Financing Activities (Tables)

12 Months Ended

Dec. 31, 2014

AEP Common Stock

Shares of AEP Common Stock	Issued	Held in Treasury
Balance, December 31, 2011	503,759,460	20,336,592
Issued	2,245,502	—
Balance, December 31, 2012	506,004,962	20,336,592
Issued	2,109,002	—
Balance, December 31, 2013	508,113,964	20,336,592
Issued	1,625,195	—
Balance, December 31, 2014	509,739,159	20,336,592

Long-term Debt

	Weighted
	Average
	Interest
	Rate as of	Interest Rate Ranges as of		Outstanding as of
	December 31,	December 31,		December 31,
Type of Debt and Maturity	2014	2014	2013	2014			2013
				(in millions)
Senior Unsecured Notes
2014-2044	5.34%	1.65%-8.13%	1.65%-8.13%	$	12,647		$	11,799
Pollution Control Bonds (a)
2014-2038 (b)	2.66%	0.04%-6.30%	0.02%-6.30%	1,963			1,932
Notes Payable (c)
2014-2032	3.84%	0.983%-8.03%	1.164%-8.03%	357			369
Securitization Bonds
2015-2031	3.69%	0.88%-6.25%	0.88%-6.25%	2,380			2,686
Spent Nuclear Fuel Obligation (d)				266			265
Other Long-term Debt
2015-2059	1.67%	1.15%-13.718%	1.15%-13.718%	1,101			1,360
Fair Value of Interest Rate Hedges				(6		)	(9		)
Unamortized Discount, Net				(24		)	(25		)
Total Long-term Debt Outstanding				18,684			18,377
Long-term Debt Due Within One Year				2,503			1,549
Long-term Debt				$	16,181		$	16,828

(a) For certain series of pollution control bonds, interest rates are subject to periodic adjustment.  Certain series may be purchased on demand at periodic interest adjustment dates.  Letters of credit from banks and insurance policies support certain series.

(b) Certain pollution control bonds are subject to redemption earlier than the maturity date.  Consequently, these bonds have been classified for maturity purposes as Long-term Debt Due Within One Year on the balance sheets.

(c) Notes payable represent outstanding promissory notes issued under term loan agreements and credit agreements with a number of banks and other financial institutions.  At expiration, all notes then issued and outstanding are due and payable.  Interest rates are both fixed and variable.  Variable rates generally relate to specified short-term interest rates.

(d) Spent nuclear fuel obligation consists of a liability along with accrued interest for disposal of spent nuclear fuel (see "SNF Disposal" section of Note 6).

Long-term Debt 5-Year Maturity

	2015		2016		2017		2018		2019		After 2019		Total
	(in millions)
Principal Amount	$	2,503	$	1,306	$	1,871	$	1,417	$	1,673	$	9,938	$	18,708
Unamortized Discount, Net													(24		)
Total Long-term Debt Outstanding													$	18,684

Lines of Credit and Short-term Debt

	December 31,
	2014				2013
Type of Debt	Outstanding Amount		Interest Rate (a)		Outstanding Amount		Interest Rate (a)
	(in millions)				(in millions)
Securitized Debt for Receivables (b)	$	744	0.22	%	$	700	0.23	%
Commercial Paper	602		0.59	%	57		0.29	%
Total Short-term Debt	$	1,346			$	757

(a) Weighted average rate.

(b) Amount of securitized debt for receivables as accounted for under the "Transfers and Servicing" accounting guidance.

Comparative Accounts Receivable Information

	Years Ended December 31,
	2014			2013			2012
	(dollars in millions)
Effective Interest Rates on Securitization of Accounts Receivable	0.22		%	0.23		%	0.26		%
Net Uncollectible Accounts Receivable Written Off	$	40		$	35		$	29

Customer Accounts Receivable Managed Portfolio

	December 31,
	2014		2013
	(in millions)
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	$	975	$	929
Total Principal Outstanding	744		700
Delinquent Securitized Accounts Receivable	44		45
Bad Debt Reserves Related to Securitization/Sale of Accounts Receivable	13		16
Unbilled Receivables Related to Securitization/Sale of Accounts Receivable	335		331

Appalachian Power Co [Member]

