Commitments, Guarantees and Contingencies (Tables)

9 Months Ended

Sep. 30, 2015

Appalachian Power Co [Member]

Maximum Future Payments of Letters of Credit

Company	Amount		Maturity
	(in thousands)
I&M	$	35	March 2016

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in thousands)
OPCo	$	4,200	September 2016

Pollution Control Bonds Supported by Bilateral Letters of Credit

Company	Pollution Control Bonds		Bilateral Letters of Credit		Maturity of Bilateral Letters of Credit
	(in thousands)
APCo	$	229,650	$	232,293	March 2016 to March 2017
I&M	77,000		77,886		March 2017

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in thousands)
APCo	$	5,396
I&M	3,448
OPCo	6,075
PSO	2,785
SWEPCo	3,086

Indiana Michigan Power Co [Member]

Maximum Future Payments of Letters of Credit

Company	Amount		Maturity
	(in thousands)
I&M	$	35	March 2016

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in thousands)
OPCo	$	4,200	September 2016

Pollution Control Bonds Supported by Bilateral Letters of Credit

Company	Pollution Control Bonds		Bilateral Letters of Credit		Maturity of Bilateral Letters of Credit
	(in thousands)
APCo	$	229,650	$	232,293	March 2016 to March 2017
I&M	77,000		77,886		March 2017

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in thousands)
APCo	$	5,396
I&M	3,448
OPCo	6,075
PSO	2,785
SWEPCo	3,086

Ohio Power Co [Member]

Maximum Future Payments of Letters of Credit

Company	Amount		Maturity
	(in thousands)
I&M	$	35	March 2016

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in thousands)
OPCo	$	4,200	September 2016

Pollution Control Bonds Supported by Bilateral Letters of Credit

Company	Pollution Control Bonds		Bilateral Letters of Credit		Maturity of Bilateral Letters of Credit
	(in thousands)
APCo	$	229,650	$	232,293	March 2016 to March 2017
I&M	77,000		77,886		March 2017

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in thousands)
APCo	$	5,396
I&M	3,448
OPCo	6,075
PSO	2,785
SWEPCo	3,086

Public Service Co Of Oklahoma [Member]

Maximum Future Payments of Letters of Credit

Company	Amount		Maturity
	(in thousands)
I&M	$	35	March 2016

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in thousands)
OPCo	$	4,200	September 2016

Pollution Control Bonds Supported by Bilateral Letters of Credit

Company	Pollution Control Bonds		Bilateral Letters of Credit		Maturity of Bilateral Letters of Credit
	(in thousands)
APCo	$	229,650	$	232,293	March 2016 to March 2017
I&M	77,000		77,886		March 2017

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in thousands)
APCo	$	5,396
I&M	3,448
OPCo	6,075
PSO	2,785
SWEPCo	3,086

Southwestern Electric Power Co [Member]

Maximum Future Payments of Letters of Credit

Company	Amount		Maturity
	(in thousands)
I&M	$	35	March 2016

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in thousands)
OPCo	$	4,200	September 2016

Pollution Control Bonds Supported by Bilateral Letters of Credit

Company	Pollution Control Bonds		Bilateral Letters of Credit		Maturity of Bilateral Letters of Credit
	(in thousands)
APCo	$	229,650	$	232,293	March 2016 to March 2017
I&M	77,000		77,886		March 2017

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in thousands)
APCo	$	5,396
I&M	3,448
OPCo	6,075
PSO	2,785
SWEPCo	3,086