Effects of Regulation

12 Months Ended

Dec. 31, 2011

Effects of Regulation [Abstract]

Effects of Regulation

4. EFFECTS OF REGULATION

Regulatory assets are comprised of the following items:

			December 31,				Remaining
			2011		2010		Recovery Period
Current Regulatory Assets			(in millions)
Under-recovered Fuel Costs - earns a return			$	56	$	73	1 year
Under-recovered Fuel Costs - does not earn a return				9		8	1 year
Total Current Regulatory Assets			$	65	$	81
Noncurrent Regulatory Assets
Regulatory assets not yet being recovered pending future
	proceedings to determine the recovery method and timing:
	Regulatory Assets Currently Earning a Return
		Storm Related Costs	$	24	$	55
		Economic Development Rider		13		6
		Customer Choice Deferrals		-		59
		Line Extension Carrying Costs		-		55
		Acquisition of Monongahela Power		-		8
		Other Regulatory Assets Not Yet Being Recovered		-		1
	Regulatory Assets Currently Not Earning a Return
		Deferred Wind Power Costs		38		29
		Environmental Rate Adjustment Clause		18		56
		Mountaineer Carbon Capture and Storage Product Validation Facility		14		60
		Special Rate Mechanism for Century Aluminum		13		13
		Litigation Settlement		11		-
		Storm Related Costs		10		45
		Acquisition of Monongahela Power		-		4
		Other Regulatory Assets Not Yet Being Recovered		14		4
Total Regulatory Assets Not Yet Being Recovered				155		395
Regulatory assets being recovered:
	Regulatory Assets Currently Earning a Return
		Capacity Auction True-Up		692		-	13 years
		Fuel Adjustment Clause		521		476	7 years
		Expanded Net Energy Charge		327		361	2 years
		Distribution Asset Recovery Rider		173		-	7 years
		Unamortized Loss on Reacquired Debt		92		93	32 years
		Storm Related Costs		65		38	7 years
		Meter Replacement Costs		39		4	29 years
		Transmission Cost Recovery Rider		28		-	2 years
		RTO Formation/Integration Costs		18		21	8 years
		Economic Development Rider		12		1	1 year
		Red Rock Generating Facility		10		10	45 years
		Other Regulatory Assets Being Recovered		15		17	various
	Regulatory Assets Currently Not Earning a Return
		Pension and OPEB Funded Status		2,308		2,161	13 years
		Income Taxes, Net		1,237		1,097	37 years
		Postemployment Benefits		47		51	4 years
		Cook Nuclear Plant Refueling Outage Levelization		41		54	2 years
		Storm Related Costs		35		21	7 years
		Expanded Net Energy Charge		32		-	6 years
		Environmental Rate Adjustment Clause		24		-	2 years
		Deferred PJM Fees		22		7	1 year
		Transmission Rate Adjustment Clause		20		19	2 years
		Deferred Restructuring Costs		18		6	7 years
		Unrealized Loss on Forward Commitments		16		10	2 years
		Asset Retirement Obligation		14		15	9 years
		Vegetation Management		11		13	1 year
		Restructuring Transition Costs		8		14	5 years
		Off-system Sales Margin Sharing		-		13
		Other Regulatory Assets Being Recovered		46		46	various
Total Regulatory Assets Being Recovered				5,871		4,548
Total Noncurrent Regulatory Assets			$	6,026	$	4,943

Regulatory liabilities are comprised of the following items:

