Variable Interest Entities (Tables)

12 Months Ended

Dec. 31, 2014

Consolidated Assets And Liabilities Of Variable Interest Entities [Table Text Block]

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES
VARIABLE INTEREST ENTITIES
December 31, 2014
(in millions)
	SWEPCo Sabine		I&M DCC Fuel		AEP Credit		TCC Transition Funding			OPCo Ohio Phase-in- Recovery Funding			APCo Appalachian Consumer Rate Relief Funding			Protected Cell of EIS		Transource Energy
ASSETS
Current Assets	$	68	$	97	$	980	$	239		$	33		$	18		$	149	$	2
Net Property, Plant and Equipment	145		158		—		—			—			—			—		98
Other Noncurrent Assets	52		80		—		1,654		(a)	210		(b)	358		(c)	2		4
Total Assets	$	265	$	335	$	980	$	1,893		$	243		$	376		$	151	$	104
LIABILITIES AND EQUITY
Current Liabilities	$	36	$	86	$	894	$	322		$	47		$	27		$	44	$	21
Noncurrent Liabilities	228		249		—		1,553			195			347			62		55
Equity	1		—		86		18			1			2			45		28
Total Liabilities and Equity	$	265	$	335	$	980	$	1,893		$	243		$	376		$	151	$	104

(a) Includes an intercompany item eliminated in consolidation of $75 million.

(b) Includes an intercompany item eliminated in consolidation of $97 million.

(c) Includes an intercompany item eliminated in consolidation of $4 million.

AMERICAN ELECTRIC POWER COMPANY, INC. AND SUBSIDIARY COMPANIES
VARIABLE INTEREST ENTITIES
December 31, 2013
(in millions)
	SWEPCo Sabine		I&M DCC Fuel		AEP Credit		TCC Transition Funding			OPCo Ohio Phase-in- Recovery Funding			APCo Appalachian Consumer Rate Relief			Protected Cell of EIS
ASSETS
Current Assets	$	67	$	118	$	935	$	232		$	23		$	6		$	143
Net Property, Plant and Equipment	157		157		—		—			—			—			—
Other Noncurrent Assets	51		60		1		1,918		(a)	252		(b)	378		(c)	3
Total Assets	$	275	$	335	$	936	$	2,150		$	275		$	384		$	146
LIABILITIES AND EQUITY
Current Liabilities	$	33	$	108	$	827	$	312		$	37		$	14		$	39
Noncurrent Liabilities	242		227		1		1,820			237			368			66
Equity	—		—		108		18			1			2			41
Total Liabilities and Equity	$	275	$	335	$	936	$	2,150		$	275		$	384		$	146

(a) Includes an intercompany item eliminated in consolidation of $82 million.

(b) Includes an intercompany item eliminated in consolidation of $116 million.

(c) Includes an intercompany item eliminated in consolidation of $4 million.

PATH West Virginia Transmission Co, LLC [Member]

Companys Investment In Joint Venture

	December 31,
	2014				2013
	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in millions)
Capital Contribution from AEP	$	19	$	19	$	19	$	19
Retained Earnings	2		2		6		6
Total Investment in PATH-WV	$	21	$	21	$	25	$	25

Appalachian Power Co [Member] | Billings from AEP Service Corporation [Member]

Billings from Significant Variable Interest

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	216,470	$	174,393	$	195,176
I&M	133,194		119,343		127,232
OPCo	168,956		255,485		277,232
PSO	101,421		85,974		89,199
SWEPCo	140,286		125,441		136,642

Appalachian Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]

Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block]

	December 31,
	2014				2013
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
APCo	$	30,692	$	30,692	$	20,191	$	20,191
I&M	22,480		22,480		12,864		12,864
OPCo	24,695		24,695		31,425		31,425
PSO	15,338		15,338		10,596		10,596
SWEPCo	20,772		20,772		13,520		13,520

Appalachian Power Co [Member] | Appalachian Consumer Rate Relief Funding [Member]

Consolidated Assets And Liabilities Of Variable Interest Entities [Table Text Block]

