Derivatives and Hedging (Details) (USD $)	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	$ 20,000,000				$ 20,000,000				$ 4,000,000
Cash Collateral Paid Netted Against Risk Management Liabilities	6,000,000				6,000,000				13,000,000
Fair Value of Derivative Instruments
Current Risk Management Assets	135,000,000				135,000,000				160,000,000
Long-term Risk Management Assets	228,000,000				228,000,000				297,000,000
Total Assets	363,000,000				363,000,000				457,000,000
Current Risk Management Liabilities	60,000,000				60,000,000				90,000,000
Long-term Risk Management Liabilities	120,000,000				120,000,000				177,000,000
Total Liabilities	180,000,000				180,000,000				267,000,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	15,000,000		8,000,000		203,000,000		43,000,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	9,000,000	[1]			9,000,000	[1]			7,000,000	[1]
Hedging Liabilities	4,000,000	[1]			4,000,000	[1]			8,000,000	[1]
AOCI Gain (Loss) Net of Tax	(17,000,000)				(17,000,000)				(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					63 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	144,000,000				144,000,000				33,000,000
Amount Attributable to RTO and ISO Activities	35,000,000				35,000,000				28,000,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	189,000,000				189,000,000				293,000,000
Amount of Cash Collateral Posted	0				0				1,000,000
Additional Settlement Liability if Cross Default Provision is Triggered	147,000,000				147,000,000				235,000,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	20,000,000				20,000,000				4,000,000
Cash Collateral Paid Netted Against Risk Management Liabilities	6,000,000				6,000,000				13,000,000
Maximum Term for Exposure to Variability of Future Cash Flows					63 months
Gain (Loss) on Fair Value Hedging Instrument	(2,000,000)		4,000,000		2,000,000		(8,000,000)
Gain (Loss) on Fair Value Portion of Long Term Debt	2,000,000		(4,000,000)		(2,000,000)		8,000,000
Appalachian Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	441,000				441,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	261,000				261,000				2,993,000
Fair Value of Derivative Instruments
Current Risk Management Assets	21,819,000				21,819,000				21,171,000
Long-term Risk Management Assets	6,501,000				6,501,000				16,948,000
Total Assets									38,119,000
Current Risk Management Liabilities	6,371,000				6,371,000				8,892,000
Long-term Risk Management Liabilities	3,293,000				3,293,000				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	(4,946,000)		(204,000)		47,139,000		459,000
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	157,000				157,000				575,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	2,721,000				2,721,000				2,747,000
Amount Attributable to RTO and ISO Activities	2,697,000				2,697,000				2,539,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	7,769,000				7,769,000				19,648,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	7,219,000				7,219,000				18,568,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	441,000				441,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	261,000				261,000				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	154,000				154,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	151,000				151,000				2,030,000
Fair Value of Derivative Instruments
Current Risk Management Assets	16,330,000				16,330,000				15,388,000
Long-term Risk Management Assets	4,409,000				4,409,000				11,495,000
Total Assets									26,883,000
Current Risk Management Liabilities	3,625,000				3,625,000				7,029,000
Long-term Risk Management Liabilities	2,032,000				2,032,000				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	2,145,000		(1,954,000)		36,213,000		(1,271,000)
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	107,000				107,000				390,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	1,842,000				1,842,000				1,863,000
Amount Attributable to RTO and ISO Activities	1,829,000				1,829,000				1,722,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	5,269,000				5,269,000				13,326,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	4,897,000				4,897,000				12,594,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	154,000				154,000				0
Cash Collateral Paid Netted Against Risk Management Liabilities	151,000				151,000				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	0				0				0
Cash Collateral Paid Netted Against Risk Management Liabilities	248,000				248,000				0
Fair Value of Derivative Instruments
Current Risk Management Assets	7,917,000				7,917,000				3,082,000