				December 31,				Remaining
				2011		2010		Refund Period
Current Regulatory Liabilities				(in millions)
Over-recovered Fuel Costs - pays a return				$	5	$	16	1 year
Over-recovered Fuel Costs - does not pay a return					3		1	1 year
Total Current Regulatory Liabilities				$	8	$	17
Noncurrent Regulatory Liabilities and
Deferred Investment Tax Credits
Regulatory liabilities not yet being paid:
	Regulatory Liabilities Currently Paying a Return
		Refundable Construction Financing Costs		$	53	$	20
		Other Regulatory Liabilities Not Yet Being Paid			5		-
	Regulatory Liabilities Currently Not Paying a Return
		Over-recovery of Costs Related to gridSMART®			4		10
		Other Regulatory Liabilities Not Yet Being Paid			4		11
Total Regulatory Liabilities Not Yet Being Paid					66		41
Regulatory liabilities being paid:
	Regulatory Liabilities Currently Paying a Return
		Asset Removal Costs			2,270		2,222	(a)
		Advanced Metering Infrastructure Surcharge			78		61	9 years
		Deferred Investment Tax Credits			27		32	11 years
		Excess Earnings			13		13	42 years
		Other Regulatory Liabilities Being Paid			4		4	various
	Regulatory Liabilities Currently Not Paying a Return
		Excess Asset Retirement Obligations for Nuclear Decommissioning
			Liability		377		354	(b)
		Deferred Investment Tax Credits			144		242	75 years
		Spent Nuclear Fuel Liability			43		42	(b)
		Unrealized Gain on Forward Commitments			41		60	5 years
		Over-recovery of Transition Charges			41		38	10 years
		Energy Efficiency/Peak Demand Reduction			40		10	1 year
		Deferred State Income Tax Coal Credits			29		29	10 years
		Over-recovery of PJM Expenses			-		12
		Other Regulatory Liabilities Being Paid			22		11	various
Total Regulatory Liabilities Being Paid					3,129		3,130
Total Noncurrent Regulatory Liabilities and Deferred Investment Tax
	Credits			$	3,195	$	3,171
(a)			Relieved as removal costs are incurred.
(b)			Relieved when plant is decommissioned.

Appalachian Power Co [Member]

Effects of Regulation [Abstract]

Effects of Regulation

4. EFFECTS OF REGULATION

Regulatory assets and liabilities are comprised of the following items:

				APCo					I&M
								Remaining					Remaining
				December 31,				Recovery	December 31,				Recovery
Regulatory Assets:				2011		2010		Period	2011		2010		Period
				(in thousands)					(in thousands)
Current Regulatory Assets
Under-recovered Fuel Costs - earns a return				$	41,105	$	18,300	1 year	$	-	$	-
Under-recovered Fuel Costs - does not earn a return					-		-			8,876		8,467	1 year
Total Current Regulatory Assets				$	41,105	$	18,300		$	8,876	$	8,467
Noncurrent Regulatory Assets
Regulatory assets not yet being recovered pending
	future proceedings to determine the recovery
	method and timing:
	Regulatory Assets Currently Not Earning a Return
		Deferred Wind Power Costs		$	38,192	$	28,584		$	-	$	-
		Virginia Environmental Rate Adjustment Clause			17,950		55,724			-		-
		Mountaineer Carbon Capture and Storage
			Product Validation Facility		14,155		59,866			-		-
		Special Rate Mechanism for Century Aluminum			12,811		12,628			-		-
		Transmission Agreement Phase-In			1,925		288			-		-
		Mountaineer Carbon Capture and Storage
			Commercial Scale Facility		1,335		-			1,680		-
		Litigation Settlement			-		-			10,803		-
		Storm Related Costs			-		25,225			-		-
		Other Regulatory Assets Not Yet Being Recovered			1,010		316			-		-
Total Regulatory Assets Not Yet Being Recovered					87,378		182,631			12,483		-
Regulatory assets being recovered:
	Regulatory Assets Currently Earning a Return
		Expanded Net Energy Charge			326,766		361,314	2 years		-		-
		Storm Related Costs			25,225		-	7 years		-		-
		Unamortized Loss on Reacquired Debt			13,592		12,679	31 years		17,355		18,507	21 years
		RTO Formation/Integration Costs			5,194		5,952	8 years		3,858		4,437	8 years
		Customer Choice Implementation Costs			-		-			4,680		6,767	2 years
		Other Regulatory Assets Being Recovered			-		-			-		1,103
	Regulatory Assets Currently Not Earning a Return
		Income Taxes, Net			512,025		523,009	30 years		188,749		159,453	37 years
		Pension and OPEB Funded Status			362,322		335,105	13 years		291,392		268,080	13 years
		Expanded Net Energy Charge			31,979		-	6 years		-		-
		Virginia Environmental Rate Adjustment Clause			23,844		-	2 years		-		-
		Postemployment Benefits			22,645		25,484	4 years		9,137		8,968	4 years
		Virginia Transmission Rate Adjustment Clause			19,553		19,271	2 years		-		-
		Storm Related Costs			16,324		-	7 years		-		-
		Deferred Restructuring Costs			12,537		-	7 years		4,952		6,217	4 years
		Asset Retirement Obligation			10,524		12,560	6 years		3,396		2,700	9 years
		Deferred Wind Power Costs			6,284		-	2 years		-		-
		Virginia Environmental and Reliability Costs
			Recovery		3,838		4,421	2 years		-		-
		Cook Nuclear Plant Refueling Outage Levelization			-		-			40,551		53,795	2 years
		Deferred PJM Fees			-		-			21,746		7,078	1 year
		River Transportation Division Expenses			-		-			1,899		339	1 year
		West Virginia Reliability Expense			-		3,158			-		-
		Off-system Sales Margin Sharing			-		-			-		13,091
		Other Regulatory Assets Being Recovered			1,163		1,041	various		2,781		5,719	various
Total Regulatory Assets Being Recovered					1,393,815		1,303,994			590,496		556,254
Total Noncurrent Regulatory Assets				$	1,481,193	$	1,486,625		$	602,979	$	556,254

