Derivatives and Hedging (Details) (USD $)	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	$ 26,000,000				$ 26,000,000				$ 4,000,000
Cash Collateral Paid Netted Against Risk Management Liabilities	1,000,000				1,000,000				13,000,000
Fair Value of Derivative Instruments
Current Risk Management Assets	146,000,000				146,000,000				160,000,000
Long-term Risk Management Assets	224,000,000				224,000,000				297,000,000
Total Assets	370,000,000				370,000,000				457,000,000
Current Risk Management Liabilities	60,000,000				60,000,000				90,000,000
Long-term Risk Management Liabilities	115,000,000				115,000,000				177,000,000
Total Liabilities	175,000,000				175,000,000				267,000,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	49,000,000		17,000,000		188,000,000		35,000,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	15,000,000	[1]			15,000,000	[1]			7,000,000	[1]
Hedging Liabilities	6,000,000	[1]			6,000,000	[1]			8,000,000	[1]
AOCI Gain (Loss) Net of Tax	(15,000,000)				(15,000,000)				(23,000,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					1,000,000				(4,000,000)
Maximum Term for Exposure to Variability of Future Cash Flows					42 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	1,000,000				1,000,000				3,000,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	167,000,000				167,000,000				33,000,000
Amount Attributable to RTO and ISO Activities	54,000,000				54,000,000				28,000,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	201,000,000				201,000,000				293,000,000
Amount of Cash Collateral Posted	0				0				1,000,000
Additional Settlement Liability if Cross Default Provision is Triggered	141,000,000				141,000,000				235,000,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	26,000,000				26,000,000				4,000,000
Cash Collateral Paid Netted Against Risk Management Liabilities	1,000,000				1,000,000				13,000,000
Maximum Term for Exposure to Variability of Future Cash Flows					42 months
Gain (Loss) on Fair Value Hedging Instrument	2,000,000		(11,000,000)		4,000,000		(12,000,000)
Gain (Loss) on Fair Value Portion of Long Term Debt	(2,000,000)		11,000,000		(4,000,000)		12,000,000
Appalachian Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	1,356,000				1,356,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	137,000				137,000				2,993,000
Fair Value of Derivative Instruments
Current Risk Management Assets	24,819,000				24,819,000				21,171,000
Long-term Risk Management Assets	8,110,000				8,110,000				16,948,000
Total Assets									38,119,000
Current Risk Management Liabilities	4,226,000				4,226,000				8,892,000
Long-term Risk Management Liabilities	3,766,000				3,766,000				10,241,000
Total Liabilities									19,133,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	14,902,000		450,000		52,085,000		663,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	140,000				140,000				575,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	3,096,000				3,096,000				2,747,000
Amount Attributable to RTO and ISO Activities	3,023,000				3,023,000				2,539,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	10,809,000				10,809,000				19,648,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	7,909,000				7,909,000				18,568,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	1,356,000				1,356,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	137,000				137,000				2,993,000
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Indiana Michigan Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	894,000				894,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	333,000				333,000				2,030,000
Fair Value of Derivative Instruments
Current Risk Management Assets	17,889,000				17,889,000				15,388,000
Long-term Risk Management Assets	5,407,000				5,407,000				11,495,000
Total Assets									26,883,000
Current Risk Management Liabilities	3,477,000				3,477,000				7,029,000
Long-term Risk Management Liabilities	2,554,000				2,554,000				6,946,000
Total Liabilities									13,975,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	9,816,000		432,000		34,068,000		683,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	95,000				95,000				390,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	2,096,000				2,096,000				1,863,000
Amount Attributable to RTO and ISO Activities	2,051,000				2,051,000				1,722,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	7,328,000				7,328,000				13,326,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	5,362,000				5,362,000				12,594,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	894,000				894,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	333,000				333,000				2,030,000
