Financing Activities (Tables)

12 Months Ended

Dec. 31, 2015

AEP Common Stock

Shares of AEP Common Stock	Issued	Held in Treasury
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
Issued	1,650,014	—
Balance, December 31, 2015	511,389,173	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,
Company	Maturity	2015	2015	2014	2015		2014
AEP					(in millions)
Senior Unsecured Notes	2015-2045	5.09%	1.65%-8.13%	1.65%-8.13%	$	13,629.1	$	12,562.1
Pollution Control Bonds (a)	2015-2038 (b)	2.71%	0.01%-6.30%	0.04%-6.30%	1,784.8		1,951.8
Notes Payable – Nonaffiliated (c)	2016-2032	2.47%	0.925%-6.60%	0.983%-8.03%	264.7		274.1		(d)
Securitization Bonds	2015-2031	3.66%	0.88%-6.25%	0.88%-6.25%	2,024.0		2,360.9
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2059	1.62%	1.15%-13.718%	1.15%-13.718%	1,604.5		1,098.0
Total Long-term Debt Outstanding					$	19,572.7	$	18,512.4	(d)
APCo
Senior Unsecured Notes	2015-2045	5.39%	3.40%-7.00%	3.40%-7.95%	$	2,970.4	$	2,976.1
Pollution Control Bonds (a)	2015-2038 (b)	1.70%	0.01%-5.375%	0.04%-5.375%	616.5		530.6
Notes Payable – Affiliated	2015			3.125%	—		86.0
Securitization Bonds	2024-2031	2.85%	2.008%-3.772%	2.008%-3.772%	341.5		363.7
Other Long-term Debt	2026	13.718%	13.718%	13.718%	2.3		2.3
Total Long-term Debt Outstanding					$	3,930.7	$	3,958.7
I&M
Senior Unsecured Notes	2015-2037	5.82%	3.20%-7.00%	3.20%-7.00%	$	1,117.0	$	1,240.8
Pollution Control Bonds (a)	2015-2025 (b)	1.79%	0.01%-4.625%	0.04%-4.625%	225.1		224.8
Notes Payable – Nonaffiliated (c)	2016-2019	1.02%	0.925%-2.12%	0.983%-2.12%	175.5		176.7
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2025	2.14%	1.81%-6.00%	1.55%-6.00%	216.8		111.8
Total Long-term Debt Outstanding					$	2,000.0	$	2,019.6
OPCo
Senior Unsecured Notes	2016-2035	5.98%	5.375%-6.60%	5.375%-6.60%	$	1,938.9	$	1,937.3
Pollution Control Bonds (a)	2015-2038 (b)	5.80%	5.80%	3.125%-5.80%	32.2		118.2
Securitization Bonds	2018-2020	1.56%	0.958%-2.049%	0.958%-2.049%	185.3		229.9
Other Long-term Debt	2028	1.15%	1.15%	1.15%	1.3		1.4
Total Long-term Debt Outstanding					$	2,157.7	$	2,286.8
PSO
Senior Unsecured Notes	2016-2045	5.11%	3.17%-6.625%	4.40%-6.625%	$	1,142.7	$	893.0
Pollution Control Bonds (a)	2020	4.45%	4.45%	4.45%	12.6		12.6
Other Long-term Debt	2016-2027	1.80%	1.587%-3.00%	1.482%-3.00%	130.8		131.1
Total Long-term Debt Outstanding					$	1,286.1	$	1,036.7
SWEPCo
Senior Unsecured Notes	2015-2045	5.28%	3.55%-6.45%	3.55%-6.45%	$	1,961.0	$	1,816.9
Pollution Control Bonds (a)	2015-2019 (b)	3.62%	1.60%-4.95%	3.25%-4.95%	134.5		134.4
Notes Payable – Nonaffiliated (c)	2024-2032	5.15%	4.58%-6.37%	4.58%-6.37%	78.6		81.9
Other Long-term Debt	2017	1.82%	1.82%	1.73%	99.4		99.2
Total Long-term Debt Outstanding					$	2,273.5	$	2,132.4

(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) 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) Amount excludes $83 million of Long-term Debt classified as Liabilities from Discontinued Operations on the balance sheet. See “AEPRO (Corporate and Other)” section of Note 7 for additional information.

(e) 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

	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
2016	$	1,831.8		$	318.0		$	162.9		$	395.9		$	275.4		$	3.3
2017	2,689.6			273.5			68.5			46.4			0.5			353.3
2018	1,726.9			124.0			318.0			397.0			0.5			384.9
2019	1,813.2			180.4			484.1			48.0			250.5			456.7
2020	368.2			24.9			1.8			0.1			13.1			3.3
After 2020	11,262.4			3,045.0			975.1			1,283.1			753.5			1,087.4
Principal Amount	19,692.1			3,965.8			2,010.4			2,170.5			1,293.5			2,288.9
Unamortized Discount, Net and Debt Issuance Costs	(119.4		)	(35.1		)	(10.4		)	(12.8		)	(7.4		)	(15.4		)
Total Long-term Debt Outstanding	$	19,572.7		$	3,930.7		$	2,000.0		$	2,157.7		$	1,286.1		$	2,273.5

Lines of Credit and Short-term Debt

	December 31,
	2015				2014
Type of Debt	Outstanding Amount		Interest Rate (a)		Outstanding Amount		Interest Rate (a)
	(in millions)				(in millions)
Securitized Debt for Receivables (b)	$	675.0	0.30	%	$	744.0	0.22	%
Commercial Paper	125.0		0.81	%	602.0		0.59	%
Total Short-term Debt	$	800.0			$	1,346.0

