Derivatives and Hedging (Details) (USD $)	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	$ 5,000,000				$ 5,000,000				$ 7,000,000
Cash Collateral Paid Netted Against Risk Management Liabilities	26,000,000				26,000,000				50,000,000
Fair Value of Derivative Instruments
Current Risk Management Assets	171,000,000				171,000,000				191,000,000
Long-term Risk Management Assets	314,000,000				314,000,000				368,000,000
Total Assets	485,000,000				485,000,000				559,000,000
Current Risk Management Liabilities	102,000,000				102,000,000				155,000,000
Long-term Risk Management Liabilities	182,000,000				182,000,000				214,000,000
Total Liabilities	284,000,000				284,000,000				369,000,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	8,000,000		13,000,000		43,000,000		24,000,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	9,000,000	[1]			9,000,000	[1]			24,000,000	[1]
Hedging Liabilities	13,000,000	[1]			13,000,000	[1]			73,000,000	[1]
AOCI Gain (Loss) Net of Tax	(25,000,000)				(25,000,000)				(38,000,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(6,000,000)				(12,000,000)
Maximum Term for Exposure to Variability of Future Cash Flows					27 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	3,000,000				3,000,000				7,000,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	39,000,000				39,000,000				32,000,000
Amount Attributable to RTO and ISO Activities	38,000,000				38,000,000				31,000,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements	341,000,000				341,000,000				469,000,000
Amount of Cash Collateral Posted	1,000,000				1,000,000				8,000,000
Additional Settlement Liability if Cross Default Provision is Triggered	258,000,000				258,000,000				328,000,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	5,000,000				5,000,000				7,000,000
Cash Collateral Paid Netted Against Risk Management Liabilities	26,000,000				26,000,000				50,000,000
Maximum Term for Exposure to Variability of Future Cash Flows					27 months
Gain (Loss) on Fair Value Hedging Instrument	4,000,000		1,000,000		(8,000,000)		3,000,000
Gain (Loss) on Fair Value Portion of Long Term Debt	(4,000,000)		(1,000,000)		8,000,000		(3,000,000)
Appalachian Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	116,000				116,000				1,262,000
Cash Collateral Paid Netted Against Risk Management Liabilities	5,608,000				5,608,000				11,029,000
Fair Value of Derivative Instruments
Current Risk Management Assets	24,550,000				24,550,000				30,960,000
Long-term Risk Management Assets	20,839,000				20,839,000				34,360,000
Total Assets	45,389,000				45,389,000				65,320,000
Current Risk Management Liabilities	11,641,000				11,641,000				16,698,000
Long-term Risk Management Liabilities	12,081,000				12,081,000				18,476,000
Total Liabilities	23,722,000				23,722,000				35,174,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(204,000)		(1,432,000)		459,000		1,485,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	850,000				850,000				2,159,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	6,183,000				6,183,000				3,699,000
Amount Attributable to RTO and ISO Activities	5,812,000				5,812,000				3,510,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements	27,044,000				27,044,000				49,465,000
Amount of Cash Collateral Posted	0				0				1,822,000
Additional Settlement Liability if Cross Default Provision is Triggered	22,162,000				22,162,000				30,160,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	116,000				116,000				1,262,000
Cash Collateral Paid Netted Against Risk Management Liabilities	5,608,000				5,608,000				11,029,000
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Indiana Michigan Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	76,000				76,000				867,000
Cash Collateral Paid Netted Against Risk Management Liabilities	3,688,000				3,688,000				7,576,000
Fair Value of Derivative Instruments
Current Risk Management Assets	16,150,000				16,150,000				26,974,000
Long-term Risk Management Assets	13,733,000				13,733,000				23,569,000
Total Assets	29,883,000				29,883,000				50,543,000
Current Risk Management Liabilities	9,268,000				9,268,000				31,517,000
Long-term Risk Management Liabilities	8,307,000				8,307,000				13,898,000
Total Liabilities	17,575,000				17,575,000				45,415,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(1,954,000)		(2,666,000)		(1,271,000)		3,829,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	560,000				560,000				1,483,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	4,069,000				4,069,000				2,540,000
Amount Attributable to RTO and ISO Activities	3,824,000				3,824,000				2,411,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements	17,796,000				17,796,000				53,499,000
Amount of Cash Collateral Posted	0				0				1,252,000
Additional Settlement Liability if Cross Default Provision is Triggered	14,583,000				14,583,000				40,240,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	76,000				76,000				867,000
Cash Collateral Paid Netted Against Risk Management Liabilities	3,688,000				3,688,000				7,576,000
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Ohio Power Co [Member]
Cash Collateral Netting