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Ohio Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	145,000				145,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	0				0				0
Fair Value of Derivative Instruments
Current Risk Management Assets	9,299,000				9,299,000				3,082,000
Total Assets									3,082,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	6,460,000		687,000		41,559,000		1,196,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	0				0				349,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	0				0				0
Amount Attributable to RTO and ISO Activities	0				0				0
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	0				0				0
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	0				0				0
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	145,000				145,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	0				0				0
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Public Service Co Of Oklahoma [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	72,000				72,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	0				0				1,000
Fair Value of Derivative Instruments
Current Risk Management Assets	522,000				522,000				1,167,000
Total Assets									1,167,000
Current Risk Management Liabilities	102,000				102,000				85,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(318,000)		360,000		449,000		2,418,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	3,000				3,000				0
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	10,137,000				10,137,000				2,930,000
Amount Attributable to RTO and ISO Activities	5,989,000				5,989,000				410,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	14,000				14,000				3,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	14,000				14,000				3,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	72,000				72,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	0				0				1,000
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Southwestern Electric Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	83,000				83,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	0				0				3,000
Fair Value of Derivative Instruments
Current Risk Management Assets	506,000				506,000				1,179,000
Total Assets									1,179,000
Current Risk Management Liabilities	17,000				17,000				0
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(1,114,000)		(32,000)		242,000		363,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	3,000				3,000				0
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	7,729,000				7,729,000				713,000
Amount Attributable to RTO and ISO Activities	7,585,000				7,585,000				519,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	18,000				18,000				3,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	18,000				18,000				3,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	83,000				83,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	0				0				3,000
Maximum Term for Exposure to Variability of Future Cash Flows					0 months
Risk Management Contracts [Member]
Fair Value of Derivative Instruments
Total Assets	349,000,000	[2],[3]			349,000,000	[2],[3]			440,000,000	[2],[4]
Total Liabilities	160,000,000	[2],[3]			160,000,000	[2],[3]			245,000,000	[2],[4]
Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	32,929,000	[5],[6]			32,929,000	[5],[6]			37,756,000	[5],[6]
Total Liabilities	7,992,000	[5],[6]			7,992,000	[5],[6]			18,846,000	[5],[6]
Risk Management Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	23,296,000	[5],[6]			23,296,000	[5],[6]			26,667,000	[5],[6]
Total Liabilities	6,031,000	[5],[6]			6,031,000	[5],[6]			13,781,000	[5],[6]
Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	9,299,000	[5],[6]			9,299,000	[5],[6]			2,920,000	[5],[6]
Total Liabilities									0	[5],[6]
Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Total Assets	522,000	[5],[6]			522,000	[5],[6]			1,083,000	[5],[6]
Total Liabilities	102,000	[5],[6]			102,000	[5],[6]			85,000	[5],[6]
Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	506,000	[5],[6]			506,000	[5],[6]			1,082,000	[5],[6]
Total Liabilities	17,000	[5],[6]			17,000	[5],[6]			0	[5],[6]
Commodity [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	15,000,000	[1]			15,000,000	[1]			7,000,000	[1]
Hedging Liabilities	4,000,000	[1]			4,000,000	[1]			6,000,000	[1]
AOCI Gain (Loss) Net of Tax	6,000,000				6,000,000				0
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					4,000,000				0
Derivatives and Hedging (Textuals) [Abstract]
Cross Default Provisions Maximum Third Party Obligation Amount	50,000,000				50,000,000				50,000,000
Commodity [Member] | Appalachian Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			363,000	[1]