(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,
	2015			2014			2013
	(dollars in millions)
Effective Interest Rates on Securitization of Accounts Receivable	0.30		%	0.22		%	0.23		%
Net Uncollectible Accounts Receivable Written Off	$	34.1		$	40.1		$	34.9

Customer Accounts Receivable Managed Portfolio

	December 31,
	2015		2014
	(in millions)
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	$	924.8	$	974.5
Total Principal Outstanding	675.0		744.0
Delinquent Securitized Accounts Receivable	48.3		43.9
Bad Debt Reserves Related to Securitization/Sale of Accounts Receivable	17.5		12.9
Unbilled Receivables Related to Securitization/Sale of Accounts Receivable	357.8		335.4

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	2015	2015	2014	2015		2014
AEP					(in millions)
Senior Unsecured Notes	2015-2045	5.09%	1.65%-8.13%	1.65%-8.13%	$	13,629.1	$	12,562.1
Pollution Control Bonds (a)	2015-2038 (b)	2.71%	0.01%-6.30%	0.04%-6.30%	1,784.8		1,951.8
Notes Payable – Nonaffiliated (c)	2016-2032	2.47%	0.925%-6.60%	0.983%-8.03%	264.7		274.1		(d)
Securitization Bonds	2015-2031	3.66%	0.88%-6.25%	0.88%-6.25%	2,024.0		2,360.9
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2059	1.62%	1.15%-13.718%	1.15%-13.718%	1,604.5		1,098.0
Total Long-term Debt Outstanding					$	19,572.7	$	18,512.4	(d)
APCo
Senior Unsecured Notes	2015-2045	5.39%	3.40%-7.00%	3.40%-7.95%	$	2,970.4	$	2,976.1
Pollution Control Bonds (a)	2015-2038 (b)	1.70%	0.01%-5.375%	0.04%-5.375%	616.5		530.6
Notes Payable – Affiliated	2015			3.125%	—		86.0
Securitization Bonds	2024-2031	2.85%	2.008%-3.772%	2.008%-3.772%	341.5		363.7
Other Long-term Debt	2026	13.718%	13.718%	13.718%	2.3		2.3
Total Long-term Debt Outstanding					$	3,930.7	$	3,958.7
I&M
Senior Unsecured Notes	2015-2037	5.82%	3.20%-7.00%	3.20%-7.00%	$	1,117.0	$	1,240.8
Pollution Control Bonds (a)	2015-2025 (b)	1.79%	0.01%-4.625%	0.04%-4.625%	225.1		224.8
Notes Payable – Nonaffiliated (c)	2016-2019	1.02%	0.925%-2.12%	0.983%-2.12%	175.5		176.7
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2025	2.14%	1.81%-6.00%	1.55%-6.00%	216.8		111.8
Total Long-term Debt Outstanding					$	2,000.0	$	2,019.6
OPCo
Senior Unsecured Notes	2016-2035	5.98%	5.375%-6.60%	5.375%-6.60%	$	1,938.9	$	1,937.3
Pollution Control Bonds (a)	2015-2038 (b)	5.80%	5.80%	3.125%-5.80%	32.2		118.2
Securitization Bonds	2018-2020	1.56%	0.958%-2.049%	0.958%-2.049%	185.3		229.9
Other Long-term Debt	2028	1.15%	1.15%	1.15%	1.3		1.4
Total Long-term Debt Outstanding					$	2,157.7	$	2,286.8
PSO
Senior Unsecured Notes	2016-2045	5.11%	3.17%-6.625%	4.40%-6.625%	$	1,142.7	$	893.0
Pollution Control Bonds (a)	2020	4.45%	4.45%	4.45%	12.6		12.6
Other Long-term Debt	2016-2027	1.80%	1.587%-3.00%	1.482%-3.00%	130.8		131.1
Total Long-term Debt Outstanding					$	1,286.1	$	1,036.7
SWEPCo
Senior Unsecured Notes	2015-2045	5.28%	3.55%-6.45%	3.55%-6.45%	$	1,961.0	$	1,816.9
Pollution Control Bonds (a)	2015-2019 (b)	3.62%	1.60%-4.95%	3.25%-4.95%	134.5		134.4
Notes Payable – Nonaffiliated (c)	2024-2032	5.15%	4.58%-6.37%	4.58%-6.37%	78.6		81.9
Other Long-term Debt	2017	1.82%	1.82%	1.73%	99.4		99.2
Total Long-term Debt Outstanding					$	2,273.5	$	2,132.4

(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) 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) Amount excludes $83 million of Long-term Debt classified as Liabilities from Discontinued Operations on the balance sheet. See “AEPRO (Corporate and Other)” section of Note 7 for additional information.

(e) 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

	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
2016	$	1,831.8		$	318.0		$	162.9		$	395.9		$	275.4		$	3.3
2017	2,689.6			273.5			68.5			46.4			0.5			353.3
2018	1,726.9			124.0			318.0			397.0			0.5			384.9
2019	1,813.2			180.4			484.1			48.0			250.5			456.7
2020	368.2			24.9			1.8			0.1			13.1			3.3
After 2020	11,262.4			3,045.0			975.1			1,283.1			753.5			1,087.4
Principal Amount	19,692.1			3,965.8			2,010.4			2,170.5			1,293.5			2,288.9
Unamortized Discount, Net and Debt Issuance Costs	(119.4		)	(35.1		)	(10.4		)	(12.8		)	(7.4		)	(15.4		)
Total Long-term Debt Outstanding	$	19,572.7		$	3,930.7		$	2,000.0		$	2,157.7		$	1,286.1		$	2,273.5

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

Year Ended December 31, 2015:

	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, 2015			Limit
	(in millions)
APCo	$	211.2	$	694.8	$	82.0	$	79.0	$	(155.4	)	$	600.0
I&M	297.3		13.5		152.6		13.5		(282.6		)	500.0
OPCo	—		367.5		—		266.6		331.1			400.0
PSO	165.9		152.5		113.1		86.8		80.6			300.0
SWEPCo	112.5		299.9		48.1		103.4		(58.3		)	350.0

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 millions)
APCo	$	44.2	$	542.2	$	12.6	$	104.5	$	48.5		$	600.0
I&M	150.7		158.9		73.2		39.1		(129.0		)	500.0
OPCo	120.3		405.4		34.8		107.3		312.5			400.0
PSO	177.0		—		93.7		—		(154.2		)	300.0
SWEPCo	153.5		51.3		71.0		24.4		41.0			350.0

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

	Years Ended December 31,
	2015		2014		2013
Maximum Interest Rate	0.87	%	0.59	%	0.43	%
Minimum Interest Rate	0.37	%	0.24	%	0.24	%

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	2015		2014		2013		2015		2014		2013
APCo	0.53	%	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%
I&M	0.49	%	0.31	%	0.36	%	0.48	%	0.30	%	0.32	%
OPCo	—	%	0.27	%	0.33	%	0.48	%	0.34	%	0.32	%
PSO	0.49	%	0.29	%	0.34	%	0.48	%	—	%	0.33	%
SWEPCo	0.53	%	0.29	%	0.34	%	0.48	%	0.32	%	0.36	%

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.2	$	—	$	0.4
I&M	0.8		0.1		0.1
OPCo	—		—		0.5
PSO	0.1		0.3		—
SWEPCo	0.1		0.2		—

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.4	$	0.3	$	0.1
I&M	0.1		0.1		0.9
OPCo	1.3		0.2		0.2
PSO	0.4		—		0.1
SWEPCo	0.4		—		0.1

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2015		2014
	(in millions)
APCo	$	135.4	$	159.8
I&M	134.8		137.5
OPCo	351.4		365.8
PSO	116.1		112.9
SWEPCo	151.8		148.7

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	7.6	$	8.9	$	6.5
I&M	8.4		7.9		6.5
OPCo	30.7		28.8		21.6
PSO	5.8		5.9		5.6
SWEPCo	7.0		6.8		5.9

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	1,453.8	$	1,519.3	$	1,443.0
I&M	1,553.0		1,488.6		1,458.8
OPCo	2,569.4		2,647.6		2,620.5
PSO	1,326.1		1,321.1		1,232.4
SWEPCo	1,597.8		1,655.8		1,533.8

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	2015	2015	2014	2015		2014
AEP					(in millions)
Senior Unsecured Notes	2015-2045	5.09%	1.65%-8.13%	1.65%-8.13%	$	13,629.1	$	12,562.1
Pollution Control Bonds (a)	2015-2038 (b)	2.71%	0.01%-6.30%	0.04%-6.30%	1,784.8		1,951.8
Notes Payable – Nonaffiliated (c)	2016-2032	2.47%	0.925%-6.60%	0.983%-8.03%	264.7		274.1		(d)
Securitization Bonds	2015-2031	3.66%	0.88%-6.25%	0.88%-6.25%	2,024.0		2,360.9
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2059	1.62%	1.15%-13.718%	1.15%-13.718%	1,604.5		1,098.0
Total Long-term Debt Outstanding					$	19,572.7	$	18,512.4	(d)
APCo
Senior Unsecured Notes	2015-2045	5.39%	3.40%-7.00%	3.40%-7.95%	$	2,970.4	$	2,976.1
Pollution Control Bonds (a)	2015-2038 (b)	1.70%	0.01%-5.375%	0.04%-5.375%	616.5		530.6
Notes Payable – Affiliated	2015			3.125%	—		86.0
Securitization Bonds	2024-2031	2.85%	2.008%-3.772%	2.008%-3.772%	341.5		363.7
Other Long-term Debt	2026	13.718%	13.718%	13.718%	2.3		2.3
Total Long-term Debt Outstanding					$	3,930.7	$	3,958.7
I&M
Senior Unsecured Notes	2015-2037	5.82%	3.20%-7.00%	3.20%-7.00%	$	1,117.0	$	1,240.8
Pollution Control Bonds (a)	2015-2025 (b)	1.79%	0.01%-4.625%	0.04%-4.625%	225.1		224.8
Notes Payable – Nonaffiliated (c)	2016-2019	1.02%	0.925%-2.12%	0.983%-2.12%	175.5		176.7
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2025	2.14%	1.81%-6.00%	1.55%-6.00%	216.8		111.8
Total Long-term Debt Outstanding					$	2,000.0	$	2,019.6
OPCo
Senior Unsecured Notes	2016-2035	5.98%	5.375%-6.60%	5.375%-6.60%	$	1,938.9	$	1,937.3
Pollution Control Bonds (a)	2015-2038 (b)	5.80%	5.80%	3.125%-5.80%	32.2		118.2
Securitization Bonds	2018-2020	1.56%	0.958%-2.049%	0.958%-2.049%	185.3		229.9
Other Long-term Debt	2028	1.15%	1.15%	1.15%	1.3		1.4
Total Long-term Debt Outstanding					$	2,157.7	$	2,286.8
PSO
Senior Unsecured Notes	2016-2045	5.11%	3.17%-6.625%	4.40%-6.625%	$	1,142.7	$	893.0
Pollution Control Bonds (a)	2020	4.45%	4.45%	4.45%	12.6		12.6
Other Long-term Debt	2016-2027	1.80%	1.587%-3.00%	1.482%-3.00%	130.8		131.1
Total Long-term Debt Outstanding					$	1,286.1	$	1,036.7
SWEPCo
Senior Unsecured Notes	2015-2045	5.28%	3.55%-6.45%	3.55%-6.45%	$	1,961.0	$	1,816.9
Pollution Control Bonds (a)	2015-2019 (b)	3.62%	1.60%-4.95%	3.25%-4.95%	134.5		134.4
Notes Payable – Nonaffiliated (c)	2024-2032	5.15%	4.58%-6.37%	4.58%-6.37%	78.6		81.9
Other Long-term Debt	2017	1.82%	1.82%	1.73%	99.4		99.2
Total Long-term Debt Outstanding					$	2,273.5	$	2,132.4

