Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2012

Components of Net Periodic Benefit Cost

					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended September 30,				Three Months Ended September 30,
	2012		2011		2012		2011
	(in millions)
Service Cost	$	19	$	18	$	12	$	11
Interest Cost		56		59		26		27
Expected Return on Plan Assets		(80)		(79)		(26)		(27)
Amortization of Transition Obligation		-		-		1		1
Amortization of Prior Service Cost (Credit)		-		1		(5)		(1)
Amortization of Net Actuarial Loss		42		31		14		8
Net Periodic Benefit Cost	$	37	$	30	$	22	$	19

					Other Postretirement
	Pension Plans				Benefit Plans
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(in millions)
Service Cost	$	57	$	54	$	35	$	32
Interest Cost		167		178		78		81
Expected Return on Plan Assets		(239)		(236)		(76)		(81)
Amortization of Transition Obligation		-		-		1		1
Amortization of Prior Service Cost (Credit)		-		1		(14)		(1)
Amortization of Net Actuarial Loss		117		92		43		23
Net Periodic Benefit Cost	$	102	$	89	$	67	$	55

Appalachian Power Co [Member]

Components of Net Periodic Benefit Cost

APCo					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended September 30,				Three Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	1,892	$	1,799	$	1,346	$	1,245
Interest Cost		7,553		8,073		4,616		4,867
Expected Return on Plan Assets		(10,486)		(10,458)		(4,188)		(4,496)
Amortization of Transition Obligation		-		-		201		286
Amortization of Prior Service Cost (Credit)		118		230		(716)		(42)
Amortization of Net Actuarial Loss		5,085		4,142		2,631		1,465
Net Periodic Benefit Cost	$	4,162	$	3,786	$	3,890	$	3,325

					Other Postretirement
	Pension Plans				Benefit Plans
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	5,674	$	5,399	$	4,040	$	3,737
Interest Cost		22,659		24,219		13,847		14,601
Expected Return on Plan Assets		(31,458)		(31,374)		(12,564)		(13,488)
Amortization of Transition Obligation		-		-		601		859
Amortization of Prior Service Cost (Credit)		356		688		(2,147)		(128)
Amortization of Net Actuarial Loss		15,254		12,427		7,894		4,379
Net Periodic Benefit Cost	$	12,485	$	11,359	$	11,671	$	9,960

Indiana Michigan Power Co [Member]

Components of Net Periodic Benefit Cost

I&M					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended September 30,				Three Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	2,477	$	2,362	$	1,655	$	1,531
Interest Cost		6,562		6,931		3,196		3,402
Expected Return on Plan Assets		(9,392)		(9,213)		(3,212)		(3,471)
Amortization of Transition Obligation		-		-		33		47
Amortization of Prior Service Cost (Credit)		101		186		(595)		(59)
Amortization of Net Actuarial Loss		4,392		3,536		1,762		891
Net Periodic Benefit Cost	$	4,140	$	3,802	$	2,839	$	2,341

					Other Postretirement
	Pension Plans				Benefit Plans
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	7,431	$	7,085	$	4,965	$	4,590
Interest Cost		19,684		20,794		9,589		10,207
Expected Return on Plan Assets		(28,175)		(27,641)		(9,635)		(10,414)
Amortization of Transition Obligation		-		-		99		141
Amortization of Prior Service Cost (Credit)		305		558		(1,787)		(177)
Amortization of Net Actuarial Loss		13,177		10,608		5,287		2,674
Net Periodic Benefit Cost	$	12,422	$	11,404	$	8,518	$	7,021

Ohio Power Co [Member]

Components of Net Periodic Benefit Cost

OPCo					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended September 30,				Three Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	2,751	$	2,557	$	2,187	$	1,957
Interest Cost		11,298		12,087		6,047		6,375
Expected Return on Plan Assets		(17,100)		(16,364)		(5,639)		(6,129)
Amortization of Transition Obligation		-		-		26		37
Amortization of Prior Service Cost (Credit)		186		368		(969)		(53)
Amortization of Net Actuarial Loss		7,610		6,207		3,418		2,265
Net Periodic Benefit Cost	$	4,745	$	4,855	$	5,070	$	4,452

					Other Postretirement
	Pension Plans				Benefit Plans
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	8,253	$	7,672	$	6,561	$	5,870
Interest Cost		33,895		36,263		18,142		19,123
Expected Return on Plan Assets		(51,301)		(49,097)		(16,917)		(18,385)
Amortization of Transition Obligation		-		-		78		112
Amortization of Prior Service Cost (Credit)		557		1,104		(2,905)		(160)
Amortization of Net Actuarial Loss		22,830		18,621		10,252		5,914
Net Periodic Benefit Cost	$	14,234	$	14,563	$	15,211	$	12,474

Public Service Co Of Oklahoma [Member]

Components of Net Periodic Benefit Cost

PSO					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended September 30,				Three Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	1,487	$	1,440	$	709	$	655
Interest Cost		3,076		3,321		1,449		1,512
Expected Return on Plan Assets		(4,503)		(4,366)		(1,480)		(1,566)
Amortization of Prior Service Credit		(237)		(238)		(270)		(19)
Amortization of Net Actuarial Loss		2,051		1,690		797		389
Net Periodic Benefit Cost	$	1,874	$	1,847	$	1,205	$	971

					Other Postretirement
	Pension Plans				Benefit Plans
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	4,463	$	4,320	$	2,127	$	1,966
Interest Cost		9,226		9,964		4,348		4,535
Expected Return on Plan Assets		(13,511)		(13,098)		(4,441)		(4,698)
Amortization of Prior Service Credit		(711)		(713)		(809)		(57)
Amortization of Net Actuarial Loss		6,154		5,068		2,391		1,165
Net Periodic Benefit Cost	$	5,621	$	5,541	$	3,616	$	2,911

Southwestern Electric Power Co [Member]

Components of Net Periodic Benefit Cost

SWEPCo					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended September 30,				Three Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	1,775	$	1,644	$	831	$	757
Interest Cost		3,134		3,333		1,669		1,742
Expected Return on Plan Assets		(4,717)		(4,596)		(1,699)		(1,800)
Amortization of Prior Service Cost (Credit)		(198)		(199)		(234)		64
Amortization of Net Actuarial Loss		2,083		1,690		915		447
Net Periodic Benefit Cost	$	2,077	$	1,872	$	1,482	$	1,210

					Other Postretirement
	Pension Plans				Benefit Plans
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	5,324	$	4,930	$	2,493	$	2,271
Interest Cost		9,403		9,999		5,005		5,227
Expected Return on Plan Assets		(14,150)		(13,786)		(5,096)		(5,400)
Amortization of Prior Service Cost (Credit)		(595)		(597)		(700)		193
Amortization of Net Actuarial Loss		6,248		5,070		2,744		1,339
Net Periodic Benefit Cost	$	6,230	$	5,616	$	4,446	$	3,630