Hedging Liabilities	0	[1]			0	[1]			287,000	[1]
AOCI Gain (Loss) Net of Tax	0				0				94,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					0				94,000
Commodity [Member] | Indiana Michigan Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			216,000	[1]
Hedging Liabilities	0	[1]			0	[1]			194,000	[1]
AOCI Gain (Loss) Net of Tax	0				0				46,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					0				46,000
Commodity [Member] | Ohio Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			162,000	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	0				0				105,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					0				105,000
Commodity [Member] | Public Service Co Of Oklahoma [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			84,000	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	0				0				57,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					0				57,000
Commodity [Member] | Southwestern Electric Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			97,000	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	0				0				66,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					0				66,000
Commodity [Member] | Risk Management Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	454,000,000	[7]			454,000,000	[7]			347,000,000	[7]
Long-term Risk Management Assets	314,000,000	[7]			314,000,000	[7]			368,000,000	[7]
Total Assets	768,000,000	[7]			768,000,000	[7]			715,000,000	[7]
Current Risk Management Liabilities	372,000,000	[7]			372,000,000	[7]			292,000,000	[7]
Long-term Risk Management Liabilities	182,000,000	[7]			182,000,000	[7]			237,000,000	[7]
Total Liabilities	554,000,000	[7]			554,000,000	[7]			529,000,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	214,000,000	[7]			214,000,000	[7]			186,000,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	38,369,000	[7]			38,369,000	[7]			46,431,000	[7]
Long-term Risk Management Assets	10,305,000	[7]			10,305,000	[7]			20,948,000	[7]
Total Assets	48,674,000	[7]			48,674,000	[7]			67,379,000	[7]
Current Risk Management Liabilities	16,948,000	[7]			16,948,000	[7]			37,010,000	[7]
Long-term Risk Management Liabilities	5,570,000	[7]			5,570,000	[7]			14,452,000	[7]
Total Liabilities	22,518,000	[7]			22,518,000	[7]			51,462,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	26,156,000	[7]			26,156,000	[7]			15,917,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	27,932,000	[7]			27,932,000	[7]			33,229,000	[7]
Long-term Risk Management Assets	6,894,000	[7]			6,894,000	[7]			14,208,000	[7]
Total Assets	34,826,000	[7]			34,826,000	[7]			47,437,000	[7]
Current Risk Management Liabilities	13,222,000	[7]			13,222,000	[7]			26,779,000	[7]
Long-term Risk Management Liabilities	3,778,000	[7]			3,778,000	[7]			9,802,000	[7]
Total Liabilities	17,000,000	[7]			17,000,000	[7]			36,581,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	17,826,000	[7]			17,826,000	[7]			10,856,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	9,430,000	[7]			9,430,000	[7]			3,269,000	[7]
Long-term Risk Management Assets	14,000	[7]			14,000	[7]			0	[7]
Total Assets	9,444,000	[7]			9,444,000	[7]			3,269,000	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			349,000	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			349,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	9,444,000	[7]			9,444,000	[7]			2,920,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	509,000	[7]			509,000	[7]			1,078,000	[7]
Long-term Risk Management Assets	8,000	[7]			8,000	[7]			0	[7]
Total Assets	517,000	[7]			517,000	[7]			1,078,000	[7]
Current Risk Management Liabilities	25,000	[7]			25,000	[7]			81,000	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	25,000	[7]			25,000	[7]			81,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	492,000	[7]			492,000	[7]			997,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	596,000	[7]			596,000	[7]			1,233,000	[7]
Long-term Risk Management Assets	9,000	[7]			9,000	[7]			0	[7]
Total Assets	605,000	[7]			605,000	[7]			1,233,000	[7]
Current Risk Management Liabilities	33,000	[7]			33,000	[7]			154,000	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	33,000	[7]			33,000	[7]			154,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	572,000	[7]			572,000	[7]			1,079,000	[7]
Commodity [Member] | Hedging Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	28,000,000	[7]			28,000,000	[7]			12,000,000	[7]
Long-term Risk Management Assets	5,000,000	[7]			5,000,000	[7]			3,000,000	[7]
Total Assets	33,000,000	[7]			33,000,000	[7]			15,000,000	[7]
Current Risk Management Liabilities	20,000,000	[7]			20,000,000	[7]			11,000,000	[7]
