Rate Matters (Tables)

6 Months Ended

Jun. 30, 2016

Regulatory Assets Pending Final Regulatory Approval

	AEP
	June 30,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Plant Retirement Costs - Unrecovered Plant	$	161.9	$	—
Storm Related Costs	24.5		24.2
Plant Retirement Costs - Materials and Supplies	20.8		20.9
Other Regulatory Assets Pending Final Regulatory Approval	1.1		—
Regulatory Assets Currently Not Earning a Return
Plant Retirement Costs - Asset Retirement Obligation Costs	56.7		59.8
Storm Related Costs	24.3		18.2
Peak Demand Reduction/Energy Efficiency	0.6		13.1
Cook Plant Turbine	11.2		9.7
Other Regulatory Assets Pending Final Regulatory Approval	29.9		22.0
Total Regulatory Assets Pending Final Regulatory Approval	$	331.0	$	167.9

Appalachian Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	APCo
	June 30,		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	29.6		32.7
Peak Demand Reduction/Energy Efficiency - Virginia	—		12.7
Amos Plant Transfer Costs - West Virginia	—		2.0
Other Regulatory Assets Pending Final Regulatory Approval	0.6		0.6
Total Regulatory Assets Pending Final Regulatory Approval	$	39.4	$	57.3

Indiana Michigan Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	I&M
	June 30,		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	11.2		9.7
Deferred Cook Plant Life Cycle Management Project Costs - Michigan	6.2		4.2
Rockport Dry Sorbent Injection System - Indiana	4.5		2.8
Stranded Costs on Retired Plant	3.9		3.9
Other Regulatory Assets Pending Final Regulatory Approval	0.4		—
Total Regulatory Assets Pending Final Regulatory Approval	$	64.9	$	59.3

Ohio Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	OPCo
	June 30,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Not Earning a Return
gridSMART® Costs	$	3.0	$	1.3
OVEC Purchased Power	2.5		—
Total Regulatory Assets Pending Final Regulatory Approval	$	5.5	$	1.3

Public Service Co Of Oklahoma [Member]

Regulatory Assets Pending Final Regulatory Approval

	PSO
	June 30,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Plant Retirement Costs - Unrecovered Plant	$	86.5	$	—
Plant Retirement Costs - Asset Retirement Obligation Costs	0.5		—
Regulatory Assets Currently Not Earning a Return
Storm Related Costs	18.0		12.3
Other Regulatory Assets Pending Final Regulatory Approval	1.4		1.1
Total Regulatory Assets Pending Final Regulatory Approval	$	106.4	$	13.4

Southwestern Electric Power Co [Member]

Regulatory Assets Pending Final Regulatory Approval

	SWEPCo
	June 30,		December 31,
	2016		2015
Noncurrent Regulatory Assets	(in millions)
Regulatory Assets Currently Earning a Return
Plant Retirement Costs - Unrecovered Plant	$	75.4	$	—
Plant Retirement Costs - Asset Retirement Obligation Costs	0.5		—
Regulatory Assets Currently Not Earning a Return
Shipe Road Transmission Project - FERC	3.1		3.1
Asset Retirement Obligation - Arkansas, Louisiana	2.2		1.7
Other Regulatory Assets Pending Final Regulatory Approval	1.6		1.1
Total Regulatory Assets Pending Final Regulatory Approval	$	82.8	$	5.9