Revenue from Contracts with Customers (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2024		Sep. 30, 2023		Sep. 30, 2024		Sep. 30, 2023		Dec. 31, 2023
Disaggregation of Revenue
Revenue from Contracts with Customers		$ 5,420.1		$ 5,341.7		$ 15,025.0		$ 14,405.1
Revenues		5,420.1		5,341.7		15,025.0		14,405.1
Revenue, Performance Obligation
Fixed Performance Obligations		302.4				302.4
Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		4,202.9		4,158.3		11,498.6		11,405.9
Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2,136.6		2,099.2		5,651.9		5,462.5
Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,172.6		1,141.0		3,255.6		3,151.3
Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		816.0	[1]	838.5		2,374.7	[2]	2,572.4	[3]
Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		77.7		79.6		216.4		219.7
Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,141.3		1,035.6		3,376.5		2,953.2
Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		228.0		205.8		664.0		582.1
Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		390.8	[4]	337.6	[5]	1,190.5	[6]	1,015.4	[7]
Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		7.2	[1]	17.3	[8]	18.9	[2]	68.5	[3]
Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		515.3	[9]	474.9	[10]	1,503.1	[11]	1,287.2	[12]
Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		125.9	[13]	132.3	[14]	337.6	[15]	314.8	[16]
Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		5,470.1		5,326.2		15,212.7		14,673.9
Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(50.0)		15.5		(187.7)		(268.8)
Alternative [Member]
Disaggregation of Revenue
Revenues		12.8	[1],[17]	7.0	[8],[18]	(21.3)	[2],[19]	(18.6)	[3],[20]
Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		119.1		120.9		380.4		307.8
Revenues		(62.8)	[1],[21]	8.5	[8],[22]	(166.4)	[2],[23]	(250.2)	[3],[24]
2024 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		23.1				23.1
2025-2026[Member]
Revenue, Performance Obligation
Fixed Performance Obligations		169.0				169.0
2027-2028 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		85.4				85.4
After 2028
Revenue, Performance Obligation
Fixed Performance Obligations		24.9				24.9
AEP Texas Inc. [Member]
Disaggregation of Revenue
Revenues		571.2		554.6		1,577.2		1,445.3
AEP Texas Inc. [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		1.3		1.2		4.0		3.7
Revenue Textuals
Affiliated Companies - Contracts with Customers		20.4				20.4				$ 23.8
AEP Texas Inc. [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		393.9		393.2		1,040.6		958.2
AEP Texas Inc. [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		230.2		236.2		562.4		511.8
AEP Texas Inc. [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		120.3		112.4		346.2		310.3
AEP Texas Inc. [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		33.7	[25]	35.4		103.3	[26]	109.9	[27]
AEP Texas Inc. [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		9.7		9.2		28.7		26.2
AEP Texas Inc. [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		170.6		154.6		511.3		464.0
AEP Texas Inc. [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[28]	0.0	[29]	0.0	[30]	0.0	[31]
AEP Texas Inc. [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		170.6	[32]	154.6	[33]	511.3	[34]	464.0	[35]
AEP Texas Inc. [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		8.2	[36]	8.8	[37]	27.4	[38]	29.2	[39]
AEP Texas Inc. [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		572.7		556.6		1,579.3		1,451.4
AEP Texas Inc. [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(1.5)		(2.0)		(2.1)		(6.1)
AEP Texas Inc. [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(1.5)	[25],[40]	(2.0)	[41],[42]	(2.1)	[26],[43]	(6.1)	[27],[44]
AEP Texas Inc. [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.7		1.8		3.3		2.9
Revenues		0.0	[25]	0.0	[42]	0.0	[26]	0.0	[27]
AEP Texas Inc. [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		0.0				0.0				0.0
AEP Transmission Co [Member]
Disaggregation of Revenue
Revenues		497.2		462.7		1,455.2		1,349.2
AEP Transmission Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		404.4		374.7		1,188.2		1,097.9
Revenue Textuals
Affiliated Companies - Contracts with Customers		141.1				141.1				125.5
AEP Transmission Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[25]	0.0		0.0	[26]	0.0	[27]
AEP Transmission Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		491.9		454.7		1,450.5		1,338.1
AEP Transmission Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[28]	0.0	[29]	0.0	[30]	0.0	[31]
AEP Transmission Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		491.9	[32]	454.7	[33]	1,450.5	[34]	1,338.1	[35]