Long-term Risk Management Liabilities	2,000,000	[7]			2,000,000	[7]			3,000,000	[7]
Total Liabilities	22,000,000	[7]			22,000,000	[7]			14,000,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	11,000,000	[7]			11,000,000	[7]			1,000,000	[7]
Commodity [Member] | Hedging Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			389,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			389,000	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			313,000	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			313,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			76,000	[7]
Commodity [Member] | Hedging Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			234,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			234,000	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			212,000	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			212,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			22,000	[7]
Commodity [Member] | Hedging Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			162,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			162,000	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			162,000	[7]
Commodity [Member] | Hedging Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			84,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			84,000	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			84,000	[7]
Commodity [Member] | Hedging Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			97,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			97,000	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			97,000	[7]
Interest Rate and Foreign Currency [Member]
Commodity:
Derivative, Notional Amount	819,000,000				819,000,000				820,000,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	2,000,000	[1]			2,000,000	[1]			2,000,000	[1]
AOCI Gain (Loss) Net of Tax	(21,000,000)				(21,000,000)				(23,000,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(3,000,000)				(4,000,000)
Interest Rate and Foreign Currency [Member] | Appalachian Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	3,596,000				3,596,000				3,090,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(431,000)				(806,000)
Interest Rate and Foreign Currency [Member] | Indiana Michigan Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	(15,155,000)				(15,155,000)				(15,976,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(1,283,000)				(1,568,000)
Interest Rate and Foreign Currency [Member] | Ohio Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	6,288,000				6,288,000				6,974,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					1,372,000				1,363,000
Interest Rate and Foreign Currency [Member] | Public Service Co Of Oklahoma [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	5,322,000				5,322,000				5,701,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					759,000				759,000
Interest Rate and Foreign Currency [Member] | Southwestern Electric Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	0	[1]			0	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	(12,169,000)				(12,169,000)				(13,304,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(2,267,000)				(2,267,000)
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	4,000,000	[7]			4,000,000	[7]			4,000,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	4,000,000	[7]			4,000,000	[7]			4,000,000	[7]
Current Risk Management Liabilities	1,000,000	[7]			1,000,000	[7]			1,000,000	[7]
Long-term Risk Management Liabilities	10,000,000	[7]			10,000,000	[7]			15,000,000	[7]
Total Liabilities	11,000,000	[7]			11,000,000	[7]			16,000,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	(7,000,000)	[7]			(7,000,000)	[7]			(12,000,000)	[7]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			0	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			0	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			0	[7]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			0	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			0	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			0	[7]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			0	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			0	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			0	[7]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			0	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			0	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			0	[7]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[7]			0	[7]			0	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	0	[7]			0	[7]			0	[7]
Current Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Long-term Risk Management Liabilities	0	[7]			0	[7]			0	[7]