					APCo					I&M
									Remaining					Remaining
					December 31,				Refund	December 31,				Refund
Regulatory Liabilities:					2011		2010		Period	2011		2010		Period
					(in thousands)					(in thousands)
Current Regulatory Liabilities
Over-recovered Fuel Costs - pays a return					$	-	$	-		$	25	$	1	1 year
Total Current Regulatory Liabilities					$	-	$	-		$	25	$	1
Noncurrent Regulatory Liabilities and
Deferred Investment Tax Credits
Regulatory liabilities not yet being paid:
	Regulatory Liabilities Currently Paying a Return
		Other Regulatory Liabilities Not Yet Being Paid			$	-	$	-		$	318	$	-
	Regulatory Liabilities Currently Not Paying a Return
		Other Regulatory Liabilities Not Yet Being Paid				327		-			136		147
Total Regulatory Liabilities Not Yet Being Paid						327		-			454		147
Regulatory liabilities being paid:
	Regulatory Liabilities Currently Paying a Return
		Asset Removal Costs				526,885		500,667	(a)		362,134		357,493	(a)
		Deferred Investment Tax Credits				3,231		5,097	9 years		-		-
	Regulatory Liabilities Currently Not Paying a Return
		Deferred State Income Tax Coal Credits				28,727		28,900	10 years		-		-
		Unrealized Gain on Forward Commitments				15,597		25,799	5 years		21,785		28,045	5 years
		Deferred Investment Tax Credits				1,214		1,918	9 years		52,633		55,416	75 years
		Energy Efficiency/Peak Demand Reduction				811		-	1 year		11,078		1,287	1 year
		Excess Asset Retirement Obligations for Nuclear
			Decommissioning Liability			-		-			377,162		353,689	(b)
		Spent Nuclear Fuel Liability				-		-			42,603		41,932	(b)
		Off-system Sales Margin Sharing				-		-			5,892		-	1 year
		Indiana Clean Coal Technology Rider Liability				-		-			1,242		2,494	1 year
		Over-recovery of PJM Expenses				-		-			-		11,671
		Other Regulatory Liabilities Being Paid				-		-			219		23	various
Total Regulatory Liabilities Being Paid						576,465		562,381			874,748		852,050
Total Noncurrent Regulatory Liabilities and
	Deferred Investment Tax Credits				$	576,792	$	562,381		$	875,202	$	852,197
(a)				Relieved as removal costs are incurred.
(b)				Relieved when plant is decommissioned.

