Rate Matters (Tables)

3 Months Ended

Mar. 31, 2016

Regulatory Assets Pending Final Regulatory Approval

	AEP
	March 31,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Storm Related Costs	$	24.8	$	24.2
Plant Retirement Costs - Materials and Supplies	20.8		20.9
Regulatory Assets Currently Not Earning a Return
Plant Retirement Costs - Asset Retirement Obligation Costs	59.8		59.8
Storm Related Costs	23.2		18.2
Peak Demand Reduction/Energy Efficiency	14.1		13.1
Other Regulatory Assets Pending Final Regulatory Approval	35.4		31.7
Total Regulatory Assets Pending Final Regulatory Approval	$	178.1	$	167.9

Schedule of Potential Additional Customer Credits Related to the PPA Agreement

PJM Planning Year	Potential Credit
June 2020 through May 2021	$10 million
June 2021 through May 2022	$20 million
June 2022 through May 2023	$30 million
June 2023 through May 2024	$40 million

Appalachian Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	APCo
	March 31,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Plant Retirement Costs - Materials and Supplies	$	9.2	$	9.3
Regulatory Assets Currently Not Earning a Return
Plant Retirement Costs - Asset Retirement Obligation Costs	32.7		32.7
Peak Demand Reduction/Energy Efficiency - Virginia	13.6		12.7
Amos Plant Transfer Costs - West Virginia	2.0		2.0
Other Regulatory Assets Pending Final Regulatory Approval	0.6		0.6
Total Regulatory Assets Pending Final Regulatory Approval	$	58.1	$	57.3

Indiana Michigan Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	I&M
	March 31,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Plant Retirement Costs - Materials and Supplies	$	11.6	$	11.6
Regulatory Assets Currently Not Earning a Return
Plant Retirement Costs - Asset Retirement Obligation Costs - Indiana	27.1		27.1
Cook Plant Turbine	10.4		9.7
Deferred Cook Plant Life Cycle Management Project Costs -Michigan	5.4		4.2
Stranded Costs on Abandoned Plants	3.9		3.9
Rockport Dry Sorbent Injection System - Indiana	3.6		2.8
Other Regulatory Assets Pending Final Regulatory Approval	0.2		—
Total Regulatory Assets Pending Final Regulatory Approval	$	62.2	$	59.3

Ohio Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	OPCo
	March 31,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
gridSMART® Costs	$	1.8	$	1.3
Total Regulatory Assets Pending Final Regulatory Approval	$	1.8	$	1.3

Schedule of Potential Additional Customer Credits Related to the PPA Agreement

PJM Planning Year	Potential Credit
June 2020 through May 2021	$10 million
June 2021 through May 2022	$20 million
June 2022 through May 2023	$30 million
June 2023 through May 2024	$40 million

Public Service Co Of Oklahoma [Member]

Regulatory Assets Pending Final Regulatory Approval

	PSO
	March 31,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Storm Related Costs	$	17.0	$	12.3
Other Regulatory Assets Pending Final Regulatory Approval	1.1		1.1
Total Regulatory Assets Pending Final Regulatory Approval	$	18.1	$	13.4

Southwestern Electric Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	SWEPCo
	March 31,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
Shipe Road Transmission Project - FERC	$	3.1	$	3.1
Asset Retirement Obligation - Arkansas, Louisiana	1.9		1.7
Other Regulatory Assets Pending Final Regulatory Approval	1.4		1.1
Total Regulatory Assets Pending Final Regulatory Approval	$	6.4	$	5.9