Long-term Risk Management Assets	5,000				5,000				0
Total Assets									3,082,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(2,366,000)		(1,198,000)		39,193,000		(2,000)
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	0				0				0
Cash Collateral Paid Netted Against Risk Management Liabilities	248,000				248,000				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	0				0				0
Cash Collateral Paid Netted Against Risk Management Liabilities	141,000				141,000				1,000
Fair Value of Derivative Instruments
Current Risk Management Assets	563,000				563,000				1,167,000
Long-term Risk Management Assets	3,000				3,000				0
Total Assets									1,167,000
Current Risk Management Liabilities	0				0				85,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	252,000		1,003,000		701,000		3,421,000
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	49,000				49,000				0
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	4,123,000				4,123,000				2,930,000
Amount Attributable to RTO and ISO Activities	0				0				410,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	0				0				3,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	0				0				3,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	0				0				0
Cash Collateral Paid Netted Against Risk Management Liabilities	141,000				141,000				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	0				0				0
Cash Collateral Paid Netted Against Risk Management Liabilities	160,000				160,000				3,000
Fair Value of Derivative Instruments
Current Risk Management Assets	408,000				408,000				1,179,000
Long-term Risk Management Assets	3,000				3,000				0
Total Assets									1,179,000
Current Risk Management Liabilities	131,000				131,000				0
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(390,000)		602,000		(148,000)		965,000
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	60,000				60,000				0
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	176,000				176,000				713,000
Amount Attributable to RTO and ISO Activities	0				0				519,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements	0				0				3,000
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	0				0				3,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	0				0				0
Cash Collateral Paid Netted Against Risk Management Liabilities	160,000				160,000				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	348,000,000	[2],[3]			348,000,000	[2],[3]			440,000,000	[2],[4]
Total Liabilities	164,000,000	[2],[3]			164,000,000	[2],[3]			245,000,000	[2],[4]
Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	28,320,000	[5],[6]			28,320,000	[5],[6]			37,756,000	[5],[6]
Total Liabilities	9,664,000	[5],[6]			9,664,000	[5],[6]			18,846,000	[5],[6]
Risk Management Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	20,739,000	[5],[6]			20,739,000	[5],[6]			26,667,000	[5],[6]
Total Liabilities	5,657,000	[5],[6]			5,657,000	[5],[6]			13,781,000	[5],[6]
Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	7,922,000	[5],[6]			7,922,000	[5],[6]			2,920,000	[5],[6]
Total Liabilities	0	[5],[6]			0	[5],[6]			0	[5],[6]
Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Total Assets	566,000	[5],[6]			566,000	[5],[6]			1,083,000	[5],[6]
Total Liabilities	0	[5],[6]			0	[5],[6]			85,000	[5],[6]
Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	411,000	[5],[6]			411,000	[5],[6]			1,082,000	[5],[6]
Total Liabilities	131,000	[5],[6]			131,000	[5],[6]			0	[5],[6]
Commodity [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	9,000,000	[1]			9,000,000	[1]			7,000,000	[1]
Hedging Liabilities	3,000,000	[1]			3,000,000	[1]			6,000,000	[1]
AOCI Gain (Loss) Net of Tax	3,000,000				3,000,000				0
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					2,000,000				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	340,000,000	[7]			340,000,000	[7]			347,000,000	[7]
Long-term Risk Management Assets	300,000,000	[7]			300,000,000	[7]			368,000,000	[7]
Total Assets	640,000,000	[7]			640,000,000	[7]			715,000,000	[7]
Current Risk Management Liabilities	262,000,000	[7]			262,000,000	[7]			292,000,000	[7]
Long-term Risk Management Liabilities	180,000,000	[7]			180,000,000	[7]			237,000,000	[7]
Total Liabilities	442,000,000	[7]			442,000,000	[7]			529,000,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	198,000,000	[7]			198,000,000	[7]			186,000,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	31,542,000	[7]			31,542,000	[7]			46,431,000	[7]
Long-term Risk Management Assets	7,937,000	[7]			7,937,000	[7]			20,948,000	[7]
Total Assets	39,479,000	[7]			39,479,000	[7]			67,379,000	[7]