(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) 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) Amount excludes $83 million of Long-term Debt classified as Liabilities from Discontinued Operations on the balance sheet. See “AEPRO (Corporate and Other)” section of Note 7 for additional information.

(e) 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

	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
2016	$	1,831.8		$	318.0		$	162.9		$	395.9		$	275.4		$	3.3
2017	2,689.6			273.5			68.5			46.4			0.5			353.3
2018	1,726.9			124.0			318.0			397.0			0.5			384.9
2019	1,813.2			180.4			484.1			48.0			250.5			456.7
2020	368.2			24.9			1.8			0.1			13.1			3.3
After 2020	11,262.4			3,045.0			975.1			1,283.1			753.5			1,087.4
Principal Amount	19,692.1			3,965.8			2,010.4			2,170.5			1,293.5			2,288.9
Unamortized Discount, Net and Debt Issuance Costs	(119.4		)	(35.1		)	(10.4		)	(12.8		)	(7.4		)	(15.4		)
Total Long-term Debt Outstanding	$	19,572.7		$	3,930.7		$	2,000.0		$	2,157.7		$	1,286.1		$	2,273.5

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

Year Ended December 31, 2015:

	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, 2015			Limit
	(in millions)
APCo	$	211.2	$	694.8	$	82.0	$	79.0	$	(155.4	)	$	600.0
I&M	297.3		13.5		152.6		13.5		(282.6		)	500.0
OPCo	—		367.5		—		266.6		331.1			400.0
PSO	165.9		152.5		113.1		86.8		80.6			300.0
SWEPCo	112.5		299.9		48.1		103.4		(58.3		)	350.0

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 millions)
APCo	$	44.2	$	542.2	$	12.6	$	104.5	$	48.5		$	600.0
I&M	150.7		158.9		73.2		39.1		(129.0		)	500.0
OPCo	120.3		405.4		34.8		107.3		312.5			400.0
PSO	177.0		—		93.7		—		(154.2		)	300.0
SWEPCo	153.5		51.3		71.0		24.4		41.0			350.0

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

	Years Ended December 31,
	2015		2014		2013
Maximum Interest Rate	0.87	%	0.59	%	0.43	%
Minimum Interest Rate	0.37	%	0.24	%	0.24	%

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	2015		2014		2013		2015		2014		2013
APCo	0.53	%	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%
I&M	0.49	%	0.31	%	0.36	%	0.48	%	0.30	%	0.32	%
OPCo	—	%	0.27	%	0.33	%	0.48	%	0.34	%	0.32	%
PSO	0.49	%	0.29	%	0.34	%	0.48	%	—	%	0.33	%
SWEPCo	0.53	%	0.29	%	0.34	%	0.48	%	0.32	%	0.36	%

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.2	$	—	$	0.4
I&M	0.8		0.1		0.1
OPCo	—		—		0.5
PSO	0.1		0.3		—
SWEPCo	0.1		0.2		—

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.4	$	0.3	$	0.1
I&M	0.1		0.1		0.9
OPCo	1.3		0.2		0.2
PSO	0.4		—		0.1
SWEPCo	0.4		—		0.1

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2015		2014
	(in millions)
APCo	$	135.4	$	159.8
I&M	134.8		137.5
OPCo	351.4		365.8
PSO	116.1		112.9
SWEPCo	151.8		148.7

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	7.6	$	8.9	$	6.5
I&M	8.4		7.9		6.5
OPCo	30.7		28.8		21.6
PSO	5.8		5.9		5.6
SWEPCo	7.0		6.8		5.9

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	1,453.8	$	1,519.3	$	1,443.0
I&M	1,553.0		1,488.6		1,458.8
OPCo	2,569.4		2,647.6		2,620.5
PSO	1,326.1		1,321.1		1,232.4
SWEPCo	1,597.8		1,655.8		1,533.8