AEP Transmission Co [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		399.0		363.0		1,200.0		1,100.0
AEP Transmission Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		6.0	[36]	5.0	[37]	20.3	[38]	12.8	[39]
AEP Transmission Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		497.9		459.7		1,470.8		1,350.9
AEP Transmission Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(0.7)		3.0		(15.6)		(1.7)
AEP Transmission Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(0.7)	[25],[40]	3.0	[41],[42]	(15.6)	[26],[43]	(1.7)	[27],[44]
AEP Transmission Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.2		0.0		3.0		0.0
Revenues		0.0	[25]	0.0	[42]	0.0	[26]	0.0	[27]
AEP Transmission Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		131.1				131.1				123.2
Appalachian Power Co [Member]
Disaggregation of Revenue
Revenues		1,028.9		961.8		3,032.1		2,776.0
Revenue, Performance Obligation
Fixed Performance Obligations		74.2				74.2
Appalachian Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		65.2		62.5		183.1		193.2
Revenue Textuals
Affiliated Companies - Contracts with Customers		102.7				102.7				98.8
Appalachian Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		868.3		802.3		2,593.3		2,362.2
Appalachian Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		442.6		397.1		1,333.7		1,192.4
Appalachian Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		196.4		181.3		571.8		516.2
Appalachian Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		201.2	[25]	197.1		603.5	[26]	575.4	[27]
Appalachian Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		28.1		26.8		84.3		78.2
Appalachian Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		124.3		124.9		374.2		354.6
Appalachian Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		78.7	[28]	79.4	[29]	235.9	[30]	223.8	[31]
Appalachian Power Co [Member] | Wholesale Generation [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		41.0		36.0		118.0		121.0
Appalachian Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		45.6	[32]	45.5	[33]	138.3	[34]	130.8	[35]
Appalachian Power Co [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		22.0		22.0		65.0		64.0
Appalachian Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		36.2	[36]	35.2	[37]	71.0	[38]	60.0	[39]
Appalachian Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,028.8		962.4		3,038.5		2,776.8
Appalachian Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		0.1		(0.6)		(6.4)		(0.8)
Appalachian Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.0	[25],[40]	(0.7)	[41],[42]	(6.6)	[26],[43]	(0.9)	[27],[44]
Appalachian Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		3.1		3.3		12.4		9.8
Revenues		0.1	[25]	0.1	[42]	0.2	[26]	0.1	[27]
Appalachian Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		74.0				74.0				71.7
Appalachian Power Co [Member] | 2024 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		4.0				4.0
Appalachian Power Co [Member] | 2025-2026[Member]
Revenue, Performance Obligation
Fixed Performance Obligations		32.1				32.1
Appalachian Power Co [Member] | 2027-2028 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		26.5				26.5
Appalachian Power Co [Member] | After 2028
Revenue, Performance Obligation
Fixed Performance Obligations		11.6				11.6
Indiana Michigan Power Co [Member]
Disaggregation of Revenue
Revenues		733.5		676.3		1,995.2		1,938.5
Revenue, Performance Obligation
Fixed Performance Obligations		23.2				23.2
Indiana Michigan Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		1.3		0.6		5.2		3.7
Revenue Textuals
Affiliated Companies - Contracts with Customers		72.6				72.6				65.0
Indiana Michigan Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		575.9		550.3		1,590.4		1,566.4
Indiana Michigan Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		249.4		230.7		664.7		655.5
Indiana Michigan Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		169.9		159.2		465.5		439.5
Indiana Michigan Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		155.4	[25]	159.1		456.4	[26]	467.6	[27]
Indiana Michigan Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1.2		1.3		3.8		3.8
Indiana Michigan Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		123.9		100.6		336.1		285.8
Indiana Michigan Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		113.5	[28]	90.2	[29]	305.6	[30]	257.7	[31]
Indiana Michigan Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		10.4	[32]	10.4	[33]	30.5	[34]	28.1	[35]
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		35.3	[36]	26.2	[37]	92.3	[38]	92.6	[39]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		18.0		18.0		59.0		52.0
Indiana Michigan Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		735.1		677.1		2,018.8		1,944.8
