Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

Components of Net Periodic Benefit Cost

					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended June 30,				Three Months Ended June 30,
	2012		2011		2012		2011
	(in millions)
Service Cost	$	19	$	18	$	11	$	10
Interest Cost		55		60		26		27
Expected Return on Plan Assets		(79)		(78)		(25)		(27)
Amortization of Prior Service Credit		-		-		(4)		-
Amortization of Net Actuarial Loss		38		31		15		8
Net Periodic Benefit Cost	$	33	$	31	$	23	$	18

					Other Postretirement
	Pension Plans				Benefit Plans
	Six Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in millions)
Service Cost	$	38	$	36	$	23	$	21
Interest Cost		111		119		52		54
Expected Return on Plan Assets		(159)		(157)		(50)		(54)
Amortization of Prior Service Credit		-		-		(9)		-
Amortization of Net Actuarial Loss		75		61		29		15
Net Periodic Benefit Cost	$	65	$	59	$	45	$	36

Appalachian Power Co [Member]

Components of Net Periodic Benefit Cost

APCo					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended June 30,				Three Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	1,891	$	1,800	$	1,347	$	1,246
Interest Cost		7,553		8,076		4,615		4,867
Expected Return on Plan Assets		(10,486)		(10,458)		(4,188)		(4,496)
Amortization of Transition Obligation		-		-		200		287
Amortization of Prior Service Cost (Credit)		119		229		(715)		(43)
Amortization of Net Actuarial Loss		5,084		4,144		2,632		1,459
Net Periodic Benefit Cost	$	4,161	$	3,791	$	3,891	$	3,320

					Other Postretirement
	Pension Plans				Benefit Plans
	Six Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	3,782	$	3,600	$	2,694	$	2,492
Interest Cost		15,106		16,146		9,231		9,734
Expected Return on Plan Assets		(20,972)		(20,916)		(8,376)		(8,992)
Amortization of Transition Obligation		-		-		400		573
Amortization of Prior Service Cost (Credit)		238		458		(1,431)		(86)
Amortization of Net Actuarial Loss		10,169		8,285		5,263		2,914
Net Periodic Benefit Cost	$	8,323	$	7,573	$	7,781	$	6,635

Indiana Michigan Power Co [Member]

Components of Net Periodic Benefit Cost

I&M					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended June 30,				Three Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	2,477	$	2,365	$	1,655	$	1,529
Interest Cost		6,561		6,934		3,197		3,402
Expected Return on Plan Assets		(9,392)		(9,214)		(3,212)		(3,471)
Amortization of Transition Obligation		-		-		33		47
Amortization of Prior Service Cost (Credit)		102		186		(596)		(59)
Amortization of Net Actuarial Loss		4,393		3,538		1,763		892
Net Periodic Benefit Cost	$	4,141	$	3,809	$	2,840	$	2,340

					Other Postretirement
	Pension Plans				Benefit Plans
	Six Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	4,954	$	4,723	$	3,310	$	3,059
Interest Cost		13,122		13,863		6,393		6,805
Expected Return on Plan Assets		(18,783)		(18,428)		(6,423)		(6,943)
Amortization of Transition Obligation		-		-		66		94
Amortization of Prior Service Cost (Credit)		204		372		(1,192)		(118)
Amortization of Net Actuarial Loss		8,785		7,072		3,525		1,783
Net Periodic Benefit Cost	$	8,282	$	7,602	$	5,679	$	4,680

Ohio Power Co [Member]

Components of Net Periodic Benefit Cost

OPCo					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended June 30,				Three Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	2,751	$	2,558	$	2,187	$	1,956
Interest Cost		11,299		12,098		6,048		6,373
Expected Return on Plan Assets		(17,101)		(16,367)		(5,639)		(6,127)
Amortization of Transition Obligation		-		-		26		38
Amortization of Prior Service Cost (Credit)		185		368		(968)		(54)
Amortization of Net Actuarial Loss		7,610		6,214		3,417		1,845
Net Periodic Benefit Cost	$	4,744	$	4,871	$	5,071	$	4,031

					Other Postretirement
	Pension Plans				Benefit Plans
	Six Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	5,502	$	5,115	$	4,374	$	3,913
Interest Cost		22,597		24,176		12,095		12,748
Expected Return on Plan Assets		(34,201)		(32,733)		(11,278)		(12,256)
Amortization of Transition Obligation		-		-		52		75
Amortization of Prior Service Cost (Credit)		371		736		(1,936)		(107)
Amortization of Net Actuarial Loss		15,220		12,414		6,834		3,649
Net Periodic Benefit Cost	$	9,489	$	9,708	$	10,141	$	8,022

Public Service Co Of Oklahoma [Member]

Components of Net Periodic Benefit Cost

PSO					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended June 30,				Three Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	1,488	$	1,442	$	709	$	656
Interest Cost		3,075		3,338		1,450		1,511
Expected Return on Plan Assets		(4,504)		(4,366)		(1,481)		(1,566)
Amortization of Prior Service Credit		(237)		(239)		(269)		(19)
Amortization of Net Actuarial Loss		2,051		1,700		797		388
Net Periodic Benefit Cost	$	1,873	$	1,875	$	1,206	$	970

					Other Postretirement
	Pension Plans				Benefit Plans
	Six Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	2,976	$	2,880	$	1,418	$	1,311
Interest Cost		6,150		6,643		2,899		3,023
Expected Return on Plan Assets		(9,008)		(8,732)		(2,961)		(3,132)
Amortization of Prior Service Credit		(474)		(475)		(539)		(38)
Amortization of Net Actuarial Loss		4,103		3,378		1,594		776
Net Periodic Benefit Cost	$	3,747	$	3,694	$	2,411	$	1,940

Southwestern Electric Power Co [Member]

Components of Net Periodic Benefit Cost

SWEPCo					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended June 30,				Three Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	1,774	$	1,644	$	831	$	757
Interest Cost		3,135		3,348		1,668		1,743
Expected Return on Plan Assets		(4,716)		(4,595)		(1,698)		(1,800)
Amortization of Prior Service Cost (Credit)		(199)		(200)		(233)		64
Amortization of Net Actuarial Loss		2,082		1,700		914		446
Net Periodic Benefit Cost	$	2,076	$	1,897	$	1,482	$	1,210

					Other Postretirement
	Pension Plans				Benefit Plans
	Six Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
	(in thousands)
Service Cost	$	3,549	$	3,286	$	1,662	$	1,514
Interest Cost		6,269		6,666		3,336		3,485
Expected Return on Plan Assets		(9,433)		(9,190)		(3,397)		(3,600)
Amortization of Prior Service Cost (Credit)		(397)		(398)		(466)		129
Amortization of Net Actuarial Loss		4,165		3,380		1,829		892
Net Periodic Benefit Cost	$	4,153	$	3,744	$	2,964	$	2,420