Cost Reduction Program (Tables)

3 Months Ended

Mar. 31, 2015

Disposition Plant Severance [Member]

Remaining Accrual

	Disposition Plant Severance Activity
	(in millions)
Balance as of December 31, 2014	$	29
Incurred	—
Settled	(1		)
Adjustments	—
Balance as of March 31, 2015	$	28

Appalachian Power Co [Member]

Remaining Accrual

	Balance as of		Expense Allocation from			Incurred by Registrant									Remaining Balance as of
Company	December 31, 2014		AEPSC			Subsidiaries			Settled				Adjustments		March 31, 2015
	(in thousands)
APCo	$	9,304	$	(4	)	$	(187	)	$	(98	)	(a)	$	—	$	9,015
I&M	8,023		(2		)	90			(5		)		—		8,106
PSO	134		(2		)	—			(111		)		—		21
SWEPCo	84		(3		)	—			(80		)		—		1

(a) Settled includes amounts received from affiliates for expenses related to joint plant.

Total Cost Incurred

Company	Total Cost Incurred
	(in thousands)
APCo	$	7,112
I&M	8,185
OPCo	80
PSO	288
SWEPCo	289

Indiana Michigan Power Co [Member]

Remaining Accrual

	Balance as of		Expense Allocation from			Incurred by Registrant									Remaining Balance as of
Company	December 31, 2014		AEPSC			Subsidiaries			Settled				Adjustments		March 31, 2015
	(in thousands)
APCo	$	9,304	$	(4	)	$	(187	)	$	(98	)	(a)	$	—	$	9,015
I&M	8,023		(2		)	90			(5		)		—		8,106
PSO	134		(2		)	—			(111		)		—		21
SWEPCo	84		(3		)	—			(80		)		—		1

(a) Settled includes amounts received from affiliates for expenses related to joint plant.

Total Cost Incurred

Company	Total Cost Incurred
	(in thousands)
APCo	$	7,112
I&M	8,185
OPCo	80
PSO	288
SWEPCo	289

Ohio Power Co [Member]

Remaining Accrual

	Balance as of		Expense Allocation from			Incurred by Registrant									Remaining Balance as of
Company	December 31, 2014		AEPSC			Subsidiaries			Settled				Adjustments		March 31, 2015
	(in thousands)
APCo	$	9,304	$	(4	)	$	(187	)	$	(98	)	(a)	$	—	$	9,015
I&M	8,023		(2		)	90			(5		)		—		8,106
PSO	134		(2		)	—			(111		)		—		21
SWEPCo	84		(3		)	—			(80		)		—		1

(a) Settled includes amounts received from affiliates for expenses related to joint plant.

Total Cost Incurred

Company	Total Cost Incurred
	(in thousands)
APCo	$	7,112
I&M	8,185
OPCo	80
PSO	288
SWEPCo	289

Public Service Co Of Oklahoma [Member]

Remaining Accrual

	Balance as of		Expense Allocation from			Incurred by Registrant									Remaining Balance as of
Company	December 31, 2014		AEPSC			Subsidiaries			Settled				Adjustments		March 31, 2015
	(in thousands)
APCo	$	9,304	$	(4	)	$	(187	)	$	(98	)	(a)	$	—	$	9,015
I&M	8,023		(2		)	90			(5		)		—		8,106
PSO	134		(2		)	—			(111		)		—		21
SWEPCo	84		(3		)	—			(80		)		—		1

(a) Settled includes amounts received from affiliates for expenses related to joint plant.

Total Cost Incurred

Company	Total Cost Incurred
	(in thousands)
APCo	$	7,112
I&M	8,185
OPCo	80
PSO	288
SWEPCo	289

Southwestern Electric Power Co [Member]

Remaining Accrual

	Balance as of		Expense Allocation from			Incurred by Registrant									Remaining Balance as of
Company	December 31, 2014		AEPSC			Subsidiaries			Settled				Adjustments		March 31, 2015
	(in thousands)
APCo	$	9,304	$	(4	)	$	(187	)	$	(98	)	(a)	$	—	$	9,015
I&M	8,023		(2		)	90			(5		)		—		8,106
PSO	134		(2		)	—			(111		)		—		21
SWEPCo	84		(3		)	—			(80		)		—		1

(a) Settled includes amounts received from affiliates for expenses related to joint plant.

Total Cost Incurred

Company	Total Cost Incurred
	(in thousands)
APCo	$	7,112
I&M	8,185
OPCo	80
PSO	288
SWEPCo	289