Commitments, Guarantees and Contingencies (Tables)

3 Months Ended

Mar. 31, 2014

Appalachian Power Co [Member]

Pollution Control Bonds Supported by Bilateral Letters of Credit

			Bilateral		Maturity of
	Pollution		Letters		Bilateral Letters
Company	Control Bonds		of Credit		of Credit
	(in thousands)
APCo	$	229,650	$	232,293	March 2016 to March 2017
I&M		77,000		77,886	March 2015

Maximum Potential Loss on Master Lease Agreements

	Maximum
Company	Potential Loss
	(in thousands)
APCo	$	3,772
I&M		2,580
OPCo		4,384
PSO		1,347
SWEPCo		2,486

Indiana Michigan Power Co [Member]

Maximum Future Payments of Letters of Credit

Company	Amount		Maturity
	(in thousands)
I&M	$	150	March 2015
OPCo		3,081	June 2014

Pollution Control Bonds Supported by Bilateral Letters of Credit

			Bilateral		Maturity of
	Pollution		Letters		Bilateral Letters
Company	Control Bonds		of Credit		of Credit
	(in thousands)
APCo	$	229,650	$	232,293	March 2016 to March 2017
I&M		77,000		77,886	March 2015

Maximum Potential Loss on Master Lease Agreements

	Maximum
Company	Potential Loss
	(in thousands)
APCo	$	3,772
I&M		2,580
OPCo		4,384
PSO		1,347
SWEPCo		2,486

Ohio Power Co [Member]

Maximum Future Payments of Letters of Credit

Company	Amount		Maturity
	(in thousands)
I&M	$	150	March 2015
OPCo		3,081	June 2014

Maximum Potential Loss on Master Lease Agreements

	Maximum
Company	Potential Loss
	(in thousands)
APCo	$	3,772
I&M		2,580
OPCo		4,384
PSO		1,347
SWEPCo		2,486

Public Service Co Of Oklahoma [Member]

Maximum Potential Loss on Master Lease Agreements

	Maximum
Company	Potential Loss
	(in thousands)
APCo	$	3,772
I&M		2,580
OPCo		4,384
PSO		1,347
SWEPCo		2,486

Southwestern Electric Power Co [Member]

Maximum Potential Loss on Master Lease Agreements

	Maximum
Company	Potential Loss
	(in thousands)
APCo	$	3,772
I&M		2,580
OPCo		4,384
PSO		1,347
SWEPCo		2,486