Indiana Michigan Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(1.6)		(0.8)		(23.6)		(6.3)
Indiana Michigan Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(0.4)	[25],[40]	(2.9)	[41],[42]	(0.9)	[26],[43]	(8.4)	[27],[44]
Indiana Michigan Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2.1		4.2		7.0		9.7
Revenues		(1.2)	[25]	2.1	[42]	(22.7)	[26]	2.1	[27]
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		15.2		15.4		50.7		45.8
Indiana Michigan Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		46.8				46.8				44.0
Indiana Michigan Power Co [Member] | 2024 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		1.1				1.1
Indiana Michigan Power Co [Member] | 2025-2026[Member]
Revenue, Performance Obligation
Fixed Performance Obligations		8.8				8.8
Indiana Michigan Power Co [Member] | 2027-2028 [Member]
Revenue, Performance Obligation
Fixed Performance Obligations		8.8				8.8
Indiana Michigan Power Co [Member] | After 2028
Revenue, Performance Obligation
Fixed Performance Obligations		4.5				4.5
Ohio Power Co [Member]
Disaggregation of Revenue
Revenues		1,004.2		989.5		2,924.3		2,903.2
Ohio Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		5.6		7.8		17.0		23.6
Revenue Textuals
Affiliated Companies - Contracts with Customers		122.6				122.6				129.2
Ohio Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		913.7		919.0		2,695.9		2,708.4
Ohio Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		543.4		536.3		1,565.2		1,491.6
Ohio Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		276.2		275.3		838.4		811.6
Ohio Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		89.9	[25]	103.6		279.4	[26]	394.0	[27]
Ohio Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		4.2		3.8		12.9		11.2
Ohio Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		24.5		21.4		71.9		60.3
Ohio Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[28]	0.0	[29]	0.0	[30]	0.0	[31]
Ohio Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		24.5	[32]	21.4	[33]	71.9	[34]	60.3	[35]
Ohio Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		50.8	[36]	49.2	[37]	121.5	[38]	127.9	[39]
Ohio Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		989.0		989.6		2,889.3		2,896.6
Ohio Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		15.2		(0.1)		35.0		6.6
Ohio Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		11.9	[25],[40]	(3.1)	[41],[42]	19.8	[26],[43]	(13.5)	[27],[44]
Ohio Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2.8		3.0		8.3		10.3
Revenues		3.3	[25]	3.0	[42]	15.2	[26]	20.1	[27]
Ohio Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		66.9				66.9				70.1
Public Service Co Of Oklahoma [Member]
Disaggregation of Revenue
Revenues		615.4		644.2		1,462.0		1,535.9
Public Service Co Of Oklahoma [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		1.1		0.2		5.7		1.0
Revenue Textuals
Affiliated Companies - Contracts with Customers		46.2				46.2				31.0
Public Service Co Of Oklahoma [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		595.5		630.3		1,393.4		1,487.1
Public Service Co Of Oklahoma [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		301.1		310.5		647.1		667.9
Public Service Co Of Oklahoma [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		165.1		171.9		398.2		412.7
Public Service Co Of Oklahoma [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		98.5	[25]	114.1		269.9	[26]	320.2	[27]
Public Service Co Of Oklahoma [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		30.8		33.8		78.2		86.3
Public Service Co Of Oklahoma [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		14.1		5.9		40.0		32.3
Public Service Co Of Oklahoma [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2.1	[28]	(4.9)	[29]	7.0	[30]	0.3	[31]
Public Service Co Of Oklahoma [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		12.0	[32]	10.8	[33]	33.0	[34]	32.0	[35]
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		6.0	[36]	5.4	[37]	30.4	[38]	14.9	[39]
Public Service Co Of Oklahoma [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		615.6		641.6		1,463.8		1,534.3
Public Service Co Of Oklahoma [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(0.2)		2.6		(1.8)		1.6
Public Service Co Of Oklahoma [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(0.2)	[25],[40]	2.6	[41],[42]	(1.8)	[26],[43]	1.6	[27],[44]
Public Service Co Of Oklahoma [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1.4		1.4		17.2		5.1
Revenues		0.0	[25]	0.0	[42]	0.0	[26]	0.0	[27]
Public Service Co Of Oklahoma [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		12.5				12.5				12.4
Southwestern Electric Power Co [Member]
Disaggregation of Revenue
Revenues		638.8		654.8		1,550.8		1,708.5
