Commitments, Guarantees and Contingencies (Tables)

6 Months Ended

Jun. 30, 2017

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in millions)
AEP	$	138.7	September 2017 - June 2018
OPCo	0.6		September 2017

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in millions)
AEP	$	38.0
APCo	5.6
I&M	3.2
OPCo	5.9
PSO	3.2
SWEPCo	3.6

Appalachian Power Co [Member]

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in millions)
AEP	$	38.0
APCo	5.6
I&M	3.2
OPCo	5.9
PSO	3.2
SWEPCo	3.6

Indiana Michigan Power Co [Member]

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in millions)
AEP	$	38.0
APCo	5.6
I&M	3.2
OPCo	5.9
PSO	3.2
SWEPCo	3.6

Ohio Power Co [Member]

Maximum Future Payments for Letters of Credit Uncommitted Facilities

Company	Amount		Maturity
	(in millions)
AEP	$	138.7	September 2017 - June 2018
OPCo	0.6		September 2017

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in millions)
AEP	$	38.0
APCo	5.6
I&M	3.2
OPCo	5.9
PSO	3.2
SWEPCo	3.6

Public Service Co Of Oklahoma [Member]

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in millions)
AEP	$	38.0
APCo	5.6
I&M	3.2
OPCo	5.9
PSO	3.2
SWEPCo	3.6

Southwestern Electric Power Co [Member]

Maximum Potential Loss on Master Lease Agreements

Company	Maximum Potential Loss
	(in millions)
AEP	$	38.0
APCo	5.6
I&M	3.2
OPCo	5.9
PSO	3.2
SWEPCo	3.6