Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2014

Components of Net Periodic Benefit Cost

	Pension Plans						Other Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in millions)
Service Cost	$	18		$	18		$	3		$	6
Interest Cost	56			51			17			17
Expected Return on Plan Assets	(65		)	(70		)	(28		)	(26		)
Amortization of Prior Service Credit	—			—			(17		)	(18		)
Amortization of Net Actuarial Loss	31			46			6			16
Net Periodic Benefit Cost (Credit)	$	40		$	45		$	(19	)	$	(5	)

	Pension Plans						Other Postretirement Benefit Plans
	Six Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in millions)
Service Cost	$	36		$	35		$	7		$	12
Interest Cost	111			101			34			35
Expected Return on Plan Assets	(131		)	(139		)	(56		)	(53		)
Amortization of Prior Service Cost (Credit)	1			1			(34		)	(35		)
Amortization of Net Actuarial Loss	62			92			11			32
Net Periodic Benefit Cost (Credit)	$	79		$	90		$	(38	)	$	(9	)

Appalachian Power Co [Member]

Components of Net Periodic Benefit Cost

APCo

	Pension Plans						Other Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	1,759		$	1,542		$	362		$	642
Interest Cost	7,406			6,915			3,197			3,364
Expected Return on Plan Assets	(8,481		)	(9,260		)	(4,633		)	(4,537		)
Amortization of Prior Service Cost (Credit)	49			50			(2,512		)	(2,513		)
Amortization of Net Actuarial Loss	4,148			6,257			1,145			3,062
Net Periodic Benefit Cost (Credit)	$	4,881		$	5,504		$	(2,441	)	$	18

	Pension Plans						Other Postretirement Benefit Plans
	Six Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	3,518		$	3,085		$	724		$	1,283
Interest Cost	14,812			13,831			6,394			6,727
Expected Return on Plan Assets	(16,963		)	(18,520		)	(9,266		)	(9,073		)
Amortization of Prior Service Cost (Credit)	99			99			(5,025		)	(5,025		)
Amortization of Net Actuarial Loss	8,296			12,513			2,291			6,124
Net Periodic Benefit Cost (Credit)	$	9,762		$	11,008		$	(4,882	)	$	36

Indiana Michigan Power Co [Member]

Components of Net Periodic Benefit Cost

I&M

	Pension Plans						Other Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	2,517		$	2,184		$	487		$	805
Interest Cost	6,574			6,025			1,910			2,055
Expected Return on Plan Assets	(7,748		)	(8,206		)	(3,363		)	(3,296		)
Amortization of Prior Service Cost (Credit)	48			48			(2,356		)	(2,355		)
Amortization of Net Actuarial Loss	3,646			5,422			592			1,881
Net Periodic Benefit Cost (Credit)	$	5,037		$	5,473		$	(2,730	)	$	(910	)

	Pension Plans						Other Postretirement Benefit Plans
	Six Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	5,034		$	4,368		$	974		$	1,610
Interest Cost	13,147			12,050			3,819			4,110
Expected Return on Plan Assets	(15,496		)	(16,413		)	(6,727		)	(6,592		)
Amortization of Prior Service Cost (Credit)	97			97			(4,711		)	(4,710		)
Amortization of Net Actuarial Loss	7,292			10,844			1,184			3,763
Net Periodic Benefit Cost (Credit)	$	10,074		$	10,946		$	(5,461	)	$	(1,819	)

Ohio Power Co [Member]

Components of Net Periodic Benefit Cost

OPCo

	Pension Plans						Other Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	1,285		$	2,373		$	257		$	1,299
Interest Cost	5,526			10,292			1,900			4,447
Expected Return on Plan Assets	(6,606		)	(15,142		)	(3,380		)	(6,239		)
Amortization of Prior Service Cost (Credit)	39			70			(1,730		)	(3,230		)
Amortization of Net Actuarial Loss	3,105			9,309			595			4,041
Net Periodic Benefit Cost (Credit)	$	3,349		$	6,902		$	(2,358	)	$	318

	Pension Plans						Other Postretirement Benefit Plans
	Six Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	2,570		$	4,745		$	513		$	2,599
Interest Cost	11,052			20,584			3,801			8,894
Expected Return on Plan Assets	(13,213		)	(30,283		)	(6,760		)	(12,477		)
Amortization of Prior Service Cost (Credit)	78			141			(3,461		)	(6,461		)
Amortization of Net Actuarial Loss	6,211			18,618			1,190			8,082
Net Periodic Benefit Cost (Credit)	$	6,698		$	13,805		$	(4,717	)	$	637

Public Service Co Of Oklahoma [Member]

Components of Net Periodic Benefit Cost

PSO

	Pension Plans						Other Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	1,302		$	1,390		$	210		$	343
Interest Cost	3,014			2,749			894			948
Expected Return on Plan Assets	(3,651		)	(3,919		)	(1,575		)	(1,522		)
Amortization of Prior Service Cost (Credit)	74			74			(1,073		)	(1,073		)
Amortization of Net Actuarial Loss	1,688			2,461			277			869
Net Periodic Benefit Cost (Credit)	$	2,427		$	2,755		$	(1,267	)	$	(435	)

	Pension Plans						Other Postretirement Benefit Plans
	Six Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	2,604		$	2,781		$	420		$	686
Interest Cost	6,028			5,497			1,787			1,896
Expected Return on Plan Assets	(7,302		)	(7,837		)	(3,150		)	(3,044		)
Amortization of Prior Service Cost (Credit)	148			148			(2,145		)	(2,145		)
Amortization of Net Actuarial Loss	3,376			4,922			554			1,738
Net Periodic Benefit Cost (Credit)	$	4,854		$	5,511		$	(2,534	)	$	(869	)

Southwestern Electric Power Co [Member]

Components of Net Periodic Benefit Cost

SWEPCo

	Pension Plans						Other Postretirement Benefit Plans
	Three Months Ended						Three Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	1,654		$	1,753		$	253		$	423
Interest Cost	3,162			2,863			998			1,076
Expected Return on Plan Assets	(3,857		)	(4,128		)	(1,754		)	(1,720		)
Amortization of Prior Service Cost (Credit)	88			88			(1,289		)	(1,290		)
Amortization of Net Actuarial Loss	1,762			2,554			308			982
Net Periodic Benefit Cost (Credit)	$	2,809		$	3,130		$	(1,484	)	$	(529	)

	Pension Plans						Other Postretirement Benefit Plans
	Six Months Ended						Six Months Ended
	June 30,						June 30,
	2014			2013			2014			2013
	(in thousands)
Service Cost	$	3,309		$	3,506		$	506		$	846
Interest Cost	6,325			5,727			1,996			2,151
Expected Return on Plan Assets	(7,714		)	(8,255		)	(3,508		)	(3,440		)
Amortization of Prior Service Cost (Credit)	175			175			(2,578		)	(2,578		)
Amortization of Net Actuarial Loss	3,523			5,107			617			1,964
Net Periodic Benefit Cost (Credit)	$	5,618		$	6,260		$	(2,967	)	$	(1,057	)