Cash Collateral Received Netted Against Risk Management Assets	159,000				159,000				1,774,000
Cash Collateral Paid Netted Against Risk Management Liabilities	7,693,000				7,693,000				15,500,000
Fair Value of Derivative Instruments
Current Risk Management Assets	34,178,000				34,178,000				44,313,000
Long-term Risk Management Assets	28,594,000				28,594,000				48,288,000
Total Assets	62,772,000				62,772,000				92,601,000
Current Risk Management Liabilities	16,431,000				16,431,000				24,155,000
Long-term Risk Management Liabilities	16,577,000				16,577,000				25,965,000
Total Liabilities	33,008,000				33,008,000				50,120,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(1,198,000)		(3,701,000)		(2,000)		2,482,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	1,167,000				1,167,000				3,034,000
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	8,484,000				8,484,000				5,198,000
Amount Attributable to RTO and ISO Activities	7,975,000				7,975,000				4,933,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements	37,110,000				37,110,000				69,516,000
Amount of Cash Collateral Posted	0				0				2,561,000
Additional Settlement Liability if Cross Default Provision is Triggered	30,410,000				30,410,000				42,386,000
Derivatives and Hedging (Textuals) [Abstract]
Cash Collateral Received Netted Against Risk Management Assets	159,000				159,000				1,774,000
Cash Collateral Paid Netted Against Risk Management Liabilities	7,693,000				7,693,000				15,500,000
Maximum Term for Exposure to Variability of Future Cash Flows					15 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	7,000				7,000				0
Fair Value of Derivative Instruments
Current Risk Management Assets	852,000				852,000				509,000
Long-term Risk Management Assets	149,000				149,000				31,000
Total Assets	1,001,000				1,001,000				540,000
Current Risk Management Liabilities	1,388,000				1,388,000				5,848,000
Long-term Risk Management Liabilities	0				0				31,000
Total Liabilities	1,388,000				1,388,000				5,879,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	1,003,000		671,000		3,421,000		(5,126,000)
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	0				0				0
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	255,000				255,000				1,509,000
Amount Attributable to RTO and ISO Activities	200,000				200,000				1,429,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements	5,000				5,000				0
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	5,000				5,000				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	7,000				7,000				0
Maximum Term for Exposure to Variability of Future Cash Flows					15 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	8,000				8,000				0
Fair Value of Derivative Instruments
Current Risk Management Assets	402,000				402,000				695,000
Long-term Risk Management Assets	21,000				21,000				0
Total Assets	423,000				423,000				695,000
Current Risk Management Liabilities	296,000				296,000				1,128,000
Total Liabilities	296,000				296,000				1,128,000
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	602,000		300,000		965,000		(6,545,000)
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Collateral Triggering Events [Abstract]
Liabilities for Derivative Contracts with Credit Downgrade Triggers	0				0				0
Amount of Collateral AEP Subsidiaries Would Have Been Required to Post	315,000				315,000				1,778,000
Amount Attributable to RTO and ISO Activities	247,000				247,000				1,683,000
Liabilities for Contracts with Cross Default Provisions Prior to Contractural Netting Arrangements	6,000				6,000				0
Amount of Cash Collateral Posted	0				0				0
Additional Settlement Liability if Cross Default Provision is Triggered	6,000				6,000				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	8,000				8,000				0
Maximum Term for Exposure to Variability of Future Cash Flows					15 months
Risk Management Contracts [Member]
Fair Value of Derivative Instruments
Total Assets	462,000,000	[2],[3]			462,000,000	[2],[3]			517,000,000	[2],[4]
Total Liabilities	259,000,000	[2],[3]			259,000,000	[2],[3]			292,000,000	[2],[4]
Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	45,082,000	[2],[5]			45,082,000	[2],[5]			65,018,000	[2],[5]
Total Liabilities	23,292,000	[2],[5]			23,292,000	[2],[5]			33,819,000	[2],[5]
Risk Management Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	29,684,000	[2],[5]			29,684,000	[2],[5]			50,343,000	[2],[5]
Total Liabilities	17,297,000	[2],[5]			17,297,000	[2],[5]			24,960,000	[2],[5]
Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	62,354,000	[2],[5]			62,354,000	[2],[5]			92,185,000	[2],[5]
Total Liabilities	32,423,000	[2],[5]			32,423,000	[2],[5]			48,217,000	[2],[5]
Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Total Assets	991,000	[2],[5]			991,000	[2],[5]			515,000	[2],[5]
Total Liabilities	1,372,000	[2],[5]			1,372,000	[2],[5]			5,879,000	[2],[5]
Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Total Assets	411,000	[2],[5]			411,000	[2],[5]			671,000	[2],[5]
Total Liabilities	277,000	[2],[5]			277,000	[2],[5]			1,128,000	[2],[5]
Commodity [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	9,000,000	[1]			9,000,000	[1]			24,000,000	[1]