Indiana Michigan Power Co [Member]

Effects of Regulation [Abstract]

Effects of Regulation

4. EFFECTS OF REGULATION

Regulatory assets and liabilities are comprised of the following items:

				APCo					I&M
								Remaining					Remaining
				December 31,				Recovery	December 31,				Recovery
Regulatory Assets:				2011		2010		Period	2011		2010		Period
				(in thousands)					(in thousands)
Current Regulatory Assets
Under-recovered Fuel Costs - earns a return				$	41,105	$	18,300	1 year	$	-	$	-
Under-recovered Fuel Costs - does not earn a return					-		-			8,876		8,467	1 year
Total Current Regulatory Assets				$	41,105	$	18,300		$	8,876	$	8,467
Noncurrent Regulatory Assets
Regulatory assets not yet being recovered pending
	future proceedings to determine the recovery
	method and timing:
	Regulatory Assets Currently Not Earning a Return
		Deferred Wind Power Costs		$	38,192	$	28,584		$	-	$	-
		Virginia Environmental Rate Adjustment Clause			17,950		55,724			-		-
		Mountaineer Carbon Capture and Storage
			Product Validation Facility		14,155		59,866			-		-
		Special Rate Mechanism for Century Aluminum			12,811		12,628			-		-
		Transmission Agreement Phase-In			1,925		288			-		-
		Mountaineer Carbon Capture and Storage
			Commercial Scale Facility		1,335		-			1,680		-
		Litigation Settlement			-		-			10,803		-
		Storm Related Costs			-		25,225			-		-
		Other Regulatory Assets Not Yet Being Recovered			1,010		316			-		-
Total Regulatory Assets Not Yet Being Recovered					87,378		182,631			12,483		-
Regulatory assets being recovered:
	Regulatory Assets Currently Earning a Return
		Expanded Net Energy Charge			326,766		361,314	2 years		-		-
		Storm Related Costs			25,225		-	7 years		-		-
		Unamortized Loss on Reacquired Debt			13,592		12,679	31 years		17,355		18,507	21 years
		RTO Formation/Integration Costs			5,194		5,952	8 years		3,858		4,437	8 years
		Customer Choice Implementation Costs			-		-			4,680		6,767	2 years
		Other Regulatory Assets Being Recovered			-		-			-		1,103
	Regulatory Assets Currently Not Earning a Return
		Income Taxes, Net			512,025		523,009	30 years		188,749		159,453	37 years
		Pension and OPEB Funded Status			362,322		335,105	13 years		291,392		268,080	13 years
		Expanded Net Energy Charge			31,979		-	6 years		-		-
		Virginia Environmental Rate Adjustment Clause			23,844		-	2 years		-		-
		Postemployment Benefits			22,645		25,484	4 years		9,137		8,968	4 years
		Virginia Transmission Rate Adjustment Clause			19,553		19,271	2 years		-		-
		Storm Related Costs			16,324		-	7 years		-		-
		Deferred Restructuring Costs			12,537		-	7 years		4,952		6,217	4 years
		Asset Retirement Obligation			10,524		12,560	6 years		3,396		2,700	9 years
		Deferred Wind Power Costs			6,284		-	2 years		-		-
		Virginia Environmental and Reliability Costs
			Recovery		3,838		4,421	2 years		-		-
		Cook Nuclear Plant Refueling Outage Levelization			-		-			40,551		53,795	2 years
		Deferred PJM Fees			-		-			21,746		7,078	1 year
		River Transportation Division Expenses			-		-			1,899		339	1 year
		West Virginia Reliability Expense			-		3,158			-		-
		Off-system Sales Margin Sharing			-		-			-		13,091
		Other Regulatory Assets Being Recovered			1,163		1,041	various		2,781		5,719	various
Total Regulatory Assets Being Recovered					1,393,815		1,303,994			590,496		556,254
Total Noncurrent Regulatory Assets				$	1,481,193	$	1,486,625		$	602,979	$	556,254