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	2015	2015	2014	2015		2014
AEP					(in millions)
Senior Unsecured Notes	2015-2045	5.09%	1.65%-8.13%	1.65%-8.13%	$	13,629.1	$	12,562.1
Pollution Control Bonds (a)	2015-2038 (b)	2.71%	0.01%-6.30%	0.04%-6.30%	1,784.8		1,951.8
Notes Payable – Nonaffiliated (c)	2016-2032	2.47%	0.925%-6.60%	0.983%-8.03%	264.7		274.1		(d)
Securitization Bonds	2015-2031	3.66%	0.88%-6.25%	0.88%-6.25%	2,024.0		2,360.9
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2059	1.62%	1.15%-13.718%	1.15%-13.718%	1,604.5		1,098.0
Total Long-term Debt Outstanding					$	19,572.7	$	18,512.4	(d)
APCo
Senior Unsecured Notes	2015-2045	5.39%	3.40%-7.00%	3.40%-7.95%	$	2,970.4	$	2,976.1
Pollution Control Bonds (a)	2015-2038 (b)	1.70%	0.01%-5.375%	0.04%-5.375%	616.5		530.6
Notes Payable – Affiliated	2015			3.125%	—		86.0
Securitization Bonds	2024-2031	2.85%	2.008%-3.772%	2.008%-3.772%	341.5		363.7
Other Long-term Debt	2026	13.718%	13.718%	13.718%	2.3		2.3
Total Long-term Debt Outstanding					$	3,930.7	$	3,958.7
I&M
Senior Unsecured Notes	2015-2037	5.82%	3.20%-7.00%	3.20%-7.00%	$	1,117.0	$	1,240.8
Pollution Control Bonds (a)	2015-2025 (b)	1.79%	0.01%-4.625%	0.04%-4.625%	225.1		224.8
Notes Payable – Nonaffiliated (c)	2016-2019	1.02%	0.925%-2.12%	0.983%-2.12%	175.5		176.7
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2025	2.14%	1.81%-6.00%	1.55%-6.00%	216.8		111.8
Total Long-term Debt Outstanding					$	2,000.0	$	2,019.6
OPCo
Senior Unsecured Notes	2016-2035	5.98%	5.375%-6.60%	5.375%-6.60%	$	1,938.9	$	1,937.3
Pollution Control Bonds (a)	2015-2038 (b)	5.80%	5.80%	3.125%-5.80%	32.2		118.2
Securitization Bonds	2018-2020	1.56%	0.958%-2.049%	0.958%-2.049%	185.3		229.9
Other Long-term Debt	2028	1.15%	1.15%	1.15%	1.3		1.4
Total Long-term Debt Outstanding					$	2,157.7	$	2,286.8
PSO
Senior Unsecured Notes	2016-2045	5.11%	3.17%-6.625%	4.40%-6.625%	$	1,142.7	$	893.0
Pollution Control Bonds (a)	2020	4.45%	4.45%	4.45%	12.6		12.6
Other Long-term Debt	2016-2027	1.80%	1.587%-3.00%	1.482%-3.00%	130.8		131.1
Total Long-term Debt Outstanding					$	1,286.1	$	1,036.7
SWEPCo
Senior Unsecured Notes	2015-2045	5.28%	3.55%-6.45%	3.55%-6.45%	$	1,961.0	$	1,816.9
Pollution Control Bonds (a)	2015-2019 (b)	3.62%	1.60%-4.95%	3.25%-4.95%	134.5		134.4
Notes Payable – Nonaffiliated (c)	2024-2032	5.15%	4.58%-6.37%	4.58%-6.37%	78.6		81.9
Other Long-term Debt	2017	1.82%	1.82%	1.73%	99.4		99.2
Total Long-term Debt Outstanding					$	2,273.5	$	2,132.4

(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) 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) Amount excludes $83 million of Long-term Debt classified as Liabilities from Discontinued Operations on the balance sheet. See “AEPRO (Corporate and Other)” section of Note 7 for additional information.

(e) 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

	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
2016	$	1,831.8		$	318.0		$	162.9		$	395.9		$	275.4		$	3.3
2017	2,689.6			273.5			68.5			46.4			0.5			353.3
2018	1,726.9			124.0			318.0			397.0			0.5			384.9
2019	1,813.2			180.4			484.1			48.0			250.5			456.7
2020	368.2			24.9			1.8			0.1			13.1			3.3
After 2020	11,262.4			3,045.0			975.1			1,283.1			753.5			1,087.4
Principal Amount	19,692.1			3,965.8			2,010.4			2,170.5			1,293.5			2,288.9
Unamortized Discount, Net and Debt Issuance Costs	(119.4		)	(35.1		)	(10.4		)	(12.8		)	(7.4		)	(15.4		)
Total Long-term Debt Outstanding	$	19,572.7		$	3,930.7		$	2,000.0		$	2,157.7		$	1,286.1		$	2,273.5

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

Year Ended December 31, 2015:

	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, 2015			Limit
	(in millions)
APCo	$	211.2	$	694.8	$	82.0	$	79.0	$	(155.4	)	$	600.0
I&M	297.3		13.5		152.6		13.5		(282.6		)	500.0
OPCo	—		367.5		—		266.6		331.1			400.0
PSO	165.9		152.5		113.1		86.8		80.6			300.0
SWEPCo	112.5		299.9		48.1		103.4		(58.3		)	350.0

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 millions)
APCo	$	44.2	$	542.2	$	12.6	$	104.5	$	48.5		$	600.0
I&M	150.7		158.9		73.2		39.1		(129.0		)	500.0
OPCo	120.3		405.4		34.8		107.3		312.5			400.0
PSO	177.0		—		93.7		—		(154.2		)	300.0
SWEPCo	153.5		51.3		71.0		24.4		41.0			350.0

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

	Years Ended December 31,
	2015		2014		2013
Maximum Interest Rate	0.87	%	0.59	%	0.43	%
Minimum Interest Rate	0.37	%	0.24	%	0.24	%

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	2015		2014		2013		2015		2014		2013
APCo	0.53	%	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%
I&M	0.49	%	0.31	%	0.36	%	0.48	%	0.30	%	0.32	%
OPCo	—	%	0.27	%	0.33	%	0.48	%	0.34	%	0.32	%
PSO	0.49	%	0.29	%	0.34	%	0.48	%	—	%	0.33	%
SWEPCo	0.53	%	0.29	%	0.34	%	0.48	%	0.32	%	0.36	%

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.2	$	—	$	0.4
I&M	0.8		0.1		0.1
OPCo	—		—		0.5
PSO	0.1		0.3		—
SWEPCo	0.1		0.2		—

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.4	$	0.3	$	0.1
I&M	0.1		0.1		0.9
OPCo	1.3		0.2		0.2
PSO	0.4		—		0.1
SWEPCo	0.4		—		0.1