Long-term Debt

		Weighted
		Average
		Interest
		Rate as of	Interest Rate Ranges as of		Outstanding as of
		December 31,	December 31,		December 31,
Company	Maturity	2014	2014	2013	2014		2013
Senior Unsecured Notes					(in thousands)
APCo	2015-2044	5.80%	3.40%-7.95%	3.40%-7.95%	$	2,991,846	$	2,893,220
I&M	2015-2037	5.80%	3.20%-7.00%	3.20%-7.00%	1,246,683		1,246,235
OPCo	2014-2035	5.98%	5.375%-6.60%	4.85%-6.60%	1,945,036		2,169,487
PSO	2016-2037	5.52%	4.40%-6.625%	4.40%-6.625%	897,046		896,705
SWEPCo	2015-2040	5.56%	3.55%-6.45%	3.55%-6.45%	1,823,362		1,823,007
Pollution Control Bonds (a)
APCo	2014-2038 (b)	1.68%	0.04%-5.375%	0.05%-5.375%	532,500		532,500
I&M	2014-2025 (b)	1.80%	0.04%-4.625%	0.04%-6.25%	226,607		226,569
OPCo	2014-2038 (b)	3.85%	3.125%-5.80%	2.875%-5.80%	118,245		296,825
PSO	2014-2020	4.45%	4.45%	4.45%-5.25%	12,660		46,360
SWEPCo	2015-2018 (b)	4.28%	3.25%-4.95%	3.25%-4.95%	135,200		135,200
Notes Payable – Affiliated
APCo	2015	3.125%	3.125%	3.125%	86,000		86,000
Notes Payable – Nonaffiliated
I&M	2014-2019	1.14%	0.983%-2.12%	1.164%-4.00%	176,697		177,540
SWEPCo	2024-2032	5.13%	4.58%-6.37%	4.58%-6.37%	81,875		85,125
Securitization Bonds
APCo	2024-2031	2.80%	2.008%-3.772%	2.008%-3.772%	367,606		380,282
OPCo	2018-2020	1.44%	0.958%-2.049%	0.958%-2.049%	232,467		267,403
Spent Nuclear Fuel Obligation (c)
I&M					265,502		265,391
Other Long-term Debt
APCo (d)	2015-2026	13.718%	13.718%	1.188%-13.718%	2,322		302,355
I&M	2015-2025	2.28%	1.55%-6.00%	1.67%-6.00%	111,908		123,281
OPCo	2028	1.15%	1.15%	1.15%	1,375		1,460
PSO (e)	2016-2027	1.57%	1.482%-3.00%	1.491%-3.00%	131,330		56,745
SWEPCo (f)	2017	1.73%	1.73%		100,000		—

(a) For certain series of pollution control bonds, interest rates are subject to periodic adjustment.  Certain series may be purchased on demand at periodic interest adjustment dates.  Letters of credit from banks and insurance policies support certain series.

(b) Certain pollution control bonds are subject to redemption earlier than the maturity date.  Consequently, these bonds have been classified for maturity purposes as Long-term Debt Due Within One Year - Nonaffiliated on the balance sheets.

(c) Spent nuclear fuel obligation consists of a liability along with accrued interest for disposal of spent nuclear fuel (see "SNF Disposal" section of Note 6).

(d) In 2014, APCo retired a $300 million credit facility due in 2015.

(e) In 2014, PSO drew the remaining $75 million on an existing $125 million three-year credit facility.

(f) In 2014, SWEPCo issued a $100 million three-year credit facility.

Long-term Debt 5-Year Maturity

	APCo			I&M			OPCo			PSO			SWEPCo
	(in thousands)
2015	$	638,212		$	382,187		$	131,497		$	427		$	306,750
2016	88,372			49,189			395,946			275,440			3,250
2017	273,492			37,131			46,387			454			353,250
2018	123,972			106,444			397,045			467			384,950
2019	94,463			479,353			48,016			250,482			403,250
After 2019	2,769,933			976,803			1,283,200			516,720			690,625
Principal Amount	3,988,444			2,031,107			2,302,091			1,043,990			2,142,075
Unamortized Discount, Net	(8,170		)	(3,710		)	(4,968		)	(2,954		)	(1,638		)
Total Long-term Debt Outstanding	$	3,980,274		$	2,027,397		$	2,297,123		$	1,041,036		$	2,140,437

Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits

Year Ended December 31, 2014:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2014			Limit
	(in thousands)
APCo	$	44,215	$	542,186	$	12,566	$	104,469	$	48,519		$	600,000
I&M	150,714		158,857		73,192		39,118		(129,020		)	500,000
OPCo	120,264		405,350		34,841		107,275		312,473			400,000
PSO	176,950		—		93,732		—		(154,249		)	300,000
SWEPCo	153,503		51,319		71,009		24,392		41,033			350,000

Year Ended December 31, 2013:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2013			Limit
	(in thousands)
APCo	$	331,771	$	202,377	$	141,128	$	28,659	$	92,485		$	600,000
I&M	23,135		403,905		8,308		256,730		55,863			500,000
OPCo	410,456		415,605		190,384		50,230		339,070			600,000
PSO	46,806		109,607		18,754		28,771		(36,772		)	300,000
SWEPCo	24,553		153,830		6,020		33,546		(9,180		)	350,000

Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool

	Years Ended December 31,
	2014		2013		2012
Maximum Interest Rate	0.59	%	0.43	%	0.56	%
Minimum Interest Rate	0.24	%	0.24	%	0.39	%

Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool

	Average Interest Rate  for Funds Borrowed from the Utility Money Pool for Years Ended December 31,						Average Interest Rate  for Funds Loaned to the Utility Money Pool for Years Ended December 31,
Company	2014		2013		2012		2014		2013		2012
APCo	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%	0.47	%
I&M	0.31	%	0.36	%	—	%	0.30	%	0.32	%	0.46	%
OPCo	0.27	%	0.33	%	0.47	%	0.34	%	0.32	%	0.47	%
PSO	0.29	%	0.34	%	—	%	—	%	0.33	%	0.46	%
SWEPCo	0.29	%	0.34	%	0.53	%	0.32	%	0.36	%	0.45	%

Interest Expense Incurred by Registrant Subsidiaries' for amounts borrowed from the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	6	$	414	$	772
I&M	135		70		—
OPCo	43		503		555
PSO	275		25		11
SWEPCo	168		5		977