Hedging Liabilities	11,000,000	[1]			11,000,000	[1]			36,000,000	[1]
AOCI Gain (Loss) Net of Tax	(1,000,000)				(1,000,000)				(8,000,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(2,000,000)				(8,000,000)
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	307,000	[1]			307,000	[1]			302,000	[1]
Hedging Liabilities	430,000	[1]			430,000	[1]			1,355,000	[1]
AOCI Gain (Loss) Net of Tax	(34,000)				(34,000)				(644,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(172,000)				(507,000)
Commodity [Member] | Indiana Michigan Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	199,000	[1]			199,000	[1]			200,000	[1]
Hedging Liabilities	278,000	[1]			278,000	[1]			931,000	[1]
AOCI Gain (Loss) Net of Tax	(19,000)				(19,000)				(446,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(113,000)				(355,000)
Commodity [Member] | Ohio Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	418,000	[1]			418,000	[1]			416,000	[1]
Hedging Liabilities	585,000	[1]			585,000	[1]			1,903,000	[1]
AOCI Gain (Loss) Net of Tax	(47,000)				(47,000)				(912,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(236,000)				(720,000)
Commodity [Member] | Public Service Co Of Oklahoma [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	10,000	[1]			10,000	[1]			25,000	[1]
Hedging Liabilities	16,000	[1]			16,000	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	(3,000)				(3,000)				21,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					1,000				21,000
Commodity [Member] | Southwestern Electric Power Co [Member]
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	12,000	[1]			12,000	[1]			24,000	[1]
Hedging Liabilities	19,000	[1]			19,000	[1]			0	[1]
AOCI Gain (Loss) Net of Tax	(3,000)				(3,000)				22,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					1,000				22,000
Commodity [Member] | Risk Management Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	441,000,000	[6]			441,000,000	[6]			589,000,000	[6]
Long-term Risk Management Assets	433,000,000	[6]			433,000,000	[6]			528,000,000	[6]
Total Assets	874,000,000	[6]			874,000,000	[6]			1,117,000,000	[6]
Current Risk Management Liabilities	389,000,000	[6]			389,000,000	[6]			546,000,000	[6]
Long-term Risk Management Liabilities	301,000,000	[6]			301,000,000	[6]			383,000,000	[6]
Total Liabilities	690,000,000	[6]			690,000,000	[6]			929,000,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	184,000,000	[6]			184,000,000	[6]			188,000,000	[6]
Commodity [Member] | Risk Management Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	68,593,000	[6]			68,593,000	[6]			127,645,000	[6]
Long-term Risk Management Assets	32,501,000	[6]			32,501,000	[6]			60,498,000	[6]
Total Assets	101,094,000	[6]			101,094,000	[6]			188,143,000	[6]
Current Risk Management Liabilities	59,793,000	[6]			59,793,000	[6]			119,430,000	[6]
Long-term Risk Management Liabilities	25,003,000	[6]			25,003,000	[6]			47,281,000	[6]
Total Liabilities	84,796,000	[6]			84,796,000	[6]			166,711,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	16,298,000	[6]			16,298,000	[6]			21,432,000	[6]
Commodity [Member] | Risk Management Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	44,988,000	[6]			44,988,000	[6]			93,268,000	[6]
Long-term Risk Management Assets	21,432,000	[6]			21,432,000	[6]			41,553,000	[6]
Total Assets	66,420,000	[6]			66,420,000	[6]			134,821,000	[6]
Current Risk Management Liabilities	40,809,000	[6]			40,809,000	[6]			82,433,000	[6]
Long-term Risk Management Liabilities	16,836,000	[6]			16,836,000	[6]			33,714,000	[6]
Total Liabilities	57,645,000	[6]			57,645,000	[6]			116,147,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	8,775,000	[6]			8,775,000	[6]			18,674,000	[6]
Commodity [Member] | Risk Management Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	96,628,000	[6]			96,628,000	[6]			183,064,000	[6]
Long-term Risk Management Assets	44,597,000	[6]			44,597,000	[6]			85,023,000	[6]
Total Assets	141,225,000	[6]			141,225,000	[6]			268,087,000	[6]
Current Risk Management Liabilities	84,519,000	[6]			84,519,000	[6]			171,397,000	[6]
Long-term Risk Management Liabilities	34,309,000	[6]			34,309,000	[6]			66,448,000	[6]
Total Liabilities	118,828,000	[6]			118,828,000	[6]			237,845,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	22,397,000	[6]			22,397,000	[6]			30,242,000	[6]
Commodity [Member] | Risk Management Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	1,394,000	[6]			1,394,000	[6]			1,657,000	[6]
Long-term Risk Management Assets	149,000	[6]			149,000	[6]			0	[6]
Total Assets	1,543,000	[6]			1,543,000	[6]			1,657,000	[6]
Current Risk Management Liabilities	1,931,000	[6]			1,931,000	[6]			7,021,000	[6]
Long-term Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Total Liabilities	1,931,000	[6]			1,931,000	[6]			7,021,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(388,000)	[6]			(388,000)	[6]			(5,364,000)	[6]
Commodity [Member] | Risk Management Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	1,444,000	[6]			1,444,000	[6]			2,804,000	[6]
Long-term Risk Management Assets	21,000	[6]			21,000	[6]			0	[6]
Total Assets	1,465,000	[6]			1,465,000	[6]			2,804,000	[6]
Current Risk Management Liabilities	1,339,000	[6]			1,339,000	[6]			3,261,000	[6]