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2015		2014
	(in millions)
APCo	$	135.4	$	159.8
I&M	134.8		137.5
OPCo	351.4		365.8
PSO	116.1		112.9
SWEPCo	151.8		148.7

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	7.6	$	8.9	$	6.5
I&M	8.4		7.9		6.5
OPCo	30.7		28.8		21.6
PSO	5.8		5.9		5.6
SWEPCo	7.0		6.8		5.9

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	1,453.8	$	1,519.3	$	1,443.0
I&M	1,553.0		1,488.6		1,458.8
OPCo	2,569.4		2,647.6		2,620.5
PSO	1,326.1		1,321.1		1,232.4
SWEPCo	1,597.8		1,655.8		1,533.8

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	2015	2015	2014	2015		2014
AEP					(in millions)
Senior Unsecured Notes	2015-2045	5.09%	1.65%-8.13%	1.65%-8.13%	$	13,629.1	$	12,562.1
Pollution Control Bonds (a)	2015-2038 (b)	2.71%	0.01%-6.30%	0.04%-6.30%	1,784.8		1,951.8
Notes Payable – Nonaffiliated (c)	2016-2032	2.47%	0.925%-6.60%	0.983%-8.03%	264.7		274.1		(d)
Securitization Bonds	2015-2031	3.66%	0.88%-6.25%	0.88%-6.25%	2,024.0		2,360.9
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2059	1.62%	1.15%-13.718%	1.15%-13.718%	1,604.5		1,098.0
Total Long-term Debt Outstanding					$	19,572.7	$	18,512.4	(d)
APCo
Senior Unsecured Notes	2015-2045	5.39%	3.40%-7.00%	3.40%-7.95%	$	2,970.4	$	2,976.1
Pollution Control Bonds (a)	2015-2038 (b)	1.70%	0.01%-5.375%	0.04%-5.375%	616.5		530.6
Notes Payable – Affiliated	2015			3.125%	—		86.0
Securitization Bonds	2024-2031	2.85%	2.008%-3.772%	2.008%-3.772%	341.5		363.7
Other Long-term Debt	2026	13.718%	13.718%	13.718%	2.3		2.3
Total Long-term Debt Outstanding					$	3,930.7	$	3,958.7
I&M
Senior Unsecured Notes	2015-2037	5.82%	3.20%-7.00%	3.20%-7.00%	$	1,117.0	$	1,240.8
Pollution Control Bonds (a)	2015-2025 (b)	1.79%	0.01%-4.625%	0.04%-4.625%	225.1		224.8
Notes Payable – Nonaffiliated (c)	2016-2019	1.02%	0.925%-2.12%	0.983%-2.12%	175.5		176.7
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2025	2.14%	1.81%-6.00%	1.55%-6.00%	216.8		111.8
Total Long-term Debt Outstanding					$	2,000.0	$	2,019.6
OPCo
Senior Unsecured Notes	2016-2035	5.98%	5.375%-6.60%	5.375%-6.60%	$	1,938.9	$	1,937.3
Pollution Control Bonds (a)	2015-2038 (b)	5.80%	5.80%	3.125%-5.80%	32.2		118.2
Securitization Bonds	2018-2020	1.56%	0.958%-2.049%	0.958%-2.049%	185.3		229.9
Other Long-term Debt	2028	1.15%	1.15%	1.15%	1.3		1.4
Total Long-term Debt Outstanding					$	2,157.7	$	2,286.8
PSO
Senior Unsecured Notes	2016-2045	5.11%	3.17%-6.625%	4.40%-6.625%	$	1,142.7	$	893.0
Pollution Control Bonds (a)	2020	4.45%	4.45%	4.45%	12.6		12.6
Other Long-term Debt	2016-2027	1.80%	1.587%-3.00%	1.482%-3.00%	130.8		131.1
Total Long-term Debt Outstanding					$	1,286.1	$	1,036.7
SWEPCo
Senior Unsecured Notes	2015-2045	5.28%	3.55%-6.45%	3.55%-6.45%	$	1,961.0	$	1,816.9
Pollution Control Bonds (a)	2015-2019 (b)	3.62%	1.60%-4.95%	3.25%-4.95%	134.5		134.4
Notes Payable – Nonaffiliated (c)	2024-2032	5.15%	4.58%-6.37%	4.58%-6.37%	78.6		81.9
Other Long-term Debt	2017	1.82%	1.82%	1.73%	99.4		99.2
Total Long-term Debt Outstanding					$	2,273.5	$	2,132.4

(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) 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) Amount excludes $83 million of Long-term Debt classified as Liabilities from Discontinued Operations on the balance sheet. See “AEPRO (Corporate and Other)” section of Note 7 for additional information.

(e) 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

	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
2016	$	1,831.8		$	318.0		$	162.9		$	395.9		$	275.4		$	3.3
2017	2,689.6			273.5			68.5			46.4			0.5			353.3
2018	1,726.9			124.0			318.0			397.0			0.5			384.9
2019	1,813.2			180.4			484.1			48.0			250.5			456.7
2020	368.2			24.9			1.8			0.1			13.1			3.3
After 2020	11,262.4			3,045.0			975.1			1,283.1			753.5			1,087.4
Principal Amount	19,692.1			3,965.8			2,010.4			2,170.5			1,293.5			2,288.9
Unamortized Discount, Net and Debt Issuance Costs	(119.4		)	(35.1		)	(10.4		)	(12.8		)	(7.4		)	(15.4		)
Total Long-term Debt Outstanding	$	19,572.7		$	3,930.7		$	2,000.0		$	2,157.7		$	1,286.1		$	2,273.5