Total Liabilities	0	[7]			0	[7]			0	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[7]			0	[7]			0	[7]
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	486,000,000				486,000,000				363,000,000
Long-term Risk Management Assets	319,000,000				319,000,000				371,000,000
Total Assets	805,000,000				805,000,000				734,000,000
Current Risk Management Liabilities	393,000,000				393,000,000				304,000,000
Long-term Risk Management Liabilities	194,000,000				194,000,000				255,000,000
Total Liabilities	587,000,000				587,000,000				559,000,000
Total MTM Derivative Contract Net Assets (Liabilities)	218,000,000				218,000,000				175,000,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	38,369,000				38,369,000				46,820,000
Long-term Risk Management Assets	10,305,000				10,305,000				20,948,000
Total Assets	48,674,000				48,674,000				67,768,000
Current Risk Management Liabilities	16,948,000				16,948,000				37,323,000
Long-term Risk Management Liabilities	5,570,000				5,570,000				14,452,000
Total Liabilities	22,518,000				22,518,000				51,775,000
Total MTM Derivative Contract Net Assets (Liabilities)	26,156,000				26,156,000				15,993,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	27,932,000				27,932,000				33,463,000
Long-term Risk Management Assets	6,894,000				6,894,000				14,208,000
Total Assets	34,826,000				34,826,000				47,671,000
Current Risk Management Liabilities	13,222,000				13,222,000				26,991,000
Long-term Risk Management Liabilities	3,778,000				3,778,000				9,802,000
Total Liabilities	17,000,000				17,000,000				36,793,000
Total MTM Derivative Contract Net Assets (Liabilities)	17,826,000				17,826,000				10,878,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	9,430,000				9,430,000				3,431,000
Long-term Risk Management Assets	14,000				14,000				0
Total Assets	9,444,000				9,444,000				3,431,000
Current Risk Management Liabilities	0				0				349,000
Long-term Risk Management Liabilities	0				0				0
Total Liabilities	0				0				349,000
Total MTM Derivative Contract Net Assets (Liabilities)	9,444,000				9,444,000				3,082,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	509,000				509,000				1,162,000
Long-term Risk Management Assets	8,000				8,000				0
Total Assets	517,000				517,000				1,162,000
Current Risk Management Liabilities	25,000				25,000				81,000
Long-term Risk Management Liabilities	0				0				0
Total Liabilities	25,000				25,000				81,000
Total MTM Derivative Contract Net Assets (Liabilities)	492,000				492,000				1,081,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	596,000				596,000				1,330,000
Long-term Risk Management Assets	9,000				9,000				0
Total Assets	605,000				605,000				1,330,000
Current Risk Management Liabilities	33,000				33,000				154,000
Long-term Risk Management Liabilities	0				0				0
Total Liabilities	33,000				33,000				154,000
Total MTM Derivative Contract Net Assets (Liabilities)	572,000				572,000				1,176,000
Gross Amounts Offset in the Statement of Financial Position [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(340,000,000)	[8]			(340,000,000)	[8]			(203,000,000)	[8]
Long-term Risk Management Assets	(95,000,000)	[8]			(95,000,000)	[8]			(74,000,000)	[8]
Total Assets	(435,000,000)	[8]			(435,000,000)	[8]			(277,000,000)	[8]
Current Risk Management Liabilities	(333,000,000)	[8]			(333,000,000)	[8]			(214,000,000)	[8]
Long-term Risk Management Liabilities	(79,000,000)	[8]			(79,000,000)	[8]			(78,000,000)	[8]
Total Liabilities	(412,000,000)	[8]			(412,000,000)	[8]			(292,000,000)	[8]
Total MTM Derivative Contract Net Assets (Liabilities)	(23,000,000)	[8]			(23,000,000)	[8]			15,000,000	[8]
Gross Amounts Offset in the Statement of Financial Position [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(13,550,000)	[9]			(13,550,000)	[9]			(25,649,000)	[9]
Long-term Risk Management Assets	(2,195,000)	[9]			(2,195,000)	[9]			(4,000,000)	[9]
Total Assets	(15,745,000)	[9]			(15,745,000)	[9]			(29,649,000)	[9]
Current Risk Management Liabilities	(12,722,000)	[9]			(12,722,000)	[9]			(28,431,000)	[9]
Long-term Risk Management Liabilities	(1,804,000)	[9]			(1,804,000)	[9]			(4,211,000)	[9]
Total Liabilities	(14,526,000)	[9]			(14,526,000)	[9]			(32,642,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(1,219,000)	[9]			(1,219,000)	[9]			2,993,000	[9]
Gross Amounts Offset in the Statement of Financial Position [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(10,043,000)	[9]			(10,043,000)	[9]			(18,075,000)	[9]
Long-term Risk Management Assets	(1,487,000)	[9]			(1,487,000)	[9]			(2,713,000)	[9]
Total Assets	(11,530,000)	[9]			(11,530,000)	[9]			(20,788,000)	[9]