					APCo					I&M
									Remaining					Remaining
					December 31,				Refund	December 31,				Refund
Regulatory Liabilities:					2011		2010		Period	2011		2010		Period
					(in thousands)					(in thousands)
Current Regulatory Liabilities
Over-recovered Fuel Costs - pays a return					$	-	$	-		$	25	$	1	1 year
Total Current Regulatory Liabilities					$	-	$	-		$	25	$	1
Noncurrent Regulatory Liabilities and
Deferred Investment Tax Credits
Regulatory liabilities not yet being paid:
	Regulatory Liabilities Currently Paying a Return
		Other Regulatory Liabilities Not Yet Being Paid			$	-	$	-		$	318	$	-
	Regulatory Liabilities Currently Not Paying a Return
		Other Regulatory Liabilities Not Yet Being Paid				327		-			136		147
Total Regulatory Liabilities Not Yet Being Paid						327		-			454		147
Regulatory liabilities being paid:
	Regulatory Liabilities Currently Paying a Return
		Asset Removal Costs				526,885		500,667	(a)		362,134		357,493	(a)
		Deferred Investment Tax Credits				3,231		5,097	9 years		-		-
	Regulatory Liabilities Currently Not Paying a Return
		Deferred State Income Tax Coal Credits				28,727		28,900	10 years		-		-
		Unrealized Gain on Forward Commitments				15,597		25,799	5 years		21,785		28,045	5 years
		Deferred Investment Tax Credits				1,214		1,918	9 years		52,633		55,416	75 years
		Energy Efficiency/Peak Demand Reduction				811		-	1 year		11,078		1,287	1 year
		Excess Asset Retirement Obligations for Nuclear
			Decommissioning Liability			-		-			377,162		353,689	(b)
		Spent Nuclear Fuel Liability				-		-			42,603		41,932	(b)
		Off-system Sales Margin Sharing				-		-			5,892		-	1 year
		Indiana Clean Coal Technology Rider Liability				-		-			1,242		2,494	1 year
		Over-recovery of PJM Expenses				-		-			-		11,671
		Other Regulatory Liabilities Being Paid				-		-			219		23	various
Total Regulatory Liabilities Being Paid						576,465		562,381			874,748		852,050
Total Noncurrent Regulatory Liabilities and
	Deferred Investment Tax Credits				$	576,792	$	562,381		$	875,202	$	852,197
(a)				Relieved as removal costs are incurred.
(b)				Relieved when plant is decommissioned.

Ohio Power Co [Member]

Effects of Regulation [Abstract]

Effects of Regulation

4. EFFECTS OF REGULATION

Regulatory assets and liabilities are comprised of the following items:

			OPCo
							Remaining
			December 31,				Recovery
			2011		2010		Period
Regulatory Assets:			(in thousands)
Noncurrent Regulatory Assets
Regulatory assets not yet being recovered pending future
	proceedings to determine the recovery method and timing:
	Regulatory Assets Currently Earning a Return
		Economic Development Rider	$	12,572	$	6,114
		Customer Choice Deferrals		-		58,857
		Line Extension Carrying Costs		-		54,955
		Storm Related Costs		-		30,143
		Acquisition of Monongahela Power		-		7,929
		Other Regulatory Assets Not Yet Being Recovered		-		678
	Regulatory Assets Currently Not Earning a Return
		Storm Related Costs		8,375		-
		Acquisition of Monongahela Power		-		4,052
		Other Regulatory Assets Not Yet Being Recovered		-		101
Total Regulatory Assets Not Yet Being Recovered				20,947		162,829
Regulatory assets being recovered:
	Regulatory Assets Currently Earning a Return
		Fuel Adjustment Clause		506,607		475,835	7 years
		Distribution Asset Recovery Rider		173,274		-	7 years
		Transmission Cost Recovery Rider		28,404		383	2 years
		Unamortized Loss on Reacquired Debt		14,552		15,889	27 years
		Economic Development Rider		11,738		1,406	1 year
		RTO Formation/Integration Costs		7,836		8,967	8 years
		Acquisition of Monongahela Power		-		504
	Regulatory Assets Currently Not Earning a Return
		Pension and OPEB Funded Status		389,712		363,831	13 years
		Income Taxes, Net		190,981		182,286	20 years
		Unrealized Loss on Forward Commitments		9,930		5,788	1 year
		Postemployment Benefits		8,669		8,806	4 years
		Enhanced Service Reliability Plan		4,454		3,377	1 year
		Deferred Contribution Expense		3,400		-	4 years
		Energy Efficiency/Peak Demand Reduction		-		2,221
Total Regulatory Assets Being Recovered				1,349,557		1,069,293
Total Noncurrent Regulatory Assets			$	1,370,504	$	1,232,122