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

Year Ended December 31, 2015:

	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, 2015			Limit
	(in millions)
APCo	$	211.2	$	694.8	$	82.0	$	79.0	$	(155.4	)	$	600.0
I&M	297.3		13.5		152.6		13.5		(282.6		)	500.0
OPCo	—		367.5		—		266.6		331.1			400.0
PSO	165.9		152.5		113.1		86.8		80.6			300.0
SWEPCo	112.5		299.9		48.1		103.4		(58.3		)	350.0

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 millions)
APCo	$	44.2	$	542.2	$	12.6	$	104.5	$	48.5		$	600.0
I&M	150.7		158.9		73.2		39.1		(129.0		)	500.0
OPCo	120.3		405.4		34.8		107.3		312.5			400.0
PSO	177.0		—		93.7		—		(154.2		)	300.0
SWEPCo	153.5		51.3		71.0		24.4		41.0			350.0

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

	Years Ended December 31,
	2015		2014		2013
Maximum Interest Rate	0.87	%	0.59	%	0.43	%
Minimum Interest Rate	0.37	%	0.24	%	0.24	%

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	2015		2014		2013		2015		2014		2013
APCo	0.53	%	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%
I&M	0.49	%	0.31	%	0.36	%	0.48	%	0.30	%	0.32	%
OPCo	—	%	0.27	%	0.33	%	0.48	%	0.34	%	0.32	%
PSO	0.49	%	0.29	%	0.34	%	0.48	%	—	%	0.33	%
SWEPCo	0.53	%	0.29	%	0.34	%	0.48	%	0.32	%	0.36	%

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.2	$	—	$	0.4
I&M	0.8		0.1		0.1
OPCo	—		—		0.5
PSO	0.1		0.3		—
SWEPCo	0.1		0.2		—

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.4	$	0.3	$	0.1
I&M	0.1		0.1		0.9
OPCo	1.3		0.2		0.2
PSO	0.4		—		0.1
SWEPCo	0.4		—		0.1

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2015		2014
	(in millions)
APCo	$	135.4	$	159.8
I&M	134.8		137.5
OPCo	351.4		365.8
PSO	116.1		112.9
SWEPCo	151.8		148.7

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	7.6	$	8.9	$	6.5
I&M	8.4		7.9		6.5
OPCo	30.7		28.8		21.6
PSO	5.8		5.9		5.6
SWEPCo	7.0		6.8		5.9

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	1,453.8	$	1,519.3	$	1,443.0
I&M	1,553.0		1,488.6		1,458.8
OPCo	2,569.4		2,647.6		2,620.5
PSO	1,326.1		1,321.1		1,232.4
SWEPCo	1,597.8		1,655.8		1,533.8

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	2015	2015	2014	2015		2014
AEP					(in millions)
Senior Unsecured Notes	2015-2045	5.09%	1.65%-8.13%	1.65%-8.13%	$	13,629.1	$	12,562.1
Pollution Control Bonds (a)	2015-2038 (b)	2.71%	0.01%-6.30%	0.04%-6.30%	1,784.8		1,951.8
Notes Payable – Nonaffiliated (c)	2016-2032	2.47%	0.925%-6.60%	0.983%-8.03%	264.7		274.1		(d)
Securitization Bonds	2015-2031	3.66%	0.88%-6.25%	0.88%-6.25%	2,024.0		2,360.9
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2059	1.62%	1.15%-13.718%	1.15%-13.718%	1,604.5		1,098.0
Total Long-term Debt Outstanding					$	19,572.7	$	18,512.4	(d)
APCo
Senior Unsecured Notes	2015-2045	5.39%	3.40%-7.00%	3.40%-7.95%	$	2,970.4	$	2,976.1
Pollution Control Bonds (a)	2015-2038 (b)	1.70%	0.01%-5.375%	0.04%-5.375%	616.5		530.6
Notes Payable – Affiliated	2015			3.125%	—		86.0
Securitization Bonds	2024-2031	2.85%	2.008%-3.772%	2.008%-3.772%	341.5		363.7
Other Long-term Debt	2026	13.718%	13.718%	13.718%	2.3		2.3
Total Long-term Debt Outstanding					$	3,930.7	$	3,958.7
I&M
Senior Unsecured Notes	2015-2037	5.82%	3.20%-7.00%	3.20%-7.00%	$	1,117.0	$	1,240.8
Pollution Control Bonds (a)	2015-2025 (b)	1.79%	0.01%-4.625%	0.04%-4.625%	225.1		224.8
Notes Payable – Nonaffiliated (c)	2016-2019	1.02%	0.925%-2.12%	0.983%-2.12%	175.5		176.7
Spent Nuclear Fuel Obligation (e)					265.6		265.5
Other Long-term Debt	2015-2025	2.14%	1.81%-6.00%	1.55%-6.00%	216.8		111.8
Total Long-term Debt Outstanding					$	2,000.0	$	2,019.6
OPCo
Senior Unsecured Notes	2016-2035	5.98%	5.375%-6.60%	5.375%-6.60%	$	1,938.9	$	1,937.3
Pollution Control Bonds (a)	2015-2038 (b)	5.80%	5.80%	3.125%-5.80%	32.2		118.2
Securitization Bonds	2018-2020	1.56%	0.958%-2.049%	0.958%-2.049%	185.3		229.9
Other Long-term Debt	2028	1.15%	1.15%	1.15%	1.3		1.4
Total Long-term Debt Outstanding					$	2,157.7	$	2,286.8
PSO
Senior Unsecured Notes	2016-2045	5.11%	3.17%-6.625%	4.40%-6.625%	$	1,142.7	$	893.0
Pollution Control Bonds (a)	2020	4.45%	4.45%	4.45%	12.6		12.6
Other Long-term Debt	2016-2027	1.80%	1.587%-3.00%	1.482%-3.00%	130.8		131.1
Total Long-term Debt Outstanding					$	1,286.1	$	1,036.7
SWEPCo
Senior Unsecured Notes	2015-2045	5.28%	3.55%-6.45%	3.55%-6.45%	$	1,961.0	$	1,816.9
Pollution Control Bonds (a)	2015-2019 (b)	3.62%	1.60%-4.95%	3.25%-4.95%	134.5		134.4
Notes Payable – Nonaffiliated (c)	2024-2032	5.15%	4.58%-6.37%	4.58%-6.37%	78.6		81.9
Other Long-term Debt	2017	1.82%	1.82%	1.73%	99.4		99.2
Total Long-term Debt Outstanding					$	2,273.5	$	2,132.4