Long-term Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Total Liabilities	1,339,000	[6]			1,339,000	[6]			3,261,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	126,000	[6]			126,000	[6]			(457,000)	[6]
Commodity [Member] | Hedging Contracts [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	19,000,000	[6]			19,000,000	[6]			32,000,000	[6]
Long-term Risk Management Assets	6,000,000	[6]			6,000,000	[6]			5,000,000	[6]
Total Assets	25,000,000	[6]			25,000,000	[6]			37,000,000	[6]
Current Risk Management Liabilities	23,000,000	[6]			23,000,000	[6]			43,000,000	[6]
Long-term Risk Management Liabilities	4,000,000	[6]			4,000,000	[6]			6,000,000	[6]
Total Liabilities	27,000,000	[6]			27,000,000	[6]			49,000,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(2,000,000)	[6]			(2,000,000)	[6]			(12,000,000)	[6]
Commodity [Member] | Hedging Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	233,000	[6]			233,000	[6]			338,000	[6]
Long-term Risk Management Assets	226,000	[6]			226,000	[6]			215,000	[6]
Total Assets	459,000	[6]			459,000	[6]			553,000	[6]
Current Risk Management Liabilities	567,000	[6]			567,000	[6]			1,182,000	[6]
Long-term Risk Management Liabilities	15,000	[6]			15,000	[6]			424,000	[6]
Total Liabilities	582,000	[6]			582,000	[6]			1,606,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(123,000)	[6]			(123,000)	[6]			(1,053,000)	[6]
Commodity [Member] | Hedging Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	149,000	[6]			149,000	[6]			220,000	[6]
Long-term Risk Management Assets	149,000	[6]			149,000	[6]			148,000	[6]
Total Assets	298,000	[6]			298,000	[6]			368,000	[6]
Current Risk Management Liabilities	370,000	[6]			370,000	[6]			807,000	[6]
Long-term Risk Management Liabilities	7,000	[6]			7,000	[6]			292,000	[6]
Total Liabilities	377,000	[6]			377,000	[6]			1,099,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(79,000)	[6]			(79,000)	[6]			(731,000)	[6]
Commodity [Member] | Hedging Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	315,000	[6]			315,000	[6]			464,000	[6]
Long-term Risk Management Assets	310,000	[6]			310,000	[6]			303,000	[6]
Total Assets	625,000	[6]			625,000	[6]			767,000	[6]
Current Risk Management Liabilities	774,000	[6]			774,000	[6]			1,658,000	[6]
Long-term Risk Management Liabilities	18,000	[6]			18,000	[6]			596,000	[6]
Total Liabilities	792,000	[6]			792,000	[6]			2,254,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(167,000)	[6]			(167,000)	[6]			(1,487,000)	[6]
Commodity [Member] | Hedging Contracts [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	13,000	[6]			13,000	[6]			42,000	[6]
Long-term Risk Management Assets	0	[6]			0	[6]			0	[6]
Total Assets	13,000	[6]			13,000	[6]			42,000	[6]
Current Risk Management Liabilities	12,000	[6]			12,000	[6]			17,000	[6]
Long-term Risk Management Liabilities	7,000	[6]			7,000	[6]			0	[6]
Total Liabilities	19,000	[6]			19,000	[6]			17,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(6,000)	[6]			(6,000)	[6]			25,000	[6]
Commodity [Member] | Hedging Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	15,000	[6]			15,000	[6]			41,000	[6]
Long-term Risk Management Assets	0	[6]			0	[6]			0	[6]
Total Assets	15,000	[6]			15,000	[6]			41,000	[6]
Current Risk Management Liabilities	14,000	[6]			14,000	[6]			17,000	[6]
Long-term Risk Management Liabilities	8,000	[6]			8,000	[6]			0	[6]
Total Liabilities	22,000	[6]			22,000	[6]			17,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(7,000)	[6]			(7,000)	[6]			24,000	[6]
Interest Rate and Foreign Currency [Member]
Commodity:
Derivative, Notional Amount	820,000,000				820,000,000				1,199,000,000
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]			37,000,000	[1]
AOCI Gain (Loss) Net of Tax	(24,000,000)				(24,000,000)				(30,000,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(4,000,000)				(4,000,000)
Interest Rate and Foreign Currency [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Notional Amount	0				0				0
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	2,836,000				2,836,000				2,077,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(930,000)				(1,013,000)
Interest Rate and Foreign Currency [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Notional Amount	0				0				200,000,000
Impact of Cash Flow Hedges on the Condensed Balance Sheet
Hedging Assets	0	[1]			0	[1]			0	[1]
Hedging Liabilities	0	[1]			0	[1]			19,524,000	[1]
AOCI Gain (Loss) Net of Tax	(16,386,000)				(16,386,000)				(19,647,000)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					(1,640,000)				(1,600,000)
Interest Rate and Foreign Currency [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Notional Amount	0				0				0
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	7,076,000				7,076,000				8,095,000
Portion Expected to be Reclassified to Net Income During the Next Twelve Months					1,359,000				1,359,000
Interest Rate and Foreign Currency [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Notional Amount	0				0				0
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	5,891,000				5,891,000				6,460,000
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]
Commodity:
Derivative, Notional Amount	0				0				0
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	(13,871,000)				(13,871,000)				(15,571,000)
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	[6]			4,000,000	[6]			3,000,000	[6]
Long-term Risk Management Assets	1,000,000	[6]			1,000,000	[6]			1,000,000	[6]
Total Assets	5,000,000	[6]			5,000,000	[6]			4,000,000	[6]
Current Risk Management Liabilities	1,000,000	[6]			1,000,000	[6]			35,000,000	[6]
Long-term Risk Management Liabilities	13,000,000	[6]			13,000,000	[6]			6,000,000	[6]
Total Liabilities	14,000,000	[6]			14,000,000	[6]			41,000,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	(9,000,000)	[6]			(9,000,000)	[6]			(37,000,000)	[6]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[6]			0	[6]			0	[6]
Long-term Risk Management Assets	0	[6]			0	[6]			0	[6]
Total Assets	0	[6]			0	[6]			0	[6]
Current Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Long-term Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Total Liabilities	0	[6]			0	[6]			0	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[6]			0	[6]			0	[6]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[6]			0	[6]			0	[6]
Long-term Risk Management Assets	0	[6]			0	[6]			0	[6]
Total Assets	0	[6]			0	[6]			0	[6]
Current Risk Management Liabilities	0	[6]			0	[6]			19,524,000	[6]
Long-term Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Total Liabilities	0	[6]			0	[6]			19,524,000	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[6]			0	[6]			(19,524,000)	[6]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[6]			0	[6]			0	[6]
Long-term Risk Management Assets	0	[6]			0	[6]			0	[6]
Total Assets	0	[6]			0	[6]			0	[6]
Current Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Long-term Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Total Liabilities	0	[6]			0	[6]			0	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[6]			0	[6]			0	[6]
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	[6]			0	[6]			0	[6]
Long-term Risk Management Assets	0	[6]			0	[6]			0	[6]
Total Assets	0	[6]			0	[6]			0	[6]
Current Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Long-term Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Total Liabilities	0	[6]			0	[6]			0	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[6]			0	[6]			0	[6]
Interest Rate and Foreign Currency [Member] | Hedging Contracts [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	0	[6]			0	[6]			0	[6]
Long-term Risk Management Assets	0	[6]			0	[6]			0	[6]
Total Assets	0	[6]			0	[6]			0	[6]
Current Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Long-term Risk Management Liabilities	0	[6]			0	[6]			0	[6]
Total Liabilities	0	[6]			0	[6]			0	[6]
Total MTM Derivative Contract Net Assets (Liabilities)	0	[6]			0	[6]			0	[6]
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	464,000,000				464,000,000				624,000,000
Long-term Risk Management Assets	440,000,000				440,000,000				534,000,000
Total Assets	904,000,000				904,000,000				1,158,000,000
Current Risk Management Liabilities	413,000,000				413,000,000				624,000,000
Long-term Risk Management Liabilities	318,000,000				318,000,000				395,000,000
Total Liabilities	731,000,000				731,000,000				1,019,000,000
Total MTM Derivative Contract Net Assets (Liabilities)	173,000,000				173,000,000				139,000,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	68,826,000				68,826,000				127,983,000
Long-term Risk Management Assets	32,727,000				32,727,000				60,713,000
Total Assets	101,553,000				101,553,000				188,696,000
Current Risk Management Liabilities	60,360,000				60,360,000				120,612,000
Long-term Risk Management Liabilities	25,018,000				25,018,000				47,705,000
Total Liabilities	85,378,000				85,378,000				168,317,000
Total MTM Derivative Contract Net Assets (Liabilities)	16,175,000				16,175,000				20,379,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	45,137,000				45,137,000				93,488,000
Long-term Risk Management Assets	21,581,000				21,581,000				41,701,000
Total Assets	66,718,000				66,718,000				135,189,000
Current Risk Management Liabilities	41,179,000				41,179,000				102,764,000
Long-term Risk Management Liabilities	16,843,000				16,843,000				34,006,000
Total Liabilities	58,022,000				58,022,000				136,770,000
Total MTM Derivative Contract Net Assets (Liabilities)	8,696,000				8,696,000				(1,581,000)
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	96,943,000				96,943,000				183,528,000
Long-term Risk Management Assets	44,907,000				44,907,000				85,326,000
Total Assets	141,850,000				141,850,000				268,854,000
Current Risk Management Liabilities	85,293,000				85,293,000				173,055,000
Long-term Risk Management Liabilities	34,327,000				34,327,000				67,044,000
Total Liabilities	119,620,000				119,620,000				240,099,000
Total MTM Derivative Contract Net Assets (Liabilities)	22,230,000				22,230,000				28,755,000
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Public Service Co Of Oklahoma [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	1,407,000				1,407,000				1,699,000
Long-term Risk Management Assets	149,000				149,000				0
Total Assets	1,556,000				1,556,000				1,699,000