				OPCo
								Remaining
				December 31,				Refund
				2011		2010		Period
Regulatory Liabilities:				(in thousands)
Noncurrent Regulatory Liabilities and Deferred Investment Tax Credits
Regulatory liabilities not yet being paid:
	Regulatory Liabilities Currently Paying a Return
		IGCC Preconstruction Costs		$	4,196	$	-
	Regulatory Liabilities Currently Not Paying a Return
		Over-recovery of Costs Related to gridSMART®			-		6,182
		Low Income Customers/Economic Recovery			-		3,420
		Other Regulatory Liabilities Not Yet Being Paid			216		3,166
Total Regulatory Liabilities Not Yet Being Paid					4,412		12,768
Regulatory liabilities being paid:
	Regulatory Liabilities Currently Paying a Return
		Asset Removal Costs			251,100		256,546	(a)
		Economic Development Rider			2,428		336	1 year
		Deferred Investment Tax Credits			549		1,085	8 years
		Transmission Cost Recovery Rider			542		2,419	1 year
	Regulatory Liabilities Currently Not Paying a Return
		Energy Efficiency/Peak Demand Reduction			19,124		2,245	3 years
		Deferred Investment Tax Credits			12,944		14,787	13 years
		Over-recovery of Costs Related to gridSMART®			7,504		-	2 years
		Low Income Customers/Economic Recovery			2,521		-	5 years
		Unrealized Gain on Forward Commitments			-		105
Total Regulatory Liabilities Being Paid					296,712		277,523
Total Noncurrent Regulatory Liabilities and Deferred Investment
	Tax Credits			$	301,124	$	290,291
(a)			Relieved as removal costs are incurred.

Public Service Co Of Oklahoma [Member]

Effects of Regulation [Abstract]

Effects of Regulation

4. EFFECTS OF REGULATION

Regulatory assets and liabilities are comprised of the following items:

				PSO					SWEPCo
								Remaining					Remaining
				December 31,				Recovery	December 31,				Recovery
				2011		2010		Period	2011		2010		Period
Regulatory Assets:				(in thousands)					(in thousands)
Current Regulatory Assets
Under-recovered Fuel Costs - earns a return				$	4,313	$	37,262	1 year	$	10,843	$	758	1 year
Noncurrent Regulatory Assets
Regulatory assets not yet being recovered pending
	future proceedings to determine the recovery
	method and timing:
	Regulatory Assets Currently Not Earning a Return
		Mountaineer Carbon Capture and Storage
			Commercial Scale Facility	$	-	$	-		$	2,380	$	-
		Storm Related Costs			-		17,256			-		1,239
		Other Regulatory Assets Not Yet Being Recovered			-		574			1,699		613
Total Regulatory Assets Not Yet Being Recovered					-		17,830			4,079		1,852
Regulatory assets being recovered:
	Regulatory Assets Currently Earning a Return
		Storm Related Costs			38,659		38,499	2 years		965		-	2 years
		Unamortized Loss on Reacquired Debt			12,538		8,277	21 years		10,768		12,422	32 years
		Red Rock Generating Facility			10,180		10,406	45 years		-		-
		Acquisition of Valley Electric Membership
			Corporation (VEMCO)		-		-			8,789		6,500	4 years
	Regulatory Assets Currently Not Earning a Return
		Pension and OPEB Funded Status			178,295		166,333	13 years		176,587		163,870	13 years
		Vegetation Management			11,196		13,303	1 year		-		-
		Deferral of Major Generation Overhauls			6,133		4,083	6 years		-		-
		Energy Efficiency/Peak Demand Reduction			4,394		3,705	1 year		1,284		495	1 year
		Income Taxes, Net			2,923		691	33 years		178,826		132,118	28 years
		Unrealized Loss on Forward Commitments			1,706		285	2 years		4,684		2,975	2 years
		Rate Case Expense			216		-	2 years		3,602		4,606	2 years
		Storm Related Costs			-		-			2,556		4,800	2 years
		Dolet Hills Deferred Fuel			-		-			1,886		2,725	3 years
		Other Regulatory Assets Being Recovered			305		133	various		250		335	various
Total Regulatory Assets Being Recovered					266,545		245,715			390,197		330,846
Total Noncurrent Regulatory Assets				$	266,545	$	263,545		$	394,276	$	332,698

				PSO					SWEPCo
								Remaining					Remaining
				December 31,				Refund	December 31,				Refund
				2011		2010		Period	2011		2010		Period
Regulatory Liabilities:				(in thousands)					(in thousands)
Current Regulatory Liabilities
Over-recovered Fuel Costs - pays a return				$	-	$	-		$	5,032	$	16,432	1 year
Noncurrent Regulatory Liabilities and
Deferred Investment Tax Credits
Regulatory liabilities not yet being paid:
	Regulatory Liabilities Currently Paying a Return
		Refundable Construction Financing Costs		$	-	$	-		$	52,594	$	20,139
	Regulatory Liabilities Currently Not Paying a Return
		Over-recovery of Costs Related to gridSMART®			4,232		3,806			-		-
		Storm Related Costs			2,248		3,493			-		-
		Other Regulatory Liabilities Not Yet Being Paid			-		-			806		806
Total Regulatory Liabilities Not Yet Being Paid					6,480		7,299			53,400		20,945
Regulatory liabilities being paid:
	Regulatory Liabilities Currently Paying a Return
		Asset Removal Costs			280,491		284,230	(a)		353,067		346,402	(a)
		Excess Earnings			-		-			3,047		3,119	42 years
		Other Regulatory Liabilities Being Paid			-		-			1,305		1,667	various
	Regulatory Liabilities Currently Not Paying a Return
		Deferred Investment Tax Credits			40,310		41,166	37 years		13,318		13,868	27 years
		Energy Efficiency/Peak Demand Reduction			6,444		4,266	1 year		-		-
		Vegetation Management			-		-			3,158		5,672	1 year
		Other Regulatory Liabilities Being Paid			1,087		-	various		1,276		2,000	various
Total Regulatory Liabilities Being Paid					328,332		329,662			375,171		372,728
Total Noncurrent Regulatory Liabilities and
	Deferred Investment Tax Credits			$	334,812	$	336,961		$	428,571	$	393,673
(a)			Relieved as removal costs are incurred.

Southwestern Electric Power Co [Member]

Effects of Regulation [Abstract]

Effects of Regulation

4. EFFECTS OF REGULATION

Regulatory assets and liabilities are comprised of the following items:

				PSO					SWEPCo
								Remaining					Remaining
				December 31,				Recovery	December 31,				Recovery
				2011		2010		Period	2011		2010		Period
Regulatory Assets:				(in thousands)					(in thousands)
Current Regulatory Assets
Under-recovered Fuel Costs - earns a return				$	4,313	$	37,262	1 year	$	10,843	$	758	1 year
Noncurrent Regulatory Assets
Regulatory assets not yet being recovered pending
	future proceedings to determine the recovery
	method and timing:
	Regulatory Assets Currently Not Earning a Return
		Mountaineer Carbon Capture and Storage
			Commercial Scale Facility	$	-	$	-		$	2,380	$	-
		Storm Related Costs			-		17,256			-		1,239
		Other Regulatory Assets Not Yet Being Recovered			-		574			1,699		613
Total Regulatory Assets Not Yet Being Recovered					-		17,830			4,079		1,852
Regulatory assets being recovered:
	Regulatory Assets Currently Earning a Return
		Storm Related Costs			38,659		38,499	2 years		965		-	2 years
		Unamortized Loss on Reacquired Debt			12,538		8,277	21 years		10,768		12,422	32 years
		Red Rock Generating Facility			10,180		10,406	45 years		-		-
		Acquisition of Valley Electric Membership
			Corporation (VEMCO)		-		-			8,789		6,500	4 years
	Regulatory Assets Currently Not Earning a Return
		Pension and OPEB Funded Status			178,295		166,333	13 years		176,587		163,870	13 years
		Vegetation Management			11,196		13,303	1 year		-		-
		Deferral of Major Generation Overhauls			6,133		4,083	6 years		-		-
		Energy Efficiency/Peak Demand Reduction			4,394		3,705	1 year		1,284		495	1 year
		Income Taxes, Net			2,923		691	33 years		178,826		132,118	28 years
		Unrealized Loss on Forward Commitments			1,706		285	2 years		4,684		2,975	2 years
		Rate Case Expense			216		-	2 years		3,602		4,606	2 years
		Storm Related Costs			-		-			2,556		4,800	2 years
		Dolet Hills Deferred Fuel			-		-			1,886		2,725	3 years
		Other Regulatory Assets Being Recovered			305		133	various		250		335	various
Total Regulatory Assets Being Recovered					266,545		245,715			390,197		330,846
Total Noncurrent Regulatory Assets				$	266,545	$	263,545		$	394,276	$	332,698

				PSO					SWEPCo
								Remaining					Remaining
				December 31,				Refund	December 31,				Refund
				2011		2010		Period	2011		2010		Period
Regulatory Liabilities:				(in thousands)					(in thousands)
Current Regulatory Liabilities
Over-recovered Fuel Costs - pays a return				$	-	$	-		$	5,032	$	16,432	1 year
Noncurrent Regulatory Liabilities and
Deferred Investment Tax Credits
Regulatory liabilities not yet being paid:
	Regulatory Liabilities Currently Paying a Return
		Refundable Construction Financing Costs		$	-	$	-		$	52,594	$	20,139
	Regulatory Liabilities Currently Not Paying a Return
		Over-recovery of Costs Related to gridSMART®			4,232		3,806			-		-
		Storm Related Costs			2,248		3,493			-		-
		Other Regulatory Liabilities Not Yet Being Paid			-		-			806		806
Total Regulatory Liabilities Not Yet Being Paid					6,480		7,299			53,400		20,945
Regulatory liabilities being paid:
	Regulatory Liabilities Currently Paying a Return
		Asset Removal Costs			280,491		284,230	(a)		353,067		346,402	(a)
		Excess Earnings			-		-			3,047		3,119	42 years
		Other Regulatory Liabilities Being Paid			-		-			1,305		1,667	various
	Regulatory Liabilities Currently Not Paying a Return
		Deferred Investment Tax Credits			40,310		41,166	37 years		13,318		13,868	27 years
		Energy Efficiency/Peak Demand Reduction			6,444		4,266	1 year		-		-
		Vegetation Management			-		-			3,158		5,672	1 year
		Other Regulatory Liabilities Being Paid			1,087		-	various		1,276		2,000	various
Total Regulatory Liabilities Being Paid					328,332		329,662			375,171		372,728
Total Noncurrent Regulatory Liabilities and
	Deferred Investment Tax Credits			$	334,812	$	336,961		$	428,571	$	393,673
(a)			Relieved as removal costs are incurred.