Current Risk Management Liabilities	16,086,000	[7]			16,086,000	[7]			37,010,000	[7]
Long-term Risk Management Liabilities	4,557,000	[7]			4,557,000	[7]			14,452,000	[7]
Total Liabilities	20,643,000	[7]			20,643,000	[7]			51,462,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	18,836,000	[7]			18,836,000	[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	23,289,000	[7]			23,289,000	[7]			33,229,000	[7]
Long-term Risk Management Assets	5,383,000	[7]			5,383,000	[7]			14,208,000	[7]
Total Assets	28,672,000	[7]			28,672,000	[7]			47,437,000	[7]
Current Risk Management Liabilities	10,705,000	[7]			10,705,000	[7]			26,779,000	[7]
Long-term Risk Management Liabilities	2,882,000	[7]			2,882,000	[7]			9,802,000	[7]
Total Liabilities	13,587,000	[7]			13,587,000	[7]			36,581,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	15,085,000	[7]			15,085,000	[7]			10,856,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	7,889,000	[7]			7,889,000	[7]			3,269,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	7,889,000	[7]			7,889,000	[7]			3,269,000	[7]
Current Risk Management Liabilities	180,000	[7]			180,000	[7]			349,000	[7]
Long-term Risk Management Liabilities	35,000	[7]			35,000	[7]			0	[7]
Total Liabilities	215,000	[7]			215,000	[7]			349,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	7,674,000	[7]			7,674,000	[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	595,000	[7]			595,000	[7]			1,078,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	595,000	[7]			595,000	[7]			1,078,000	[7]
Current Risk Management Liabilities	152,000	[7]			152,000	[7]			81,000	[7]
Long-term Risk Management Liabilities	18,000	[7]			18,000	[7]			0	[7]
Total Liabilities	170,000	[7]			170,000	[7]			81,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	425,000	[7]			425,000	[7]			997,000	[7]
Commodity [Member] | Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	468,000	[7]			468,000	[7]			1,233,000	[7]
Long-term Risk Management Assets	0	[7]			0	[7]			0	[7]
Total Assets	468,000	[7]			468,000	[7]			1,233,000	[7]
Current Risk Management Liabilities	327,000	[7]			327,000	[7]			154,000	[7]
Long-term Risk Management Liabilities	21,000	[7]			21,000	[7]			0	[7]
Total Liabilities	348,000	[7]			348,000	[7]			154,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	120,000	[7]			120,000	[7]			1,079,000	[7]
Commodity [Member] | Hedging Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	17,000,000	[7]			17,000,000	[7]			12,000,000	[7]
Long-term Risk Management Assets	4,000,000	[7]			4,000,000	[7]			3,000,000	[7]
Total Assets	21,000,000	[7]			21,000,000	[7]			15,000,000	[7]
Current Risk Management Liabilities	12,000,000	[7]			12,000,000	[7]			11,000,000	[7]
Long-term Risk Management Liabilities	3,000,000	[7]			3,000,000	[7]			3,000,000	[7]
Total Liabilities	15,000,000	[7]			15,000,000	[7]			14,000,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	6,000,000	[7]			6,000,000	[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	815,000,000				815,000,000				820,000,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	1,000,000	[1]			1,000,000	[1]			2,000,000	[1]
AOCI Gain (Loss) Net of Tax	(20,000,000)				(20,000,000)				(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	3,766,000				3,766,000				3,090,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(38,000)				(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	(14,745,000)				(14,745,000)				(15,976,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(1,140,000)				(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	5,945,000				5,945,000				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	5,132,000				5,132,000				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	(11,602,000)				(11,602,000)				(13,304,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(2,132,000)				(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	12,000,000	[7]			12,000,000	[7]			15,000,000	[7]
Total Liabilities	13,000,000	[7]			13,000,000	[7]			16,000,000	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	(9,000,000)	[7]			(9,000,000)	[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	361,000,000				361,000,000				363,000,000
Long-term Risk Management Assets	304,000,000				304,000,000				371,000,000
Total Assets	665,000,000				665,000,000				734,000,000
Current Risk Management Liabilities	275,000,000				275,000,000				304,000,000
Long-term Risk Management Liabilities	195,000,000				195,000,000				255,000,000
Total Liabilities	470,000,000				470,000,000				559,000,000
Total MTM Derivative Contract Net Assets (Liabilities)	195,000,000				195,000,000				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	31,542,000				31,542,000				46,820,000