Current Risk Management Liabilities	1,943,000				1,943,000				7,038,000
Long-term Risk Management Liabilities	7,000				7,000				0
Total Liabilities	1,950,000				1,950,000				7,038,000
Total MTM Derivative Contract Net Assets (Liabilities)	(394,000)				(394,000)				(5,339,000)
Gross Amounts of Risk Management Assets/Liabilities Recognized [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	1,459,000				1,459,000				2,845,000
Long-term Risk Management Assets	21,000				21,000				0
Total Assets	1,480,000				1,480,000				2,845,000
Current Risk Management Liabilities	1,353,000				1,353,000				3,278,000
Long-term Risk Management Liabilities	8,000				8,000				0
Total Liabilities	1,361,000				1,361,000				3,278,000
Total MTM Derivative Contract Net Assets (Liabilities)	119,000				119,000				(433,000)
Gross Amounts Offset in the Statement of Financial Position [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(293,000,000)	[7]			(293,000,000)	[7]			(433,000,000)	[7]
Long-term Risk Management Assets	(126,000,000)	[7]			(126,000,000)	[7]			(166,000,000)	[7]
Total Assets	(419,000,000)	[7]			(419,000,000)	[7]			(599,000,000)	[7]
Current Risk Management Liabilities	(311,000,000)	[7]			(311,000,000)	[7]			(469,000,000)	[7]
Long-term Risk Management Liabilities	(136,000,000)	[7]			(136,000,000)	[7]			(181,000,000)	[7]
Total Liabilities	(447,000,000)	[7]			(447,000,000)	[7]			(650,000,000)	[7]
Total MTM Derivative Contract Net Assets (Liabilities)	28,000,000	[7]			28,000,000	[7]			51,000,000	[7]
Gross Amounts Offset in the Statement of Financial Position [Member] | Appalachian Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(44,276,000)	[8]			(44,276,000)	[8]			(97,023,000)	[8]
Long-term Risk Management Assets	(11,888,000)	[8]			(11,888,000)	[8]			(26,353,000)	[8]
Total Assets	(56,164,000)	[8]			(56,164,000)	[8]			(123,376,000)	[8]
Current Risk Management Liabilities	(48,719,000)	[8]			(48,719,000)	[8]			(103,914,000)	[8]
Long-term Risk Management Liabilities	(12,937,000)	[8]			(12,937,000)	[8]			(29,229,000)	[8]
Total Liabilities	(61,656,000)	[8]			(61,656,000)	[8]			(133,143,000)	[8]
Total MTM Derivative Contract Net Assets (Liabilities)	5,492,000	[8]			5,492,000	[8]			9,767,000	[8]
Gross Amounts Offset in the Statement of Financial Position [Member] | Indiana Michigan Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(28,987,000)	[8]			(28,987,000)	[8]			(66,514,000)	[8]
Long-term Risk Management Assets	(7,848,000)	[8]			(7,848,000)	[8]			(18,132,000)	[8]
Total Assets	(36,835,000)	[8]			(36,835,000)	[8]			(84,646,000)	[8]
Current Risk Management Liabilities	(31,911,000)	[8]			(31,911,000)	[8]			(71,247,000)	[8]
Long-term Risk Management Liabilities	(8,536,000)	[8]			(8,536,000)	[8]			(20,108,000)	[8]
Total Liabilities	(40,447,000)	[8]			(40,447,000)	[8]			(91,355,000)	[8]
Total MTM Derivative Contract Net Assets (Liabilities)	3,612,000	[8]			3,612,000	[8]			6,709,000	[8]
Gross Amounts Offset in the Statement of Financial Position [Member] | Ohio Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(62,765,000)	[8]			(62,765,000)	[8]			(139,215,000)	[8]
Long-term Risk Management Assets	(16,313,000)	[8]			(16,313,000)	[8]			(37,038,000)	[8]
Total Assets	(79,078,000)	[8]			(79,078,000)	[8]			(176,253,000)	[8]
Current Risk Management Liabilities	(68,862,000)	[8]			(68,862,000)	[8]			(148,900,000)	[8]
Long-term Risk Management Liabilities	(17,750,000)	[8]			(17,750,000)	[8]			(41,079,000)	[8]
Total Liabilities	(86,612,000)	[8]			(86,612,000)	[8]			(189,979,000)	[8]
Total MTM Derivative Contract Net Assets (Liabilities)	7,534,000	[8]			7,534,000	[8]			13,726,000	[8]
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	(555,000)	[8]			(555,000)	[8]			(1,190,000)	[8]
Long-term Risk Management Assets	0	[8]			0	[8]			31,000	[8]
Total Assets	(555,000)	[8]			(555,000)	[8]			(1,159,000)	[8]
Current Risk Management Liabilities	(555,000)	[8]			(555,000)	[8]			(1,190,000)	[8]
Long-term Risk Management Liabilities	(7,000)	[8]			(7,000)	[8]			31,000	[8]
Total Liabilities	(562,000)	[8]			(562,000)	[8]			(1,159,000)	[8]
Total MTM Derivative Contract Net Assets (Liabilities)	7,000	[8]			7,000	[8]			0	[8]
Gross Amounts Offset in the Statement of Financial Position [Member] | Southwestern Electric Power Co [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	(1,057,000)	[8]			(1,057,000)	[8]			(2,150,000)	[8]
Long-term Risk Management Assets	0	[8]			0	[8]			0	[8]
Total Assets	(1,057,000)	[8]			(1,057,000)	[8]			(2,150,000)	[8]
Current Risk Management Liabilities	(1,057,000)	[8]			(1,057,000)	[8]			(2,150,000)	[8]
Long-term Risk Management Liabilities	(8,000)	[8]			(8,000)	[8]			0	[8]
Total Liabilities	(1,065,000)	[8]			(1,065,000)	[8]			(2,150,000)	[8]
Total MTM Derivative Contract Net Assets (Liabilities)	8,000	[8]			8,000	[8]			0	[8]
Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position [Member]
Fair Value of Derivative Instruments
Current Risk Management Assets	171,000,000	[9]			171,000,000	[9]			191,000,000	[9]
Long-term Risk Management Assets	314,000,000	[9]			314,000,000	[9]			368,000,000	[9]
Total Assets	485,000,000	[9]			485,000,000	[9]			559,000,000	[9]
Current Risk Management Liabilities	102,000,000	[9]			102,000,000	[9]			155,000,000	[9]