Southwestern Electric Power Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		21.9		14.4		52.3		45.7
Revenue Textuals
Affiliated Companies - Contracts with Customers		55.5				55.5				47.2
Southwestern Electric Power Co [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		537.4		569.3		1,252.8		1,447.6
Southwestern Electric Power Co [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		260.1		286.5		563.2		647.5
Southwestern Electric Power Co [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		172.5		174.9		413.2		472.2
Southwestern Electric Power Co [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		102.5	[25]	105.5		269.8	[26]	320.3	[27]
Southwestern Electric Power Co [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2.3		2.4		6.6		7.6
Southwestern Electric Power Co [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		92.7		79.2		276.2		243.9
Southwestern Electric Power Co [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		42.7	[28]	36.8	[29]	139.9	[30]	120.3	[31]
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		50.0	[32]	42.4	[33]	136.3	[34]	123.6	[35]
Southwestern Electric Power Co [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		22.0		17.0		50.0		43.0
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		8.8	[36]	6.0	[37]	26.0	[38]	20.9	[39]
Southwestern Electric Power Co [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		638.9		654.5		1,555.0		1,712.4
Southwestern Electric Power Co [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(0.1)		0.3		(4.2)		(3.9)
Southwestern Electric Power Co [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		(0.1)	[25],[40]	0.3	[41],[42]	(4.2)	[26],[43]	(3.9)	[27],[44]
Southwestern Electric Power Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.7		0.5		7.0		1.8
Revenues		0.0	[25]	0.0	[42]	0.0	[26]	0.0	[27]
Southwestern Electric Power Co [Member] | Short-term Contract with Customer [Member] | Related Party
Revenue Textuals
Affiliated Companies - Contracts with Customers		25.7				25.7				$ 27.4
Consolidation Eliminations [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Revenues		(508.0)		(508.4)		(1,524.8)		(1,416.3)
Consolidation Eliminations [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers	[45]	(508.0)		(508.4)		(1,524.8)		(1,416.3)
Consolidation Eliminations [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(0.3)		(0.3)		(0.6)		(0.6)
Consolidation Eliminations [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(0.3)	[1]	(0.3)		(0.6)	[2]	(0.6)	[3]
Consolidation Eliminations [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(454.6)		(464.6)		(1,342.9)		(1,282.3)
Consolidation Eliminations [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.1		(0.3)		0.1		(0.2)
Consolidation Eliminations [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(439.4)	[4]	(425.1)	[5]	(1,255.0)	[6]	(1,229.7)	[7]
Consolidation Eliminations [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(1.5)	[1]	(2.5)	[8]	(4.3)	[2]	(5.7)	[3]
Consolidation Eliminations [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(13.8)	[9]	(36.7)	[10]	(83.7)	[11]	(46.7)	[12]
Consolidation Eliminations [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(53.4)	[13]	(48.5)	[14]	(170.9)	[15]	(132.1)	[16]
Consolidation Eliminations [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(508.3)		(513.4)		(1,514.4)		(1,415.0)
Consolidation Eliminations [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		0.3		5.0		(10.4)		(1.3)
Consolidation Eliminations [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		1.0	[1],[17]	5.7	[8],[18]	(15.3)	[2],[19]	2.3	[3],[20]
Consolidation Eliminations [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		(0.7)	[1],[21]	(0.7)	[8],[22]	4.9	[2],[23]	(3.6)	[3],[24]
Consolidation Eliminations [Member] | AEP Transmission Co [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Revenues		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | AEP Transmission Co [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Consolidation Eliminations [Member] | AEP Transmission Co [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0				0.0
Vertically Integrated Utilities [Member]
Disaggregation of Revenue
Revenues		3,303.0		3,205.4		8,869.9		8,737.7
Vertically Integrated Utilities [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		54.2		47.3		147.9		134.3
Vertically Integrated Utilities [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		2,895.4		2,846.5		7,762.6		7,739.9
Vertically Integrated Utilities [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,362.9		1,326.7		3,524.2		3,459.1
Vertically Integrated Utilities [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		776.1		753.3		2,071.0		2,029.4