Long-term Risk Management Assets	7,937,000				7,937,000				20,948,000
Total Assets	39,479,000				39,479,000				67,768,000
Current Risk Management Liabilities	16,086,000				16,086,000				37,323,000
Long-term Risk Management Liabilities	4,557,000				4,557,000				14,452,000
Total Liabilities	20,643,000				20,643,000				51,775,000
Total MTM Derivative Contract Net Assets (Liabilities)	18,836,000				18,836,000				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	23,289,000				23,289,000				33,463,000
Long-term Risk Management Assets	5,383,000				5,383,000				14,208,000
Total Assets	28,672,000				28,672,000				47,671,000
Current Risk Management Liabilities	10,705,000				10,705,000				26,991,000
Long-term Risk Management Liabilities	2,882,000				2,882,000				9,802,000
Total Liabilities	13,587,000				13,587,000				36,793,000
Total MTM Derivative Contract Net Assets (Liabilities)	15,085,000				15,085,000				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	7,889,000				7,889,000				3,431,000
Long-term Risk Management Assets	0				0				0
Total Assets	7,889,000				7,889,000				3,431,000
Current Risk Management Liabilities	180,000				180,000				349,000
Long-term Risk Management Liabilities	35,000				35,000				0
Total Liabilities	215,000				215,000				349,000
Total MTM Derivative Contract Net Assets (Liabilities)	7,674,000				7,674,000				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	595,000				595,000				1,162,000
Long-term Risk Management Assets	0				0				0
Total Assets	595,000				595,000				1,162,000
Current Risk Management Liabilities	152,000				152,000				81,000
Long-term Risk Management Liabilities	18,000				18,000				0
Total Liabilities	170,000				170,000				81,000
Total MTM Derivative Contract Net Assets (Liabilities)	425,000				425,000				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	468,000				468,000				1,330,000
Long-term Risk Management Assets	0				0				0
Total Assets	468,000				468,000				1,330,000
Current Risk Management Liabilities	327,000				327,000				154,000
Long-term Risk Management Liabilities	21,000				21,000				0
Total Liabilities	348,000				348,000				154,000
Total MTM Derivative Contract Net Assets (Liabilities)	120,000				120,000				1,176,000
Gross Amounts Offset in the Statement of Financial Position [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(226,000,000)	[8]			(226,000,000)	[8]			(203,000,000)	[8]
Long-term Risk Management Assets	(76,000,000)	[8]			(76,000,000)	[8]			(74,000,000)	[8]
Total Assets	(302,000,000)	[8]			(302,000,000)	[8]			(277,000,000)	[8]
Current Risk Management Liabilities	(215,000,000)	[8]			(215,000,000)	[8]			(214,000,000)	[8]
Long-term Risk Management Liabilities	(75,000,000)	[8]			(75,000,000)	[8]			(78,000,000)	[8]
Total Liabilities	(290,000,000)	[8]			(290,000,000)	[8]			(292,000,000)	[8]
Total MTM Derivative Contract Net Assets (Liabilities)	(12,000,000)	[8]			(12,000,000)	[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	(9,723,000)	[9]			(9,723,000)	[9]			(25,649,000)	[9]
Long-term Risk Management Assets	(1,436,000)	[9]			(1,436,000)	[9]			(4,000,000)	[9]
Total Assets	(11,159,000)	[9]			(11,159,000)	[9]			(29,649,000)	[9]
Current Risk Management Liabilities	(9,715,000)	[9]			(9,715,000)	[9]			(28,431,000)	[9]
Long-term Risk Management Liabilities	(1,264,000)	[9]			(1,264,000)	[9]			(4,211,000)	[9]
Total Liabilities	(10,979,000)	[9]			(10,979,000)	[9]			(32,642,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(180,000)	[9]			(180,000)	[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	(6,959,000)	[9]			(6,959,000)	[9]			(18,075,000)	[9]
Long-term Risk Management Assets	(974,000)	[9]			(974,000)	[9]			(2,713,000)	[9]
Total Assets	(7,933,000)	[9]			(7,933,000)	[9]			(20,788,000)	[9]
Current Risk Management Liabilities	(7,080,000)	[9]			(7,080,000)	[9]			(19,962,000)	[9]
Long-term Risk Management Liabilities	(850,000)	[9]			(850,000)	[9]			(2,856,000)	[9]
Total Liabilities	(7,930,000)	[9]			(7,930,000)	[9]			(22,818,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(3,000)	[9]			(3,000)	[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	28,000	[9]			28,000	[9]			(349,000)	[9]
Long-term Risk Management Assets	5,000	[9]			5,000	[9]			0	[9]
Total Assets	33,000	[9]			33,000	[9]			(349,000)	[9]
Current Risk Management Liabilities	(180,000)	[9]			(180,000)	[9]			(349,000)	[9]
Long-term Risk Management Liabilities	(35,000)	[9]			(35,000)	[9]			0	[9]
Total Liabilities	(215,000)	[9]			(215,000)	[9]			(349,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	248,000	[9]			248,000	[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	(32,000)	[9]			(32,000)	[9]			5,000	[9]