Interest Income Earned by Registrant Subsidiaries' for Amounts Advanced to the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	317	$	109	$	123
I&M	127		924		963
OPCo	202		233		1,038
PSO	—		58		435
SWEPCo	14		113		320

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2014		2013
	(in thousands)
APCo	$	159,823	$	156,599
I&M	137,459		139,257
OPCo	365,834		324,287
PSO	112,905		115,260
SWEPCo	148,668		149,337

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	8,896	$	6,471	$	6,883
I&M	7,900		6,510		6,121
OPCo	28,809		21,573		20,312
PSO	5,926		5,604		7,054
SWEPCo	6,750		5,917		6,140

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	1,519,266	$	1,442,983	$	1,353,920
I&M	1,488,561		1,458,803		1,344,260
OPCo	2,647,643		2,620,483		2,952,723
PSO	1,321,068		1,232,363		1,157,174
SWEPCo	1,655,753		1,533,840		1,481,925

Indiana Michigan Power Co [Member]

Long-term Debt

		Weighted
		Average
		Interest
		Rate as of	Interest Rate Ranges as of		Outstanding as of
		December 31,	December 31,		December 31,
Company	Maturity	2014	2014	2013	2014		2013
Senior Unsecured Notes					(in thousands)
APCo	2015-2044	5.80%	3.40%-7.95%	3.40%-7.95%	$	2,991,846	$	2,893,220
I&M	2015-2037	5.80%	3.20%-7.00%	3.20%-7.00%	1,246,683		1,246,235
OPCo	2014-2035	5.98%	5.375%-6.60%	4.85%-6.60%	1,945,036		2,169,487
PSO	2016-2037	5.52%	4.40%-6.625%	4.40%-6.625%	897,046		896,705
SWEPCo	2015-2040	5.56%	3.55%-6.45%	3.55%-6.45%	1,823,362		1,823,007
Pollution Control Bonds (a)
APCo	2014-2038 (b)	1.68%	0.04%-5.375%	0.05%-5.375%	532,500		532,500
I&M	2014-2025 (b)	1.80%	0.04%-4.625%	0.04%-6.25%	226,607		226,569
OPCo	2014-2038 (b)	3.85%	3.125%-5.80%	2.875%-5.80%	118,245		296,825
PSO	2014-2020	4.45%	4.45%	4.45%-5.25%	12,660		46,360
SWEPCo	2015-2018 (b)	4.28%	3.25%-4.95%	3.25%-4.95%	135,200		135,200
Notes Payable – Affiliated
APCo	2015	3.125%	3.125%	3.125%	86,000		86,000
Notes Payable – Nonaffiliated
I&M	2014-2019	1.14%	0.983%-2.12%	1.164%-4.00%	176,697		177,540
SWEPCo	2024-2032	5.13%	4.58%-6.37%	4.58%-6.37%	81,875		85,125
Securitization Bonds
APCo	2024-2031	2.80%	2.008%-3.772%	2.008%-3.772%	367,606		380,282
OPCo	2018-2020	1.44%	0.958%-2.049%	0.958%-2.049%	232,467		267,403
Spent Nuclear Fuel Obligation (c)
I&M					265,502		265,391
Other Long-term Debt
APCo (d)	2015-2026	13.718%	13.718%	1.188%-13.718%	2,322		302,355
I&M	2015-2025	2.28%	1.55%-6.00%	1.67%-6.00%	111,908		123,281
OPCo	2028	1.15%	1.15%	1.15%	1,375		1,460
PSO (e)	2016-2027	1.57%	1.482%-3.00%	1.491%-3.00%	131,330		56,745
SWEPCo (f)	2017	1.73%	1.73%		100,000		—

(a) For certain series of pollution control bonds, interest rates are subject to periodic adjustment.  Certain series may be purchased on demand at periodic interest adjustment dates.  Letters of credit from banks and insurance policies support certain series.

(b) Certain pollution control bonds are subject to redemption earlier than the maturity date.  Consequently, these bonds have been classified for maturity purposes as Long-term Debt Due Within One Year - Nonaffiliated on the balance sheets.

(c) Spent nuclear fuel obligation consists of a liability along with accrued interest for disposal of spent nuclear fuel (see "SNF Disposal" section of Note 6).

(d) In 2014, APCo retired a $300 million credit facility due in 2015.

(e) In 2014, PSO drew the remaining $75 million on an existing $125 million three-year credit facility.

(f) In 2014, SWEPCo issued a $100 million three-year credit facility.

Long-term Debt 5-Year Maturity

	APCo			I&M			OPCo			PSO			SWEPCo
	(in thousands)
2015	$	638,212		$	382,187		$	131,497		$	427		$	306,750
2016	88,372			49,189			395,946			275,440			3,250
2017	273,492			37,131			46,387			454			353,250
2018	123,972			106,444			397,045			467			384,950
2019	94,463			479,353			48,016			250,482			403,250
After 2019	2,769,933			976,803			1,283,200			516,720			690,625
Principal Amount	3,988,444			2,031,107			2,302,091			1,043,990			2,142,075
Unamortized Discount, Net	(8,170		)	(3,710		)	(4,968		)	(2,954		)	(1,638		)
Total Long-term Debt Outstanding	$	3,980,274		$	2,027,397		$	2,297,123		$	1,041,036		$	2,140,437

Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits

Year Ended December 31, 2014:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2014			Limit
	(in thousands)
APCo	$	44,215	$	542,186	$	12,566	$	104,469	$	48,519		$	600,000
I&M	150,714		158,857		73,192		39,118		(129,020		)	500,000
OPCo	120,264		405,350		34,841		107,275		312,473			400,000
PSO	176,950		—		93,732		—		(154,249		)	300,000
SWEPCo	153,503		51,319		71,009		24,392		41,033			350,000

Year Ended December 31, 2013:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2013			Limit
	(in thousands)
APCo	$	331,771	$	202,377	$	141,128	$	28,659	$	92,485		$	600,000
I&M	23,135		403,905		8,308		256,730		55,863			500,000
OPCo	410,456		415,605		190,384		50,230		339,070			600,000
PSO	46,806		109,607		18,754		28,771		(36,772		)	300,000
SWEPCo	24,553		153,830		6,020		33,546		(9,180		)	350,000

Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool

	Years Ended December 31,
	2014		2013		2012
Maximum Interest Rate	0.59	%	0.43	%	0.56	%
Minimum Interest Rate	0.24	%	0.24	%	0.39	%

Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool

	Average Interest Rate  for Funds Borrowed from the Utility Money Pool for Years Ended December 31,						Average Interest Rate  for Funds Loaned to the Utility Money Pool for Years Ended December 31,
Company	2014		2013		2012		2014		2013		2012
APCo	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%	0.47	%
I&M	0.31	%	0.36	%	—	%	0.30	%	0.32	%	0.46	%
OPCo	0.27	%	0.33	%	0.47	%	0.34	%	0.32	%	0.47	%
PSO	0.29	%	0.34	%	—	%	—	%	0.33	%	0.46	%
SWEPCo	0.29	%	0.34	%	0.53	%	0.32	%	0.36	%	0.45	%

Interest Expense Incurred by Registrant Subsidiaries' for amounts borrowed from the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	6	$	414	$	772
I&M	135		70		—
OPCo	43		503		555
PSO	275		25		11
SWEPCo	168		5		977

Interest Income Earned by Registrant Subsidiaries' for Amounts Advanced to the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	317	$	109	$	123
I&M	127		924		963
OPCo	202		233		1,038
PSO	—		58		435
SWEPCo	14		113		320

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2014		2013
	(in thousands)
APCo	$	159,823	$	156,599
I&M	137,459		139,257
OPCo	365,834		324,287
PSO	112,905		115,260
SWEPCo	148,668		149,337

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	8,896	$	6,471	$	6,883
I&M	7,900		6,510		6,121
OPCo	28,809		21,573		20,312
PSO	5,926		5,604		7,054
SWEPCo	6,750		5,917		6,140

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	1,519,266	$	1,442,983	$	1,353,920
I&M	1,488,561		1,458,803		1,344,260
OPCo	2,647,643		2,620,483		2,952,723
PSO	1,321,068		1,232,363		1,157,174
SWEPCo	1,655,753		1,533,840		1,481,925

Ohio Power Co [Member]

Long-term Debt

		Weighted
		Average
		Interest
		Rate as of	Interest Rate Ranges as of		Outstanding as of
		December 31,	December 31,		December 31,
Company	Maturity	2014	2014	2013	2014		2013
Senior Unsecured Notes					(in thousands)
APCo	2015-2044	5.80%	3.40%-7.95%	3.40%-7.95%	$	2,991,846	$	2,893,220
I&M	2015-2037	5.80%	3.20%-7.00%	3.20%-7.00%	1,246,683		1,246,235
OPCo	2014-2035	5.98%	5.375%-6.60%	4.85%-6.60%	1,945,036		2,169,487
PSO	2016-2037	5.52%	4.40%-6.625%	4.40%-6.625%	897,046		896,705
SWEPCo	2015-2040	5.56%	3.55%-6.45%	3.55%-6.45%	1,823,362		1,823,007
Pollution Control Bonds (a)
APCo	2014-2038 (b)	1.68%	0.04%-5.375%	0.05%-5.375%	532,500		532,500
I&M	2014-2025 (b)	1.80%	0.04%-4.625%	0.04%-6.25%	226,607		226,569
OPCo	2014-2038 (b)	3.85%	3.125%-5.80%	2.875%-5.80%	118,245		296,825
PSO	2014-2020	4.45%	4.45%	4.45%-5.25%	12,660		46,360
SWEPCo	2015-2018 (b)	4.28%	3.25%-4.95%	3.25%-4.95%	135,200		135,200
Notes Payable – Affiliated
APCo	2015	3.125%	3.125%	3.125%	86,000		86,000
Notes Payable – Nonaffiliated
I&M	2014-2019	1.14%	0.983%-2.12%	1.164%-4.00%	176,697		177,540
SWEPCo	2024-2032	5.13%	4.58%-6.37%	4.58%-6.37%	81,875		85,125
Securitization Bonds
APCo	2024-2031	2.80%	2.008%-3.772%	2.008%-3.772%	367,606		380,282
OPCo	2018-2020	1.44%	0.958%-2.049%	0.958%-2.049%	232,467		267,403
Spent Nuclear Fuel Obligation (c)
I&M					265,502		265,391
Other Long-term Debt
APCo (d)	2015-2026	13.718%	13.718%	1.188%-13.718%	2,322		302,355
I&M	2015-2025	2.28%	1.55%-6.00%	1.67%-6.00%	111,908		123,281
OPCo	2028	1.15%	1.15%	1.15%	1,375		1,460
PSO (e)	2016-2027	1.57%	1.482%-3.00%	1.491%-3.00%	131,330		56,745
SWEPCo (f)	2017	1.73%	1.73%		100,000		—

(a) For certain series of pollution control bonds, interest rates are subject to periodic adjustment.  Certain series may be purchased on demand at periodic interest adjustment dates.  Letters of credit from banks and insurance policies support certain series.