APPALACHIAN POWER COMPANY AND SUBSIDIARIES
VARIABLE INTEREST ENTITIES
December 31, 2014 and 2013
(in thousands)
	Appalachian Consumer Rate Relief Funding
ASSETS	2014		2013
Current Assets	$	18,099	$	5,891
Other Noncurrent Assets (a)	358,264		378,029
Total Assets	$	376,363	$	383,920
LIABILITIES AND EQUITY
Current Liabilities	$	26,809	$	14,000
Noncurrent Liabilities	347,652		368,018
Equity	1,902		1,902
Total Liabilities and Equity	$	376,363	$	383,920

(a) Includes an intercompany item eliminated in consolidation as of December 31, 2014 and 2013 of $4 million and $4 million, respectively.

Indiana Michigan Power Co [Member] | Billings from AEP Generating Company [Member]

Billings from Significant Variable Interest

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
I&M	$	268,337	$	251,518	$	238,865
OPCo	—		148,459		203,582

Indiana Michigan Power Co [Member] | Billings from AEP Service Corporation [Member]

Billings from Significant Variable Interest

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	216,470	$	174,393	$	195,176
I&M	133,194		119,343		127,232
OPCo	168,956		255,485		277,232
PSO	101,421		85,974		89,199
SWEPCo	140,286		125,441		136,642

Indiana Michigan Power Co [Member] | Carrying Amount in AEP Generating Company's Accounts Payable [Member]

Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block]

	December 31,
	2014				2013
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
I&M	$	20,031	$	20,031	$	23,916	$	23,916
OPCo	—		—		12,810		12,810

Indiana Michigan Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]

Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block]

	December 31,
	2014				2013
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
APCo	$	30,692	$	30,692	$	20,191	$	20,191
I&M	22,480		22,480		12,864		12,864
OPCo	24,695		24,695		31,425		31,425
PSO	15,338		15,338		10,596		10,596
SWEPCo	20,772		20,772		13,520		13,520

Indiana Michigan Power Co [Member] | DCC Fuel [Member]

Consolidated Assets And Liabilities Of Variable Interest Entities [Table Text Block]

INDIANA MICHIGAN POWER COMPANY AND SUBSIDIARIES
VARIABLE INTEREST ENTITIES
December 31, 2014 and 2013
(in thousands)
	DCC Fuel
ASSETS	2014		2013
Current Assets	$	97,361	$	117,762
Net Property, Plant and Equipment	158,121		156,820
Other Noncurrent Assets	79,705		60,450
Total Assets	$	335,187	$	335,032
LIABILITIES AND EQUITY
Current Liabilities	$	86,026	$	107,815
Noncurrent Liabilities	249,161		227,217
Equity	—		—
Total Liabilities and Equity	$	335,187	$	335,032

Ohio Power Co [Member] | Billings from AEP Generating Company [Member]

Billings from Significant Variable Interest

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
I&M	$	268,337	$	251,518	$	238,865
OPCo	—		148,459		203,582

Ohio Power Co [Member] | Billings from AEP Service Corporation [Member]

Billings from Significant Variable Interest

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	216,470	$	174,393	$	195,176
I&M	133,194		119,343		127,232
OPCo	168,956		255,485		277,232
PSO	101,421		85,974		89,199
SWEPCo	140,286		125,441		136,642

Ohio Power Co [Member] | Carrying Amount in AEP Generating Company's Accounts Payable [Member]

Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block]

	December 31,
	2014				2013
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
I&M	$	20,031	$	20,031	$	23,916	$	23,916
OPCo	—		—		12,810		12,810

Ohio Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]

Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block]

	December 31,
	2014				2013
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
APCo	$	30,692	$	30,692	$	20,191	$	20,191
I&M	22,480		22,480		12,864		12,864
OPCo	24,695		24,695		31,425		31,425
PSO	15,338		15,338		10,596		10,596
SWEPCo	20,772		20,772		13,520		13,520

Ohio Power Co [Member] | Ohio Phase-In-Recovery Funding [Member]