Vertically Integrated Utilities [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		692.6	[1]	699.9		1,992.5	[2]	2,069.1	[3]
Vertically Integrated Utilities [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		63.8		66.6		174.9		182.3
Vertically Integrated Utilities [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		332.1		294.9		958.9		847.3
Vertically Integrated Utilities [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		202.5		174.3		587.4		498.5
Vertically Integrated Utilities [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		129.6	[4]	120.6	[5]	371.5	[6]	348.8	[7]
Vertically Integrated Utilities [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		51.0				133.0		125.0
Vertically Integrated Utilities [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[1]	0.0	[8]	0.0	[2]	0.0	[3]
Vertically Integrated Utilities [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[9]	0.0	[10]	0.0	[11]	0.0	[12]
Vertically Integrated Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		76.2	[13]	61.3	[14]	183.3	[15]	155.8	[16]
Vertically Integrated Utilities [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		3,303.7		3,202.7		8,904.8		8,743.0
Vertically Integrated Utilities [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(0.7)		2.7		(34.9)		(5.3)
Vertically Integrated Utilities [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.3	[1],[17]	0.5	[8],[18]	(12.5)	[2],[19]	(7.5)	[3],[20]
Vertically Integrated Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		(1.0)	[1],[21]	2.2	[8],[22]	(22.4)	[2],[23]	2.2	[3],[24]
Transmission And Distribution Utilities [Member]
Disaggregation of Revenue
Revenues		1,575.4		1,544.1		4,501.5		4,348.5
Transmission And Distribution Utilities [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		6.9		8.9		21.0		27.2
Transmission And Distribution Utilities [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,307.8		1,312.1		3,736.6		3,666.6
Transmission And Distribution Utilities [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		773.7		772.5		2,127.7		2,003.4
Transmission And Distribution Utilities [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		396.5		387.7		1,184.6		1,121.9
Transmission And Distribution Utilities [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		123.7	[1]	138.9		382.8	[2]	503.9	[3]
Transmission And Distribution Utilities [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		13.9		13.0		41.5		37.4
Transmission And Distribution Utilities [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		195.1		176.0		583.2		524.3
Transmission And Distribution Utilities [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Transmission And Distribution Utilities [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		195.1	[4]	176.0	[5]	583.2	[6]	524.3	[7]
Transmission And Distribution Utilities [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[1]	0.0	[8]	0.0	[2]	0.0	[3]
Transmission And Distribution Utilities [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[9]	0.0	[10]	0.0	[11]	0.0	[12]
Transmission And Distribution Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		58.9	[13]	58.2	[14]	148.8	[15]	157.1	[16]
Transmission And Distribution Utilities [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		1,561.8		1,546.3		4,468.6		4,348.0
Transmission And Distribution Utilities [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		13.6		(2.2)		32.9		0.5
Transmission And Distribution Utilities [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		10.3	[1],[17]	(5.0)	[8],[18]	17.7	[2],[19]	(19.5)	[3],[20]
Transmission And Distribution Utilities [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		3.3	[1],[21]	2.8	[8],[22]	15.2	[2],[23]	20.0	[3],[24]
AEP Transmission Holdco [Member]
Disaggregation of Revenue
Revenues		512.5		476.7		1,499.7		1,390.8
AEP Transmission Holdco [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[1]	0.0		0.0	[2]	0.0	[3]
AEP Transmission Holdco [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		505.5		466.1		1,490.8		1,372.0
AEP Transmission Holdco [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
AEP Transmission Holdco [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		505.5	[4]	466.1	[5]	1,490.8	[6]	1,372.0	[7]
AEP Transmission Holdco [Member] | Wholesale Transmission [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		402.0		366.0		1,200.0		1,100.0
AEP Transmission Holdco [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[1]	0.0	[8]	0.0	[2]	0.0	[3]
AEP Transmission Holdco [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[9]	0.0	[10]	0.0	[11]	0.0	[12]
AEP Transmission Holdco [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		5.8	[13]	4.8	[14]	20.1	[15]	12.7	[16]