Long-term Risk Management Liabilities	182,000,000	[9]			182,000,000	[9]			214,000,000	[9]
Total Liabilities	284,000,000	[9]			284,000,000	[9]			369,000,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	201,000,000	[9]			201,000,000	[9]			190,000,000	[9]
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	24,550,000	[9]			24,550,000	[9]			30,960,000	[9]
Long-term Risk Management Assets	20,839,000	[9]			20,839,000	[9]			34,360,000	[9]
Total Assets	45,389,000	[9]			45,389,000	[9]			65,320,000	[9]
Current Risk Management Liabilities	11,641,000	[9]			11,641,000	[9]			16,698,000	[9]
Long-term Risk Management Liabilities	12,081,000	[9]			12,081,000	[9]			18,476,000	[9]
Total Liabilities	23,722,000	[9]			23,722,000	[9]			35,174,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	21,667,000	[9]			21,667,000	[9]			30,146,000	[9]
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	16,150,000	[9]			16,150,000	[9]			26,974,000	[9]
Long-term Risk Management Assets	13,733,000	[9]			13,733,000	[9]			23,569,000	[9]
Total Assets	29,883,000	[9]			29,883,000	[9]			50,543,000	[9]
Current Risk Management Liabilities	9,268,000	[9]			9,268,000	[9]			31,517,000	[9]
Long-term Risk Management Liabilities	8,307,000	[9]			8,307,000	[9]			13,898,000	[9]
Total Liabilities	17,575,000	[9]			17,575,000	[9]			45,415,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	12,308,000	[9]			12,308,000	[9]			5,128,000	[9]
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	34,178,000	[9]			34,178,000	[9]			44,313,000	[9]
Long-term Risk Management Assets	28,594,000	[9]			28,594,000	[9]			48,288,000	[9]
Total Assets	62,772,000	[9]			62,772,000	[9]			92,601,000	[9]
Current Risk Management Liabilities	16,431,000	[9]			16,431,000	[9]			24,155,000	[9]
Long-term Risk Management Liabilities	16,577,000	[9]			16,577,000	[9]			25,965,000	[9]
Total Liabilities	33,008,000	[9]			33,008,000	[9]			50,120,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	29,764,000	[9]			29,764,000	[9]			42,481,000	[9]
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	852,000	[9]			852,000	[9]			509,000	[9]
Long-term Risk Management Assets	149,000	[9]			149,000	[9]			31,000	[9]
Total Assets	1,001,000	[9]			1,001,000	[9]			540,000	[9]
Current Risk Management Liabilities	1,388,000	[9]			1,388,000	[9]			5,848,000	[9]
Long-term Risk Management Liabilities	0	[9]			0	[9]			31,000	[9]
Total Liabilities	1,388,000	[9]			1,388,000	[9]			5,879,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	(387,000)	[9]			(387,000)	[9]			(5,339,000)	[9]
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	402,000	[9]			402,000	[9]			695,000	[9]
Long-term Risk Management Assets	21,000	[9]			21,000	[9]			0	[9]
Total Assets	423,000	[9]			423,000	[9]			695,000	[9]
Current Risk Management Liabilities	296,000	[9]			296,000	[9]			1,128,000	[9]
Long-term Risk Management Liabilities	0	[9]			0	[9]			0	[9]
Total Liabilities	296,000	[9]			296,000	[9]			1,128,000	[9]
Total MTM Derivative Contract Net Assets (Liabilities)	127,000	[9]			127,000	[9]			(433,000)	[9]
Power [Member]
Commodity:
Derivative, Energy Notional Amount	464,000,000				464,000,000				498,000,000
Power [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	75,861,000				75,861,000				94,059,000
Power [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	49,918,000				49,918,000				64,791,000
Power [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	104,093,000				104,093,000				132,188,000
Power [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Energy Notional Amount	8,000				8,000				0
Power [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	10,000				10,000				0
Coal [Member]
Commodity:
Derivative, Mass Notional Amount	6,000,000				6,000,000				10,000,000
Coal [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	282,000				282,000				1,401,000
Coal [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	3,980,000				3,980,000				2,711,000
Coal [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	813,000				813,000				3,033,000
Coal [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Mass Notional Amount	2,075,000				2,075,000				1,980,000
Coal [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Mass Notional Amount	1,229,000				1,229,000				1,312,000
Natural Gas [Member]
Commodity:
Derivative, Energy Notional Amount	141,000,000				141,000,000				147,000,000
Natural Gas [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	4,121,000				4,121,000				10,077,000
Natural Gas [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	2,711,000				2,711,000				6,922,000
Natural Gas [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Energy Notional Amount	5,654,000				5,654,000				14,163,000
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	981,000				981,000				1,050,000
Heating Oil and Gasoline [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	484,000				484,000				532,000
Heating Oil and Gasoline [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	1,155,000				1,155,000				1,260,000
Heating Oil and Gasoline [Member] | Public Service Co Of Oklahoma [Member]
Commodity:
Derivative, Volume Notional Amount	491,000				491,000				616,000
Heating Oil and Gasoline [Member] | Southwestern Electric Power Co [Member]