Consolidated Assets And Liabilities Of Variable Interest Entities [Table Text Block]

OHIO POWER COMPANY AND SUBSIDIARIES
VARIABLE INTEREST ENTITIES
December 31, 2014 and 2013
(in thousands)
	Ohio Phase-in-Recovery Funding
ASSETS	2014		2013
Current Assets	$	32,676	$	23,198
Other Noncurrent Assets (a)	209,922		251,409
Total Assets	$	242,598	$	274,607
LIABILITIES AND EQUITY
Current Liabilities	$	47,099	$	36,470
Noncurrent Liabilities	194,162		236,800
Equity	1,337		1,337
Total Liabilities and Equity	$	242,598	$	274,607

(a) Includes an intercompany item eliminated in consolidation as of December 31, 2014 and 2013 of $97 million and $116 million, respectively. 

Public Service Co Of Oklahoma [Member] | Billings from AEP Service Corporation [Member]

Billings from Significant Variable Interest

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	216,470	$	174,393	$	195,176
I&M	133,194		119,343		127,232
OPCo	168,956		255,485		277,232
PSO	101,421		85,974		89,199
SWEPCo	140,286		125,441		136,642

Public Service Co Of Oklahoma [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]

Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block]

	December 31,
	2014				2013
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
APCo	$	30,692	$	30,692	$	20,191	$	20,191
I&M	22,480		22,480		12,864		12,864
OPCo	24,695		24,695		31,425		31,425
PSO	15,338		15,338		10,596		10,596
SWEPCo	20,772		20,772		13,520		13,520

Southwestern Electric Power Co [Member] | Billings from AEP Service Corporation [Member]

Billings from Significant Variable Interest

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	216,470	$	174,393	$	195,176
I&M	133,194		119,343		127,232
OPCo	168,956		255,485		277,232
PSO	101,421		85,974		89,199
SWEPCo	140,286		125,441		136,642

Southwestern Electric Power Co [Member] | Carrying Amount in AEP Service Corporation's Accounts Payable [Member]

Carrying Amount and Classification of Variable Interest in Accounts Payable [Text Block]

	December 31,
	2014				2013
Company	As Reported on the Balance Sheet		Maximum Exposure		As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
APCo	$	30,692	$	30,692	$	20,191	$	20,191
I&M	22,480		22,480		12,864		12,864
OPCo	24,695		24,695		31,425		31,425
PSO	15,338		15,338		10,596		10,596
SWEPCo	20,772		20,772		13,520		13,520

Southwestern Electric Power Co [Member] | Sabine Mining Co [Member]

Consolidated Assets And Liabilities Of Variable Interest Entities [Table Text Block]

SOUTHWESTERN ELECTRIC POWER COMPANY CONSOLIDATED
VARIABLE INTEREST ENTITIES
December 31, 2014 and 2013
(in thousands)
	Sabine
	2014		2013
ASSETS
Current Assets	$	67,981	$	66,478
Net Property, Plant and Equipment	145,491		157,274
Other Noncurrent Assets	51,578		51,211
Total Assets	$	265,050	$	274,963
LIABILITIES AND EQUITY
Current Liabilities	$	36,286	$	32,812
Noncurrent Liabilities	228,349		241,673
Equity	415		478
Total Liabilities and Equity	$	265,050	$	274,963

Southwestern Electric Power Co [Member] | Dolet Hills Lignite Co, LLC [Member]

Companys Investment In Joint Venture

	December 31,
	2014					2013
	As Reported on the Balance Sheet		Maximum Exposure			As Reported on the Balance Sheet		Maximum Exposure
	(in thousands)
Capital Contribution from SWEPCo	$	7,643	$	7,643		$	7,643	$	7,643
Retained Earnings	3,819		3,819			1,600		1,600
SWEPCo's Guarantee of Debt	—		104,334		(a)	—		61,348
Total Investment in DHLC	$	11,462	$	115,796		$	9,243	$	70,591

(a) Includes affiliate advances due to Parent related to participation in the Utility Money Pool of $56 million in 2014.