(b) Certain pollution control bonds are subject to redemption earlier than the maturity date.  Consequently, these bonds have been classified for maturity purposes as Long-term Debt Due Within One Year - Nonaffiliated on the balance sheets.

(c) Spent nuclear fuel obligation consists of a liability along with accrued interest for disposal of spent nuclear fuel (see "SNF Disposal" section of Note 6).

(d) In 2014, APCo retired a $300 million credit facility due in 2015.

(e) In 2014, PSO drew the remaining $75 million on an existing $125 million three-year credit facility.

(f) In 2014, SWEPCo issued a $100 million three-year credit facility.

Long-term Debt 5-Year Maturity

	APCo			I&M			OPCo			PSO			SWEPCo
	(in thousands)
2015	$	638,212		$	382,187		$	131,497		$	427		$	306,750
2016	88,372			49,189			395,946			275,440			3,250
2017	273,492			37,131			46,387			454			353,250
2018	123,972			106,444			397,045			467			384,950
2019	94,463			479,353			48,016			250,482			403,250
After 2019	2,769,933			976,803			1,283,200			516,720			690,625
Principal Amount	3,988,444			2,031,107			2,302,091			1,043,990			2,142,075
Unamortized Discount, Net	(8,170		)	(3,710		)	(4,968		)	(2,954		)	(1,638		)
Total Long-term Debt Outstanding	$	3,980,274		$	2,027,397		$	2,297,123		$	1,041,036		$	2,140,437

Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits

Year Ended December 31, 2014:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2014			Limit
	(in thousands)
APCo	$	44,215	$	542,186	$	12,566	$	104,469	$	48,519		$	600,000
I&M	150,714		158,857		73,192		39,118		(129,020		)	500,000
OPCo	120,264		405,350		34,841		107,275		312,473			400,000
PSO	176,950		—		93,732		—		(154,249		)	300,000
SWEPCo	153,503		51,319		71,009		24,392		41,033			350,000

Year Ended December 31, 2013:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2013			Limit
	(in thousands)
APCo	$	331,771	$	202,377	$	141,128	$	28,659	$	92,485		$	600,000
I&M	23,135		403,905		8,308		256,730		55,863			500,000
OPCo	410,456		415,605		190,384		50,230		339,070			600,000
PSO	46,806		109,607		18,754		28,771		(36,772		)	300,000
SWEPCo	24,553		153,830		6,020		33,546		(9,180		)	350,000

Nonutility Money Pool Activity

									Borrowings
Year Ended	Maximum		Maximum		Average		Average		From as of
December 31, 2013	Borrowings From		Loans To		Borrowings From		Loans To		December 31, 2013
	(in thousands)
Nonutility Money Pool	$	1,047	$	1,027	$	316	$	208	$	—
Parent	1,178		—		1,078		—		—		(a)

(a) The borrowings of AGR from Parent as of December 31, 2013 are no longer associated with OPCo.

Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool

	Years Ended December 31,
	2014		2013		2012
Maximum Interest Rate	0.59	%	0.43	%	0.56	%
Minimum Interest Rate	0.24	%	0.24	%	0.39	%

Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool

	Average Interest Rate  for Funds Borrowed from the Utility Money Pool for Years Ended December 31,						Average Interest Rate  for Funds Loaned to the Utility Money Pool for Years Ended December 31,
Company	2014		2013		2012		2014		2013		2012
APCo	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%	0.47	%
I&M	0.31	%	0.36	%	—	%	0.30	%	0.32	%	0.46	%
OPCo	0.27	%	0.33	%	0.47	%	0.34	%	0.32	%	0.47	%
PSO	0.29	%	0.34	%	—	%	—	%	0.33	%	0.46	%
SWEPCo	0.29	%	0.34	%	0.53	%	0.32	%	0.36	%	0.45	%

Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool

Year Ended December 31, 2013	Maximum Interest Rate for Funds Borrowed		Minimum Interest Rate for Funds Borrowed		Maximum Interest Rate for Funds Loaned		Minimum Interest Rate for Funds Loaned		Average Interest Rate for Funds Borrowed		Average Interest Rate for Funds Loaned
Nonutility Money Pool	0.66	%	0.53	%	0.35	%	0.32	%	0.58	%	0.34	%
Parent	0.34	%	0.24	%	—	%	—	%	0.28	%	—	%

Interest Expense Incurred by Registrant Subsidiaries' for amounts borrowed from the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	6	$	414	$	772
I&M	135		70		—
OPCo	43		503		555
PSO	275		25		11
SWEPCo	168		5		977

Interest Income Earned by Registrant Subsidiaries' for Amounts Advanced to the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	317	$	109	$	123
I&M	127		924		963
OPCo	202		233		1,038
PSO	—		58		435
SWEPCo	14		113		320