Long-term Risk Management Assets	3,000	[9]			3,000	[9]			0	[9]
Total Assets	(29,000)	[9]			(29,000)	[9]			5,000	[9]
Current Risk Management Liabilities	(152,000)	[9]			(152,000)	[9]			4,000	[9]
Long-term Risk Management Liabilities	(18,000)	[9]			(18,000)	[9]			0	[9]
Total Liabilities	(170,000)	[9]			(170,000)	[9]			4,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	141,000	[9]			141,000	[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	(60,000)	[9]			(60,000)	[9]			(151,000)	[9]
Long-term Risk Management Assets	3,000	[9]			3,000	[9]			0	[9]
Total Assets	(57,000)	[9]			(57,000)	[9]			(151,000)	[9]
Current Risk Management Liabilities	(196,000)	[9]			(196,000)	[9]			(154,000)	[9]
Long-term Risk Management Liabilities	(21,000)	[9]			(21,000)	[9]			0	[9]
Total Liabilities	(217,000)	[9]			(217,000)	[9]			(154,000)	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	160,000	[9]			160,000	[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	135,000,000	[10]			135,000,000	[10]			160,000,000	[10]
Long-term Risk Management Assets	228,000,000	[10]			228,000,000	[10]			297,000,000	[10]
Total Assets	363,000,000	[10]			363,000,000	[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	120,000,000	[10]			120,000,000	[10]			177,000,000	[10]
Total Liabilities	180,000,000	[10]			180,000,000	[10]			267,000,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	183,000,000	[10]			183,000,000	[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	21,819,000	[10]			21,819,000	[10]			21,171,000	[10]
Long-term Risk Management Assets	6,501,000	[10]			6,501,000	[10]			16,948,000	[10]
Total Assets	28,320,000	[10]			28,320,000	[10]			38,119,000	[10]
Current Risk Management Liabilities	6,371,000	[10]			6,371,000	[10]			8,892,000	[10]
Long-term Risk Management Liabilities	3,293,000	[10]			3,293,000	[10]			10,241,000	[10]
Total Liabilities	9,664,000	[10]			9,664,000	[10]			19,133,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	18,656,000	[10]			18,656,000	[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	16,330,000	[10]			16,330,000	[10]			15,388,000	[10]
Long-term Risk Management Assets	4,409,000	[10]			4,409,000	[10]			11,495,000	[10]
Total Assets	20,739,000	[10]			20,739,000	[10]			26,883,000	[10]
Current Risk Management Liabilities	3,625,000	[10]			3,625,000	[10]			7,029,000	[10]
Long-term Risk Management Liabilities	2,032,000	[10]			2,032,000	[10]			6,946,000	[10]
Total Liabilities	5,657,000	[10]			5,657,000	[10]			13,975,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	15,082,000	[10]			15,082,000	[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	7,917,000	[10]			7,917,000	[10]			3,082,000	[10]
Long-term Risk Management Assets	5,000	[10]			5,000	[10]			0	[10]
Total Assets	7,922,000	[10]			7,922,000	[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)	7,922,000	[10]			7,922,000	[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	563,000	[10]			563,000	[10]			1,167,000	[10]
Long-term Risk Management Assets	3,000	[10]			3,000	[10]			0	[10]
Total Assets	566,000	[10]			566,000	[10]			1,167,000	[10]
Current Risk Management Liabilities	0	[10]			0	[10]			85,000	[10]
Long-term Risk Management Liabilities	0	[10]			0	[10]			0	[10]
Total Liabilities	0	[10]			0	[10]			85,000	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	566,000	[10]			566,000	[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	408,000	[10]			408,000	[10]			1,179,000	[10]
Long-term Risk Management Assets	3,000	[10]			3,000	[10]			0	[10]
Total Assets	411,000	[10]			411,000	[10]			1,179,000	[10]
Current Risk Management Liabilities	131,000	[10]			131,000	[10]			0	[10]
Long-term Risk Management Liabilities	0	[10]			0	[10]			0	[10]
Total Liabilities	131,000	[10]			131,000	[10]			0	[10]
Total MTM Derivative Contract Net Assets (Liabilities)	280,000	[10]			280,000	[10]			1,179,000	[10]
Power [Member]
Commodity:
Derivative, Energy Notional Amount	348,000,000				348,000,000				406,000,000
Power [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	50,109,000				50,109,000				48,995,000
Power [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	36,076,000				36,076,000				33,231,000
Power [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	23,709,000				23,709,000				34,843,000
Power [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Energy Notional Amount	6,486,000				6,486,000				13,469,000
Power [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	7,918,000				7,918,000				17,057,000
Coal [Member]
Commodity:
Derivative, Mass Notional Amount	2,000,000				2,000,000				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	889,000				889,000				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	250,000				250,000				1,013,000
Coal [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	542,000				542,000				1,692,000
Natural Gas [Member]
Commodity:
Derivative, Energy Notional Amount	112,000,000				112,000,000				127,000,000
Natural Gas [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	811,000				811,000				2,477,000
Natural Gas [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	550,000				550,000				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	0				0				0
Natural Gas [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	0				0				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	990,000				990,000				1,089,000
Heating Oil and Gasoline [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	474,000				474,000				521,000
Heating Oil and Gasoline [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	1,007,000				1,007,000				1,108,000
Heating Oil and Gasoline [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Volume Notional Amount	558,000				558,000				614,000
Heating Oil and Gasoline [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	636,000				636,000				699,000
Interest Rate Contract [Member]
Commodity:
Derivative, Notional Amount	162,000,000				162,000,000				191,000,000
Interest Rate Contract [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Notional Amount	6,894,000				6,894,000				12,720,000
Interest Rate Contract [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Notional Amount	4,676,000				4,676,000				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	7,000,000		3,000,000		29,000,000		13,000,000
Generation & Marketing Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	21,000,000		10,000,000		69,000,000		43,000,000
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	1,231,000		746,000		7,262,000		1,619,000
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	2,988,000		1,742,000		10,467,000		9,586,000
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	41,000		66,000		97,000		3,599,000
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	45,000		25,000		172,000		241,000
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	74,000		51,000		18,000		381,000
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	(196,000)				(717,000)
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	196,000				717,000
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	(6,000,000)	[11]	(1,000,000)	[11]	(6,000,000)	[11]	(3,000,000)	[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	(2,571,000)	[11]	0	[11]	(2,567,000)	[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	(471,000)	[11]	(1,349,000)	[11]	(471,000)	[11]	(1,648,000)	[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	(852,000)	[11]	0	[11]	(215,000)	[11]	(5,158,000)	[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	(109,000)	[11]	960,000	[11]	(119,000)	[11]	3,162,000	[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	(284,000)	[11]	421,000	[11]	(285,000)	[11]	427,000	[11]
Regulatory Liabilities [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(7,000,000)	[11]	(4,000,000)	[11]	111,000,000	[11]	(10,000,000)	[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	(3,606,000)	[11]	(950,000)	[11]	42,444,000	[11]	(1,160,000)	[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	(176,000)	[11]	(2,347,000)	[11]	26,934,000	[11]	(9,209,000)	[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	(1,555,000)	[11]	(1,264,000)	[11]	39,311,000	[11]	1,557,000	[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	120,000	[11]	18,000	[11]	(69,000)	[11]	18,000	[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	$ (180,000)	[11]	$ 130,000	[11]	$ 119,000	[11]	$ 157,000	[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 September 30, 2014 maturity of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), is as follows: Level 1 matures ($12) million in periods 2015-2017 and ($1) million in periods 2018-2019; Level 2 matures $6 million in 2014, $67 million in periods 2015-2017, $9 million in periods 2018-2019 and $4 million in periods 2020-2030; Level 3 matures $38 million in 2014, $46 million in periods 2015-2017, $16 million in periods 2018-2019 and $25 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] Substantially comprised of power contracts for APCo, I&M and OPCo and coal contracts for PSO and SWEPCo.

[6] 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.”

[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.