9		10.6		24.6
Net Income (Loss)		18.4		67.7		89.0		145.7
Ohio Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		5.7		8.2		11.4		15.8
Ohio Power Co [Member] | Transmission and Distribution Utilities [Member]
Revenues
Revenue from Contracts with Customers		887.8		868.8		1,903.2		1,890.6
Ohio Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		2.8		2.1		5.5		7.3
TOTAL REVENUES		4.0	[9]	6.0	[10]	11.9	[11]	17.1	[12]
Ohio Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		185.0		267.6		443.7		660.2
Public Service Co Of Oklahoma [Member]
Revenues
TOTAL REVENUES		458.8		474.7		846.6		891.7
Expenses
Other Operation		119.3		87.5		215.9		179.6
Maintenance		24.9		28.5		53.0		57.3
Depreciation and Amortization		64.1		64.9		131.5		126.0
Taxes Other Than Income Taxes		24.4		15.0		41.4		32.3
TOTAL EXPENSES		412.7		419.0		770.7		818.4
OPERATING INCOME (LOSS)		46.1		55.7		75.9		73.3
Other Income (Expense):
Interest Income		0.3		0.1		0.5		1.1
Allowance for Equity Funds Used During Construction		0.9		1.4		3.3		2.9
Non-Service Cost Components of Net Periodic Benefit Cost		2.7		3.5		5.6		7.1
Interest Expense		(26.9)		(26.8)		(43.7)		(52.0)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		23.1		33.9		41.6		32.4
Income Tax Expense (Benefit)		(13.2)		(17.1)		(66.7)		(16.3)
Net Income (Loss)		36.3		51.0		108.3		48.7
Earnings Per Share
Cash Flow Hedges, Tax		0.0		0.0		0.0		(0.4)
Public Service Co Of Oklahoma [Member] | Related Party
Revenues
Revenue from Contracts with Customers		1.1		0.1		4.6		0.8
Public Service Co Of Oklahoma [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		448.1		472.4		826.2		887.2
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		9.6		2.2		15.8		3.7
TOTAL REVENUES		0.0	[9]	0.0	[10]	0.0	[11]	0.0	[12]
Public Service Co Of Oklahoma [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		180.0		223.1		328.9		423.2
Southwestern Electric Power Co [Member]
Revenues
Provision for Refund		(169.2)		(8.5)		(180.1)		(4.1)
TOTAL REVENUES		395.8		537.8		912.0		1,053.7
Expenses
Other Operation		116.3		85.2		229.2		184.4
Maintenance		53.4		45.0		90.6		82.7
Depreciation and Amortization		101.2		85.8		179.9		166.2
Taxes Other Than Income Taxes		25.5		32.1		59.7		68.2
TOTAL EXPENSES		489.8		438.0		937.4		900.7
OPERATING INCOME (LOSS)		(94.0)		99.8		(25.4)		153.0
Other Income (Expense):
Interest Income		4.3		5.3		8.3		10.7
Allowance for Equity Funds Used During Construction		3.4		2.5		6.8		3.0
Non-Service Cost Components of Net Periodic Benefit Cost		2.4		3.4		5.0		6.8
Interest Expense		(29.7)		(40.1)		(43.2)		(65.1)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS		(113.6)		70.9		(48.5)		108.4
Income Tax Expense (Benefit)		(44.2)		(10.0)		(188.3)		(14.0)
Equity Earnings (Loss) of Unconsolidated Subsidiaries		0.3		0.4		0.7		0.7
Net Income (Loss)		(69.1)		81.3		140.5		123.1
Net Income (Loss) Attributable to Noncontrolling Interests		1.0		0.3		2.5		1.5
Earnings Attributable to Common Shareholders		(70.1)		81.0		138.0		121.6
Earnings Per Share
Cash Flow Hedges, Tax		0.0		0.0		0.0		0.1
Amortization of Pension and OPEB Deferred Costs, Tax		0.0		(0.1)		0.0		(0.2)
Southwestern Electric Power Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		16.5		19.7		30.4		31.3
Southwestern Electric Power Co [Member] | Vertically Integrated Utilities [Member]
Revenues
Revenue from Contracts with Customers		546.1		525.8		1,055.4		1,025.2
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		2.4		0.8		6.3		1.3
TOTAL REVENUES		0.0	[9]	0.0	[10]	0.0	[11]	0.0	[12]
Southwestern Electric Power Co [Member] | Purchased Electricity, Fuel and Other Consumables Used for Electric Generation [Member]
Expenses
Cost of Goods and Services Sold		193.4		189.9		378.0		399.2
Reconciling Adjustments [Member]
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
TOTAL REVENUES		(490.8)		(464.2)		(1,016.8)		(907.9)
Other Income (Expense):
Net Income (Loss)		0.0		0.0		0.0		0.0
Reconciling Adjustments [Member] | Related Party
Revenues
Revenue from Contracts with Customers	[14]	(490.8)		(464.2)		(1,016.8)		(907.9)
Reconciling Adjustments [Member] | Other Revenues [Member]
Revenues
TOTAL REVENUES		(2.4)	[1],[2]	(2.0)	[3],[4]	5.6	[5],[6]	(2.9)	[7],[8]
Reconciling Adjustments [Member] | AEP Transmission Co [Member]
Revenues
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
TOTAL REVENUES		0.0		0.0		0.0		0.0
Other Income (Expense):
Net Income (Loss)		0.0		0.0		0.0		0.0
Reconciling Adjustments [Member] | AEP Transmission Co [Member] | Related Party
Revenues
Revenue from Contracts with Customers		0.0		$ 0.0		0.0		$ 0.0
Reconciling Adjustments [Member] | AEP Transmission Co [Member] | Other Revenues [Member]
Revenues
Revenue from Contracts with Customers		$ 0.0				$ 0.0

[1] Amounts include affiliated and nonaffiliated revenues.

[2] Generation & Marketing includes economic hedge activity.

[3] Generation & Marketing includes economic hedge activity.

[4] Amounts include affiliated and nonaffiliated revenues

[5] Amounts include affiliated and nonaffiliated revenues.

[6] Generation & Marketing includes economic hedge activity.

[7] Generation & Marketing includes economic hedge activity.

[8] Amounts include affiliated and nonaffiliated revenues

[9] Amounts include affiliated and nonaffiliated revenues.

[10] Amounts include affiliated and nonaffiliated revenues.

[11] Amounts include affiliated and nonaffiliated revenues.

[12] Amounts include affiliated and nonaffiliated revenues.

[13] Includes the elimination of AEPTCo Parent’s equity earnings in the State Transcos.

[14] Represents inter-segment revenues.