Commodity:
Derivative, Volume Notional Amount	603,000				603,000				585,000
Interest Rate Contract [Member]
Commodity:
Derivative, Notional Amount	201,000,000				201,000,000				235,000,000
Interest Rate Contract [Member] | Appalachian Power Co [Member]
Commodity:
Derivative, Notional Amount	16,501,000				16,501,000				24,146,000
Interest Rate Contract [Member] | Indiana Michigan Power Co [Member]
Commodity:
Derivative, Notional Amount	10,858,000				10,858,000				16,584,000
Interest Rate Contract [Member] | Ohio Power Co [Member]
Commodity:
Derivative, Notional Amount	22,642,000				22,642,000				33,934,000
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
Utility Operations Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	4,000,000		5,000,000		17,000,000		19,000,000
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	746,000		378,000		1,619,000		(548,000)
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	1,742,000		3,814,000		9,586,000		9,206,000
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	66,000		87,000		3,599,000		11,118,000
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	25,000		71,000		241,000		231,000
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	51,000		174,000		381,000		426,000
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		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	0		0		0		0
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		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	0		0		0		0
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		0		0
Other Revenues [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	9,000,000		20,000,000		39,000,000		28,000,000
Fuel and Other Consumables Used for Electric Generation [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		0		0
Fuel and Other Consumables Used for Electric Generation [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		0		0		0
Fuel and Other Consumables Used for Electric Generation [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		0		0
Fuel and Other Consumables Used for Electric Generation [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	0		0		0		0
Fuel and Other Consumables Used for Electric Generation [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		0		0
Regulatory Assets [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	0	[10]	2,000,000	[10]	(3,000,000)	[10]	(35,000,000)	[10]
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	[10]	(138,000)	[10]	0	[10]	(6,133,000)	[10]
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	(1,349,000)	[10]	(1,213,000)	[10]	(1,648,000)	[10]	(7,228,000)	[10]
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	[10]	3,000,000	[10]	(5,158,000)	[10]	(9,026,000)	[10]
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	960,000	[10]	598,000	[10]	3,162,000	[10]	(5,360,000)	[10]
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	421,000	[10]	115,000	[10]	427,000	[10]	(6,977,000)	[10]
Regulatory Liabilities [Member]
Amount of Gain (Loss) Recognized on Risk Management Contracts
Amount of Gain (Loss) Recognized on Risk Management Contracts	(5,000,000)	[10]	(14,000,000)	[10]	(10,000,000)	[10]	12,000,000	[10]
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	(950,000)	[10]	(1,672,000)	[10]	(1,160,000)	[10]	8,166,000	[10]
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	(2,347,000)	[10]	(5,267,000)	[10]	(9,209,000)	[10]	1,851,000	[10]
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	(1,264,000)	[10]	(6,788,000)	[10]	1,557,000	[10]	390,000	[10]
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	18,000	[10]	2,000	[10]	18,000	[10]	3,000	[10]
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	$ 130,000	[10]	$ 11,000	[10]	$ 157,000	[10]	$ 6,000	[10]

[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, 2013 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 2013, ($3) million in periods 2014-2016 and ($4) million in periods 2017-2018; Level 2 matures $4 million in 2013, $48 million in periods 2014-2016, $8 million in periods 2017-2018 and $7 million in periods 2019-2030; Level 3 matures $6 million in 2013, $60 million in periods 2014-2016, $32 million in periods 2017-2018 and $25 million in periods 2019-2030. Risk management commodity contracts are substantially comprised of power contracts.

[4] The December 31, 2012 maturity of the net fair value of risk management contracts prior to cash collateral, assets/(liabilities), is as follows: Level 1 matures $9 million in 2013, ($3) million in periods 2014-2016 and ($4) million in periods 2017-2018; Level 2 matures $16 million in 2013, $61 million in periods 2014-2016, $16 million in periods 2017-2018 and $7 million in periods 2019-2030; Level 3 matures $18 million in 2013, $31 million in periods 2014-2016, $13 million in periods 2017-2018 and $24 million in periods 2019-2030. 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] 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."

[7] 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.

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

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

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