Current Risk Management Liabilities	(9,745,000)	[9]			(9,745,000)	[9]			(19,962,000)	[9]
Long-term Risk Management Liabilities	(1,224,000)	[9]			(1,224,000)	[9]			(2,856,000)	[9]
Total Liabilities	(10,969,000)	[9]			(10,969,000)	[9]			(22,818,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(561,000)	[9]			(561,000)	[9]			2,030,000	[9]
Gross Amounts Offset in the Statement of Financial Position [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(131,000)	[9]			(131,000)	[9]			(349,000)	[9]
Long-term Risk Management Assets	(14,000)	[9]			(14,000)	[9]			0	[9]
Total Assets	(145,000)	[9]			(145,000)	[9]			(349,000)	[9]
Current Risk Management Liabilities	0	[9]			0	[9]			(349,000)	[9]
Long-term Risk Management Liabilities	0	[9]			0	[9]			0	[9]
Total Liabilities	0	[9]			0	[9]			(349,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(145,000)	[9]			(145,000)	[9]			0	[9]
Gross Amounts Offset in the Statement of Financial Position [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	13,000	[9]			13,000	[9]			5,000	[9]
Long-term Risk Management Assets	(8,000)	[9]			(8,000)	[9]			0	[9]
Total Assets	5,000	[9]			5,000	[9]			5,000	[9]
Current Risk Management Liabilities	77,000	[9]			77,000	[9]			4,000	[9]
Long-term Risk Management Liabilities	0	[9]			0	[9]			0	[9]
Total Liabilities	77,000	[9]			77,000	[9]			4,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(72,000)	[9]			(72,000)	[9]			1,000	[9]
Gross Amounts Offset in the Statement of Financial Position [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(90,000)	[9]			(90,000)	[9]			(151,000)	[9]
Long-term Risk Management Assets	(9,000)	[9]			(9,000)	[9]			0	[9]
Total Assets	(99,000)	[9]			(99,000)	[9]			(151,000)	[9]
Current Risk Management Liabilities	(16,000)	[9]			(16,000)	[9]			(154,000)	[9]
Long-term Risk Management Liabilities	0	[9]			0	[9]			0	[9]
Total Liabilities	(16,000)	[9]			(16,000)	[9]			(154,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(83,000)	[9]			(83,000)	[9]			3,000	[9]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	146,000,000	[10]			146,000,000	[10]			160,000,000	[10]
Long-term Risk Management Assets	224,000,000	[10]			224,000,000	[10]			297,000,000	[10]
Total Assets	370,000,000	[10]			370,000,000	[10]			457,000,000	[10]
Current Risk Management Liabilities	60,000,000	[10]			60,000,000	[10]			90,000,000	[10]
Long-term Risk Management Liabilities	115,000,000	[10]			115,000,000	[10]			177,000,000	[10]
Total Liabilities	175,000,000	[10]			175,000,000	[10]			267,000,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	195,000,000	[10]			195,000,000	[10]			190,000,000	[10]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	24,819,000	[10]			24,819,000	[10]			21,171,000	[10]
Long-term Risk Management Assets	8,110,000	[10]			8,110,000	[10]			16,948,000	[10]
Total Assets	32,929,000	[10]			32,929,000	[10]			38,119,000	[10]
Current Risk Management Liabilities	4,226,000	[10]			4,226,000	[10]			8,892,000	[10]
Long-term Risk Management Liabilities	3,766,000	[10]			3,766,000	[10]			10,241,000	[10]
Total Liabilities	7,992,000	[10]			7,992,000	[10]			19,133,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	24,937,000	[10]			24,937,000	[10]			18,986,000	[10]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	17,889,000	[10]			17,889,000	[10]			15,388,000	[10]
Long-term Risk Management Assets	5,407,000	[10]			5,407,000	[10]			11,495,000	[10]
Total Assets	23,296,000	[10]			23,296,000	[10]			26,883,000	[10]
Current Risk Management Liabilities	3,477,000	[10]			3,477,000	[10]			7,029,000	[10]
Long-term Risk Management Liabilities	2,554,000	[10]			2,554,000	[10]			6,946,000	[10]
Total Liabilities	6,031,000	[10]			6,031,000	[10]			13,975,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	17,265,000	[10]			17,265,000	[10]			12,908,000	[10]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	9,299,000	[10]			9,299,000	[10]			3,082,000	[10]
Long-term Risk Management Assets	0	[10]			0	[10]			0	[10]
Total Assets	9,299,000	[10]			9,299,000	[10]			3,082,000	[10]
Current Risk Management Liabilities	0	[10]			0	[10]			0	[10]
Long-term Risk Management Liabilities	0	[10]			0	[10]			0	[10]
Total Liabilities	0	[10]			0	[10]			0	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	9,299,000	[10]			9,299,000	[10]			3,082,000	[10]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	522,000	[10]			522,000	[10]			1,167,000	[10]
Long-term Risk Management Assets	0	[10]			0	[10]			0	[10]
Total Assets	522,000	[10]			522,000	[10]			1,167,000	[10]
Current Risk Management Liabilities	102,000	[10]			102,000	[10]			85,000	[10]
Long-term Risk Management Liabilities	0	[10]			0	[10]			0	[10]