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2014		2013
	(in thousands)
APCo	$	159,823	$	156,599
I&M	137,459		139,257
OPCo	365,834		324,287
PSO	112,905		115,260
SWEPCo	148,668		149,337

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	8,896	$	6,471	$	6,883
I&M	7,900		6,510		6,121
OPCo	28,809		21,573		20,312
PSO	5,926		5,604		7,054
SWEPCo	6,750		5,917		6,140

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	1,519,266	$	1,442,983	$	1,353,920
I&M	1,488,561		1,458,803		1,344,260
OPCo	2,647,643		2,620,483		2,952,723
PSO	1,321,068		1,232,363		1,157,174
SWEPCo	1,655,753		1,533,840		1,481,925

Public Service Co Of Oklahoma [Member]

Long-term Debt

		Weighted
		Average
		Interest
		Rate as of	Interest Rate Ranges as of		Outstanding as of
		December 31,	December 31,		December 31,
Company	Maturity	2014	2014	2013	2014		2013
Senior Unsecured Notes					(in thousands)
APCo	2015-2044	5.80%	3.40%-7.95%	3.40%-7.95%	$	2,991,846	$	2,893,220
I&M	2015-2037	5.80%	3.20%-7.00%	3.20%-7.00%	1,246,683		1,246,235
OPCo	2014-2035	5.98%	5.375%-6.60%	4.85%-6.60%	1,945,036		2,169,487
PSO	2016-2037	5.52%	4.40%-6.625%	4.40%-6.625%	897,046		896,705
SWEPCo	2015-2040	5.56%	3.55%-6.45%	3.55%-6.45%	1,823,362		1,823,007
Pollution Control Bonds (a)
APCo	2014-2038 (b)	1.68%	0.04%-5.375%	0.05%-5.375%	532,500		532,500
I&M	2014-2025 (b)	1.80%	0.04%-4.625%	0.04%-6.25%	226,607		226,569
OPCo	2014-2038 (b)	3.85%	3.125%-5.80%	2.875%-5.80%	118,245		296,825
PSO	2014-2020	4.45%	4.45%	4.45%-5.25%	12,660		46,360
SWEPCo	2015-2018 (b)	4.28%	3.25%-4.95%	3.25%-4.95%	135,200		135,200
Notes Payable – Affiliated
APCo	2015	3.125%	3.125%	3.125%	86,000		86,000
Notes Payable – Nonaffiliated
I&M	2014-2019	1.14%	0.983%-2.12%	1.164%-4.00%	176,697		177,540
SWEPCo	2024-2032	5.13%	4.58%-6.37%	4.58%-6.37%	81,875		85,125
Securitization Bonds
APCo	2024-2031	2.80%	2.008%-3.772%	2.008%-3.772%	367,606		380,282
OPCo	2018-2020	1.44%	0.958%-2.049%	0.958%-2.049%	232,467		267,403
Spent Nuclear Fuel Obligation (c)
I&M					265,502		265,391
Other Long-term Debt
APCo (d)	2015-2026	13.718%	13.718%	1.188%-13.718%	2,322		302,355
I&M	2015-2025	2.28%	1.55%-6.00%	1.67%-6.00%	111,908		123,281
OPCo	2028	1.15%	1.15%	1.15%	1,375		1,460
PSO (e)	2016-2027	1.57%	1.482%-3.00%	1.491%-3.00%	131,330		56,745
SWEPCo (f)	2017	1.73%	1.73%		100,000		—

(a) For certain series of pollution control bonds, interest rates are subject to periodic adjustment.  Certain series may be purchased on demand at periodic interest adjustment dates.  Letters of credit from banks and insurance policies support certain series.

(b) Certain pollution control bonds are subject to redemption earlier than the maturity date.  Consequently, these bonds have been classified for maturity purposes as Long-term Debt Due Within One Year - Nonaffiliated on the balance sheets.

(c) Spent nuclear fuel obligation consists of a liability along with accrued interest for disposal of spent nuclear fuel (see "SNF Disposal" section of Note 6).

(d) In 2014, APCo retired a $300 million credit facility due in 2015.

(e) In 2014, PSO drew the remaining $75 million on an existing $125 million three-year credit facility.

(f) In 2014, SWEPCo issued a $100 million three-year credit facility.

Long-term Debt 5-Year Maturity

	APCo			I&M			OPCo			PSO			SWEPCo
	(in thousands)
2015	$	638,212		$	382,187		$	131,497		$	427		$	306,750
2016	88,372			49,189			395,946			275,440			3,250
2017	273,492			37,131			46,387			454			353,250
2018	123,972			106,444			397,045			467			384,950
2019	94,463			479,353			48,016			250,482			403,250
After 2019	2,769,933			976,803			1,283,200			516,720			690,625
Principal Amount	3,988,444			2,031,107			2,302,091			1,043,990			2,142,075
Unamortized Discount, Net	(8,170		)	(3,710		)	(4,968		)	(2,954		)	(1,638		)
Total Long-term Debt Outstanding	$	3,980,274		$	2,027,397		$	2,297,123		$	1,041,036		$	2,140,437

Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits

Year Ended December 31, 2014:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2014			Limit
	(in thousands)
APCo	$	44,215	$	542,186	$	12,566	$	104,469	$	48,519		$	600,000
I&M	150,714		158,857		73,192		39,118		(129,020		)	500,000
OPCo	120,264		405,350		34,841		107,275		312,473			400,000
PSO	176,950		—		93,732		—		(154,249		)	300,000
SWEPCo	153,503		51,319		71,009		24,392		41,033			350,000

Year Ended December 31, 2013:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2013			Limit
	(in thousands)
APCo	$	331,771	$	202,377	$	141,128	$	28,659	$	92,485		$	600,000
I&M	23,135		403,905		8,308		256,730		55,863			500,000
OPCo	410,456		415,605		190,384		50,230		339,070			600,000
PSO	46,806		109,607		18,754		28,771		(36,772		)	300,000
SWEPCo	24,553		153,830		6,020		33,546		(9,180		)	350,000

Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool

	Years Ended December 31,
	2014		2013		2012
Maximum Interest Rate	0.59	%	0.43	%	0.56	%
Minimum Interest Rate	0.24	%	0.24	%	0.39	%

Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool

	Average Interest Rate  for Funds Borrowed from the Utility Money Pool for Years Ended December 31,						Average Interest Rate  for Funds Loaned to the Utility Money Pool for Years Ended December 31,
Company	2014		2013		2012		2014		2013		2012
APCo	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%	0.47	%
I&M	0.31	%	0.36	%	—	%	0.30	%	0.32	%	0.46	%
OPCo	0.27	%	0.33	%	0.47	%	0.34	%	0.32	%	0.47	%
PSO	0.29	%	0.34	%	—	%	—	%	0.33	%	0.46	%
SWEPCo	0.29	%	0.34	%	0.53	%	0.32	%	0.36	%	0.45	%

Interest Expense Incurred by Registrant Subsidiaries' for amounts borrowed from the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	6	$	414	$	772
I&M	135		70		—
OPCo	43		503		555
PSO	275		25		11
SWEPCo	168		5		977

Interest Income Earned by Registrant Subsidiaries' for Amounts Advanced to the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	317	$	109	$	123
I&M	127		924		963
OPCo	202		233		1,038
PSO	—		58		435
SWEPCo	14		113		320

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2014		2013
	(in thousands)
APCo	$	159,823	$	156,599
I&M	137,459		139,257
OPCo	365,834		324,287
PSO	112,905		115,260
SWEPCo	148,668		149,337

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	8,896	$	6,471	$	6,883
I&M	7,900		6,510		6,121
OPCo	28,809		21,573		20,312
PSO	5,926		5,604		7,054
SWEPCo	6,750		5,917		6,140

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	1,519,266	$	1,442,983	$	1,353,920
I&M	1,488,561		1,458,803		1,344,260
OPCo	2,647,643		2,620,483		2,952,723
PSO	1,321,068		1,232,363		1,157,174
SWEPCo	1,655,753		1,533,840		1,481,925

Southwestern Electric Power Co [Member]

Long-term Debt

		Weighted
		Average
		Interest
		Rate as of	Interest Rate Ranges as of		Outstanding as of
		December 31,	December 31,		December 31,
Company	Maturity	2014	2014	2013	2014		2013
Senior Unsecured Notes					(in thousands)
APCo	2015-2044	5.80%	3.40%-7.95%	3.40%-7.95%	$	2,991,846	$	2,893,220
I&M	2015-2037	5.80%	3.20%-7.00%	3.20%-7.00%	1,246,683		1,246,235
OPCo	2014-2035	5.98%	5.375%-6.60%	4.85%-6.60%	1,945,036		2,169,487
PSO	2016-2037	5.52%	4.40%-6.625%	4.40%-6.625%	897,046		896,705
SWEPCo	2015-2040	5.56%	3.55%-6.45%	3.55%-6.45%	1,823,362		1,823,007
Pollution Control Bonds (a)
APCo	2014-2038 (b)	1.68%	0.04%-5.375%	0.05%-5.375%	532,500		532,500
I&M	2014-2025 (b)	1.80%	0.04%-4.625%	0.04%-6.25%	226,607		226,569
OPCo	2014-2038 (b)	3.85%	3.125%-5.80%	2.875%-5.80%	118,245		296,825
PSO	2014-2020	4.45%	4.45%	4.45%-5.25%	12,660		46,360
SWEPCo	2015-2018 (b)	4.28%	3.25%-4.95%	3.25%-4.95%	135,200		135,200
Notes Payable – Affiliated
APCo	2015	3.125%	3.125%	3.125%	86,000		86,000
Notes Payable – Nonaffiliated
I&M	2014-2019	1.14%	0.983%-2.12%	1.164%-4.00%	176,697		177,540
SWEPCo	2024-2032	5.13%	4.58%-6.37%	4.58%-6.37%	81,875		85,125
Securitization Bonds
APCo	2024-2031	2.80%	2.008%-3.772%	2.008%-3.772%	367,606		380,282
OPCo	2018-2020	1.44%	0.958%-2.049%	0.958%-2.049%	232,467		267,403
Spent Nuclear Fuel Obligation (c)
I&M					265,502		265,391
Other Long-term Debt
APCo (d)	2015-2026	13.718%	13.718%	1.188%-13.718%	2,322		302,355
I&M	2015-2025	2.28%	1.55%-6.00%	1.67%-6.00%	111,908		123,281
OPCo	2028	1.15%	1.15%	1.15%	1,375		1,460
PSO (e)	2016-2027	1.57%	1.482%-3.00%	1.491%-3.00%	131,330		56,745
SWEPCo (f)	2017	1.73%	1.73%		100,000		—

(a) For certain series of pollution control bonds, interest rates are subject to periodic adjustment.  Certain series may be purchased on demand at periodic interest adjustment dates.  Letters of credit from banks and insurance policies support certain series.