AEP Transmission Holdco [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		511.3		470.9		1,510.9		1,384.7
AEP Transmission Holdco [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		1.2		5.8		(11.2)		6.1
AEP Transmission Holdco [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		1.2	[1],[17]	5.8	[8],[18]	(11.2)	[2],[19]	6.1	[3],[20]
AEP Transmission Holdco [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		0.0	[1],[21]	0.0	[8],[22]	0.0	[2],[23]	0.0	[3],[24]
Generation And Marketing [Member]
Disaggregation of Revenue
Revenues		499.1		566.7		1,530.1		1,225.1
Generation And Marketing [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		15.4		39.2		88.0		52.5
Generation And Marketing [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[1]	0.0		0.0	[2]	0.0	[3]
Generation And Marketing [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Generation And Marketing [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		563.4		562.4		1,685.9		1,490.2
Generation And Marketing [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		25.4		31.8		76.5		83.8
Generation And Marketing [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[4]	0.0	[5]	0.0	[6]	0.0	[7]
Generation And Marketing [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		8.7	[1]	19.8	[8]	23.2	[2]	74.2	[3]
Generation And Marketing [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		529.3	[9]	510.8	[10]	1,586.2	[11]	1,332.2	[12]
Generation And Marketing [Member] | Retail, Trading and Marketing Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		14.0		37.0		84.0		47.0
Generation And Marketing [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.8	[13]	0.9	[14]	3.1	[15]	7.7	[16]
Generation And Marketing [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		564.2		563.3		1,689.0		1,497.9
Generation And Marketing [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		(65.1)		3.4		(158.9)		(272.8)
Generation And Marketing [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.0	[1],[17]	0.0	[8],[18]	0.0	[2],[19]	0.0	[3],[20]
Generation And Marketing [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenues		(65.1)	[1],[21]	3.4	[8],[22]	(158.9)	[2],[23]	(272.8)	[3],[24]
Other Operating Segment [Member]
Disaggregation of Revenue
Revenues	[46]	38.1		57.2		148.6		119.3
Other Operating Segment [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers	[46]	32.1		30.3		100.5		83.9
Other Operating Segment [Member] | Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Operating Segment [Member] | Residential [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Operating Segment [Member] | Commercial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Operating Segment [Member] | Industrial [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[1]	0.0		0.0	[2]	0.0	[3]
Other Operating Segment [Member] | Other Retail [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Operating Segment [Member] | Wholesale and Competitive [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(0.2)		0.8		0.6		1.7
Other Operating Segment [Member] | Wholesale Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0		0.0		0.0		0.0
Other Operating Segment [Member] | Wholesale Transmission [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[4]	0.0	[5]	0.0	[6]	0.0	[7]
Other Operating Segment [Member] | Renewable Generation [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		0.0	[1]	0.0	[8]	0.0	[2]	0.0	[3]
Other Operating Segment [Member] | Retail, Trading and Marketing Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		(0.2)	[9]	0.8	[10]	0.6	[11]	1.7	[12]
Other Operating Segment [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		37.6	[13]	55.6	[14]	153.2	[15]	113.6	[16]
Other Operating Segment [Member] | Affiliated and Nonaffiliated [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers		37.4		56.4		153.8		115.3
Other Operating Segment [Member] | Alternative and Other [Member]
Disaggregation of Revenue
Revenues		0.7		0.8		(5.2)		4.0
Other Operating Segment [Member] | Alternative [Member]
Disaggregation of Revenue
Revenues		0.0	[1],[17]	0.0	[8],[18]	0.0	[2],[19]	0.0	[3],[20]
Other Operating Segment [Member] | Other Revenues [Member]
Disaggregation of Revenue
Revenue from Contracts with Customers	[46]	6.0		26.9		48.1		35.4
Revenues		0.7	[1],[21]	0.8	[8],[22]	(5.2)	[2],[23]	4.0	[3],[24]
Corporate Segment and Other Operating Segment | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers		$ 34.0		$ 32.0
Corporate Segment and Other Operating Segment | Other Revenues [Member] | Related Party
Disaggregation of Revenue
Revenue from Contracts with Customers						$ 112.0		$ 87.0