Total Liabilities	102,000	[10]			102,000	[10]			85,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	420,000	[10]			420,000	[10]			1,082,000	[10]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	506,000	[10]			506,000	[10]			1,179,000	[10]
Long-term Risk Management Assets	0	[10]			0	[10]			0	[10]
Total Assets	506,000	[10]			506,000	[10]			1,179,000	[10]
Current Risk Management Liabilities	17,000	[10]			17,000	[10]			0	[10]
Long-term Risk Management Liabilities	0	[10]			0	[10]			0	[10]
Total Liabilities	17,000	[10]			17,000	[10]			0	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	489,000	[10]			489,000	[10]			1,179,000	[10]
Power [Member]
Commodity:
Derivative, Energy Notional Amount	430,000,000				430,000,000				406,000,000
Power [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	67,059,000				67,059,000				48,995,000
Power [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	48,352,000				48,352,000				33,231,000
Power [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	32,686,000				32,686,000				34,843,000
Power [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Energy Notional Amount	14,744,000				14,744,000				13,469,000
Power [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	18,668,000				18,668,000				17,057,000
Coal [Member]
Commodity:
Derivative, Mass Notional Amount	3,000,000				3,000,000				4,000,000
Coal [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	465,000				465,000				31,000
Coal [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	1,778,000				1,778,000				3,389,000
Coal [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	0				0				0
Coal [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Mass Notional Amount	500,000				500,000				1,013,000
Coal [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	917,000				917,000				1,692,000
Natural Gas [Member]
Commodity:
Derivative, Energy Notional Amount	116,000,000				116,000,000				127,000,000
Natural Gas [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	1,540,000				1,540,000				2,477,000
Natural Gas [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	1,030,000				1,030,000				1,680,000
Natural Gas [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	0				0				0
Natural Gas [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Energy Notional Amount	68,000				68,000				0
Natural Gas [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	87,000				87,000				0
Heating Oil and Gasoline [Member]
Commodity:
Derivative, Volume Notional Amount	5,000,000				5,000,000				6,000,000
Heating Oil and Gasoline [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	891,000				891,000				1,089,000
Heating Oil and Gasoline [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	427,000				427,000				521,000
Heating Oil and Gasoline [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	907,000				907,000				1,108,000
Heating Oil and Gasoline [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Volume Notional Amount	502,000				502,000				614,000
Heating Oil and Gasoline [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	572,000				572,000				699,000
Interest Rate Contract [Member]
Commodity:
Derivative, Notional Amount	176,000,000				176,000,000				191,000,000
Interest Rate Contract [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Notional Amount	8,041,000				8,041,000				12,720,000
Interest Rate Contract [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Notional Amount	5,454,000				5,454,000				8,627,000
Interest Rate Contract [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Notional Amount	0				0				0
Interest Rate Contract [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Notional Amount	0				0				0
Interest Rate Contract [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Notional Amount	0				0				0
Vertically Integrated Utilities Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	4,000,000		4,000,000		22,000,000		10,000,000
Generation & Marketing Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	16,000,000		17,000,000		48,000,000		33,000,000
Electric Generation, Transmission and Distribution Revenues [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	1,184,000		194,000		6,031,000		873,000
Electric Generation, Transmission and Distribution Revenues [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	1,323,000		2,897,000		7,479,000		7,844,000
Electric Generation, Transmission and Distribution Revenues [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	56,000		1,819,000		56,000		3,533,000
Electric Generation, Transmission and Distribution Revenues [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	63,000		169,000		127,000		216,000
