Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Components of Net Periodic Benefit Cost

					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended March 31,				Three Months Ended March 31,
	2013		2012		2013		2012
	(in millions)
Service Cost	$	17	$	19	$	6	$	12
Interest Cost		50		56		18		26
Expected Return on Plan Assets		(69)		(80)		(27)		(25)
Amortization of Prior Service Cost (Credit)		1		-		(17)		(5)
Amortization of Net Actuarial Loss		46		37		16		14
Net Periodic Benefit Cost (Credit)	$	45	$	32	$	(4)	$	22

Appalachian Power Co [Member]

Components of Net Periodic Benefit Cost

APCo
					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended March 31,				Three Months Ended March 31,
	2013		2012		2013		2012
	(in thousands)
Service Cost	$	1,543	$	1,891	$	641	$	1,347
Interest Cost		6,916		7,553		3,363		4,616
Expected Return on Plan Assets		(9,260)		(10,486)		(4,536)		(4,188)
Amortization of Transition Obligation		-		-		-		200
Amortization of Prior Service Cost (Credit)		49		119		(2,512)		(716)
Amortization of Net Actuarial Loss		6,256		5,085		3,062		2,631
Net Periodic Benefit Cost	$	5,504	$	4,162	$	18	$	3,890

Indiana Michigan Power Co [Member]

Components of Net Periodic Benefit Cost

I&M
					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended March 31,				Three Months Ended March 31,
	2013		2012		2013		2012
	(in thousands)
Service Cost	$	2,184	$	2,477	$	805	$	1,655
Interest Cost		6,025		6,561		2,055		3,196
Expected Return on Plan Assets		(8,207)		(9,391)		(3,296)		(3,211)
Amortization of Transition Obligation		-		-		-		33
Amortization of Prior Service Cost (Credit)		49		102		(2,355)		(596)
Amortization of Net Actuarial Loss		5,422		4,392		1,882		1,762
Net Periodic Benefit Cost (Credit)	$	5,473	$	4,141	$	(909)	$	2,839

Ohio Power Co [Member]

Components of Net Periodic Benefit Cost

OPCo
					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended March 31,				Three Months Ended March 31,
	2013		2012		2013		2012
	(in thousands)
Service Cost	$	2,372	$	2,751	$	1,300	$	2,187
Interest Cost		10,292		11,298		4,447		6,047
Expected Return on Plan Assets		(15,141)		(17,100)		(6,238)		(5,639)
Amortization of Transition Obligation		-		-		-		26
Amortization of Prior Service Cost (Credit)		71		186		(3,231)		(968)
Amortization of Net Actuarial Loss		9,309		7,610		4,041		3,417
Net Periodic Benefit Cost	$	6,903	$	4,745	$	319	$	5,070

Public Service Co Of Oklahoma [Member]

Components of Net Periodic Benefit Cost

PSO
					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended March 31,				Three Months Ended March 31,
	2013		2012		2013		2012
	(in thousands)
Service Cost	$	1,391	$	1,488	$	343	$	709
Interest Cost		2,748		3,075		948		1,449
Expected Return on Plan Assets		(3,918)		(4,504)		(1,522)		(1,480)
Amortization of Prior Service Cost (Credit)		74		(237)		(1,072)		(270)
Amortization of Net Actuarial Loss		2,461		2,052		869		797
Net Periodic Benefit Cost (Credit)	$	2,756	$	1,874	$	(434)	$	1,205

Southwestern Electric Power Co [Member]

Components of Net Periodic Benefit Cost

SWEPCo
					Other Postretirement
	Pension Plans				Benefit Plans
	Three Months Ended March 31,				Three Months Ended March 31,
	2013		2012		2013		2012
	(in thousands)
Service Cost	$	1,753	$	1,775	$	423	$	831
Interest Cost		2,864		3,134		1,075		1,668
Expected Return on Plan Assets		(4,127)		(4,717)		(1,720)		(1,699)
Amortization of Prior Service Cost (Credit)		87		(198)		(1,288)		(233)
Amortization of Net Actuarial Loss		2,553		2,083		982		915
Net Periodic Benefit Cost (Credit)	$	3,130	$	2,077	$	(528)	$	1,482