(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) 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) Amount excludes $83 million of Long-term Debt classified as Liabilities from Discontinued Operations on the balance sheet. See “AEPRO (Corporate and Other)” section of Note 7 for additional information.

(e) 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

	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
2016	$	1,831.8		$	318.0		$	162.9		$	395.9		$	275.4		$	3.3
2017	2,689.6			273.5			68.5			46.4			0.5			353.3
2018	1,726.9			124.0			318.0			397.0			0.5			384.9
2019	1,813.2			180.4			484.1			48.0			250.5			456.7
2020	368.2			24.9			1.8			0.1			13.1			3.3
After 2020	11,262.4			3,045.0			975.1			1,283.1			753.5			1,087.4
Principal Amount	19,692.1			3,965.8			2,010.4			2,170.5			1,293.5			2,288.9
Unamortized Discount, Net and Debt Issuance Costs	(119.4		)	(35.1		)	(10.4		)	(12.8		)	(7.4		)	(15.4		)
Total Long-term Debt Outstanding	$	19,572.7		$	3,930.7		$	2,000.0		$	2,157.7		$	1,286.1		$	2,273.5

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

Year Ended December 31, 2015:

	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, 2015			Limit
	(in millions)
APCo	$	211.2	$	694.8	$	82.0	$	79.0	$	(155.4	)	$	600.0
I&M	297.3		13.5		152.6		13.5		(282.6		)	500.0
OPCo	—		367.5		—		266.6		331.1			400.0
PSO	165.9		152.5		113.1		86.8		80.6			300.0
SWEPCo	112.5		299.9		48.1		103.4		(58.3		)	350.0

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 millions)
APCo	$	44.2	$	542.2	$	12.6	$	104.5	$	48.5		$	600.0
I&M	150.7		158.9		73.2		39.1		(129.0		)	500.0
OPCo	120.3		405.4		34.8		107.3		312.5			400.0
PSO	177.0		—		93.7		—		(154.2		)	300.0
SWEPCo	153.5		51.3		71.0		24.4		41.0			350.0

Nonutility Money Pool Activity

Maximum		Average		Loans
Loans		Loans		to the
to the		to the		Nonutility
Nonutility		Nonutility		Money Pool as of
Money Pool		Money Pool		December 31, 2015
(in millions)
$	2.0	$	2.0	$	2.0

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

	Years Ended December 31,
	2015		2014		2013
Maximum Interest Rate	0.87	%	0.59	%	0.43	%
Minimum Interest Rate	0.37	%	0.24	%	0.24	%

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	2015		2014		2013		2015		2014		2013
APCo	0.53	%	0.29	%	0.33	%	0.47	%	0.29	%	0.33	%
I&M	0.49	%	0.31	%	0.36	%	0.48	%	0.30	%	0.32	%
OPCo	—	%	0.27	%	0.33	%	0.48	%	0.34	%	0.32	%
PSO	0.49	%	0.29	%	0.34	%	0.48	%	—	%	0.33	%
SWEPCo	0.53	%	0.29	%	0.34	%	0.48	%	0.32	%	0.36	%

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

	Maximum		Minimum		Average
	Interest Rate		Interest Rate		Interest Rate
	for Funds		for Funds		for Funds
	Loaned to		Loaned to		Loaned to
Year Ended	the Nonutility		the Nonutility		the Nonutility
December 31,	Money Pool		Money Pool		Money Pool
2015	0.87	%	0.37	%	0.48	%

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.2	$	—	$	0.4
I&M	0.8		0.1		0.1
OPCo	—		—		0.5
PSO	0.1		0.3		—
SWEPCo	0.1		0.2		—

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

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	0.4	$	0.3	$	0.1
I&M	0.1		0.1		0.9
OPCo	1.3		0.2		0.2
PSO	0.4		—		0.1
SWEPCo	0.4		—		0.1

Accounts Receivable and Accrued Unbilled Revenues

	December 31,
Company	2015		2014
	(in millions)
APCo	$	135.4	$	159.8
I&M	134.8		137.5
OPCo	351.4		365.8
PSO	116.1		112.9
SWEPCo	151.8		148.7

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	7.6	$	8.9	$	6.5
I&M	8.4		7.9		6.5
OPCo	30.7		28.8		21.6
PSO	5.8		5.9		5.6
SWEPCo	7.0		6.8		5.9

Proceeds on Sale of Receivables to AEP Credit

	Years Ended December 31,
Company	2015		2014		2013
	(in millions)
APCo	$	1,453.8	$	1,519.3	$	1,443.0
I&M	1,553.0		1,488.6		1,458.8
OPCo	2,569.4		2,647.6		2,620.5
PSO	1,326.1		1,321.1		1,232.4
SWEPCo	1,597.8		1,655.8		1,533.8