Electric Generation, Transmission and Distribution Revenues [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(79,000)		302,000		(56,000)		330,000
Sales to AEP Affiliates [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0				0
Sales to AEP Affiliates [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(300,000)				(521,000)
Sales to AEP Affiliates [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0				0
Sales to AEP Affiliates [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	300,000				521,000
Sales to AEP Affiliates [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0				0
Regulatory Assets [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0	[11]	(8,000,000)	[11]	0	[11]	(6,000,000)	[11]
Regulatory Assets [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0	[11]	(974,000)	[11]	4,000	[11]	0	[11]
Regulatory Assets [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0	[11]	(1,585,000)	[11]	0	[11]	(1,099,000)	[11]
Regulatory Assets [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0	[11]	(4,492,000)	[11]	0	[11]	(5,697,000)	[11]
Regulatory Assets [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(12,000)	[11]	192,000	[11]	(10,000)	[11]	2,202,000	[11]
Regulatory Assets [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(16,000)	[11]	(373,000)	[11]	(13,000)	[11]	(102,000)	[11]
Regulatory Liabilities [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	29,000,000	[11]	4,000,000	[11]	118,000,000	[11]	(2,000,000)	[11]
Regulatory Liabilities [Member] | Appalachian Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	13,718,000	[11]	1,230,000	[11]	46,050,000	[11]	(210,000)	[11]
Regulatory Liabilities [Member] | Indiana Michigan Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	8,793,000	[11]	(880,000)	[11]	27,110,000	[11]	(6,062,000)	[11]
Regulatory Liabilities [Member] | Ohio Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	6,404,000	[11]	3,360,000	[11]	41,503,000	[11]	3,360,000	[11]
Regulatory Liabilities [Member] | Public Service Co Of Oklahoma [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(669,000)	[11]	(1,000)	[11]	(189,000)	[11]	0	[11]
Regulatory Liabilities [Member] | Southwestern Electric Power Co [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	$ (1,019,000)	[11]	$ 39,000	[11]	$ 311,000	[11]	$ 135,000	[11]

[1] Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the condensed balance sheets.

[2] Amounts in ''Other'' column primarily represent counterparty netting of risk management and hedging contracts and associated cash collateral under the accounting guidance for ''Derivatives and Hedging.''

[3] The June 30, 2014 maturity of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), is as follows: Level 1 matures $1 million in 2014, ($11) million in periods 2015-2017 and ($1) million in periods 2018-2019; Level 2 matures $21 million in 2014, $65 million in periods 2015-2017, $10 million in periods 2018-2019 and $4 million in periods 2020-2030; Level 3 matures $42 million in 2014, $45 million in periods 2015-2017, $14 million in periods 2018-2019 and $24 million in periods 2020-2030. Risk management commodity contracts are substantially comprised of power contracts.

[4] The December 31, 2013 maturity of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), is as follows: Level 1 matures $4 million in 2014, ($11) million in periods 2015-2017 and ($1) million in periods 2018-2019; Level 2 matures $25 million in 2014, $37 million in periods 2015-2017, $7 million in periods 2018-2019 and $5 million in periods 2020-2030; Level 3 matures $27 million in 2014, $60 million in periods 2015-2017, $14 million in periods 2018-2019 and $19 million in periods 2020-2030. Risk management commodity contracts are substantially comprised of power contracts.

[5] Amounts in “Other” column primarily represent counterparty netting of risk management and hedging contracts and associated cash collateral under the accounting guidance for “Derivatives and Hedging.”

[6] Substantially comprised of power contracts for APCo, I&M and OPCo and coal contracts for PSO and SWEPCo.

[7] Derivative instruments within these categories are reported gross. These instruments are subject to master netting agreements and are presented on the condensed balance sheets on a net basis in accordance with the accounting guidance for "Derivatives and Hedging."

[8] Amounts primarily include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging." Amounts also include de-designated risk management contracts.

[9] Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging."

[10] There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

[11] Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.