(b) Certain pollution control bonds are subject to redemption earlier than the maturity date.  Consequently, these bonds have been classified for maturity purposes as Long-term Debt Due Within One Year - Nonaffiliated on the balance sheets.

(c) Spent nuclear fuel obligation consists of a liability along with accrued interest for disposal of spent nuclear fuel (see "SNF Disposal" section of Note 6).

(d) In 2014, APCo retired a $300 million credit facility due in 2015.

(e) In 2014, PSO drew the remaining $75 million on an existing $125 million three-year credit facility.

(f) In 2014, SWEPCo issued a $100 million three-year credit facility.

Long-term Debt 5-Year Maturity

	APCo			I&M			OPCo			PSO			SWEPCo
	(in thousands)
2015	$	638,212		$	382,187		$	131,497		$	427		$	306,750
2016	88,372			49,189			395,946			275,440			3,250
2017	273,492			37,131			46,387			454			353,250
2018	123,972			106,444			397,045			467			384,950
2019	94,463			479,353			48,016			250,482			403,250
After 2019	2,769,933			976,803			1,283,200			516,720			690,625
Principal Amount	3,988,444			2,031,107			2,302,091			1,043,990			2,142,075
Unamortized Discount, Net	(8,170		)	(3,710		)	(4,968		)	(2,954		)	(1,638		)
Total Long-term Debt Outstanding	$	3,980,274		$	2,027,397		$	2,297,123		$	1,041,036		$	2,140,437

Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits

Year Ended December 31, 2014:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2014			Limit
	(in thousands)
APCo	$	44,215	$	542,186	$	12,566	$	104,469	$	48,519		$	600,000
I&M	150,714		158,857		73,192		39,118		(129,020		)	500,000
OPCo	120,264		405,350		34,841		107,275		312,473			400,000
PSO	176,950		—		93,732		—		(154,249		)	300,000
SWEPCo	153,503		51,319		71,009		24,392		41,033			350,000

Year Ended December 31, 2013:

	Maximum				Average				Net Loans to
	Borrowings		Maximum		Borrowings		Average		(Borrowings from)			Authorized
	from the		Loans to the		from the		Loans to the		the Utility Money			Short-term
	Utility		Utility		Utility		Utility		Pool as of			Borrowing
Company	Money Pool		Money Pool		Money Pool		Money Pool		December 31, 2013			Limit
	(in thousands)
APCo	$	331,771	$	202,377	$	141,128	$	28,659	$	92,485		$	600,000
I&M	23,135		403,905		8,308		256,730		55,863			500,000
OPCo	410,456		415,605		190,384		50,230		339,070			600,000
PSO	46,806		109,607		18,754		28,771		(36,772		)	300,000
SWEPCo	24,553		153,830		6,020		33,546		(9,180		)	350,000

Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool

	Years Ended December 31,
	2014		2013		2012
Maximum Interest Rate	0.59	%	0.43	%	0.56	%
Minimum Interest Rate	0.24	%	0.24	%	0.39	%

Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool

	Average Interest Rate  for Funds Borrowed from the Utility Money Pool for Years Ended December 31,						Average Interest Rate  for Funds Loaned to the Utility Money Pool for Years Ended December 31,
Company	2014		2013		2012		2014		2013		2012
APCo	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%	0.47	%
I&M	0.31	%	0.36	%	—	%	0.30	%	0.32	%	0.46	%
OPCo	0.27	%	0.33	%	0.47	%	0.34	%	0.32	%	0.47	%
PSO	0.29	%	0.34	%	—	%	—	%	0.33	%	0.46	%
SWEPCo	0.29	%	0.34	%	0.53	%	0.32	%	0.36	%	0.45	%

Interest Expense Incurred by Registrant Subsidiaries' for amounts borrowed from the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	6	$	414	$	772
I&M	135		70		—
OPCo	43		503		555
PSO	275		25		11
SWEPCo	168		5		977

Interest Income Earned by Registrant Subsidiaries' for Amounts Advanced to the Utility Money Pool

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	317	$	109	$	123
I&M	127		924		963
OPCo	202		233		1,038
PSO	—		58		435
SWEPCo	14		113		320

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2014		2013
	(in thousands)
APCo	$	159,823	$	156,599
I&M	137,459		139,257
OPCo	365,834		324,287
PSO	112,905		115,260
SWEPCo	148,668		149,337

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	8,896	$	6,471	$	6,883
I&M	7,900		6,510		6,121
OPCo	28,809		21,573		20,312
PSO	5,926		5,604		7,054
SWEPCo	6,750		5,917		6,140

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2014		2013		2012
	(in thousands)
APCo	$	1,519,266	$	1,442,983	$	1,353,920
I&M	1,488,561		1,458,803		1,344,260
OPCo	2,647,643		2,620,483		2,952,723
PSO	1,321,068		1,232,363		1,157,174
SWEPCo	1,655,753		1,533,840		1,481,925