[1] Amounts include affiliated and nonaffiliated revenues.

[2] Amounts include affiliated and nonaffiliated revenues.

[3] Amounts include affiliated and nonaffiliated revenues

[4] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $402 million. The affiliated revenue for Vertically Integrated Utilities was $51 million. The remaining affiliated amounts were immaterial.

[5] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $366 million. The remaining affiliated amounts were immaterial.

[6] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.2 billion. The affiliated revenue for Vertically Integrated Utilities was $133 million. The remaining affiliated amounts were immaterial.

[7] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEP Transmission Holdco was $1.1 billion. The affiliated revenue for Vertically Integrated Utilities was $125 million. The remaining affiliated amounts were immaterial.

[8] Amounts include affiliated and nonaffiliated revenues

[9] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $14 million. The remaining affiliated amounts were immaterial.

[10] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $37 million. The remaining affiliated amounts were immaterial.

[11] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $84 million. The remaining affiliated amounts were immaterial.

[12] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Generation & Marketing was $47 million. The remaining affiliated amounts were immaterial.

[13] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $34 million. The remaining affiliated amounts were immaterial.

[14] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $32 million. The remaining affiliated amounts were immaterial.

[15] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $112 million. The remaining affiliated amounts were immaterial.

[16] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for Corporate and Other was $87 million. The remaining affiliated amounts were immaterial.

[17] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[18] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[19] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[20] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[21] Generation & Marketing includes economic hedge activity.

[22] Generation & Marketing includes economic hedge activity.

[23] Generation & Marketing includes economic hedge activity.

[24] Generation & Marketing includes economic hedge activity.

[25] Amounts include affiliated and nonaffiliated revenues.

[26] Amounts include affiliated and nonaffiliated revenues.

[27] Amounts include affiliated and nonaffiliated revenues.

[28] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $41 million primarily related to the PPA with KGPCo.

[29] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $36 million primarily related to the PPA with KGPCo.

[30] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $118 million primarily related to the PPA with KGPCo. The remaining affiliated amounts were immaterial.

[31] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for APCo was $121 million primarily related to the PPA with KGPCo. The remaining affiliated amounts were immaterial.

[32] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $399 million, APCo was $22 million and SWEPCo was $22 million. The remaining affiliated amounts were immaterial.

[33] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $363 million, APCo was $22 million and SWEPCo was $17 million. The remaining affiliated amounts were immaterial.

[34] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.2 billion, APCo was $65 million and SWEPCo was $50 million. The remaining affiliated amounts were immaterial.

[35] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for AEPTCo was $1.1 billion, APCo was $64 million and SWEPCo was $43 million. The remaining affiliated amounts were immaterial.

[36] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $18 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[37] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $18 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[38] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $59 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[39] Amounts include affiliated and nonaffiliated revenues. The affiliated revenue for I&M was $52 million primarily related to barging, urea transloading and other transportation services. The remaining affiliated amounts were immaterial.

[40] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[41] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[42] Amounts include affiliated and nonaffiliated revenues.

[43] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[44] Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over/under collection of related revenues.

[45] Represents inter-segment revenues.

[46] Corporate and Other primarily includes the purchasing of receivables from certain AEP utility subsidiaries. This segment also includes Parent’s guarantee revenue received from affiliates, investment income, interest income and interest expense, income tax expense and other nonallocated costs.