Financing Activities (Tables)

3 Months Ended

Mar. 31, 2016

Long-term Debt

Type of Debt	March 31, 2016		December 31, 2015
	(in millions)
Senior Unsecured Notes	$	14,026.2	$	13,629.1
Pollution Control Bonds	1,784.1		1,784.8
Notes Payable	233.6		264.7
Securitization Bonds	1,863.1		2,024.0
Spent Nuclear Fuel Obligation (a)	265.7		265.6
Other Long-term Debt	1,609.9		1,604.5
Total Long-term Debt Outstanding	19,782.6		19,572.7
Long-term Debt Due Within One Year	2,033.3		1,831.8
Long-term Debt	$	17,749.3	$	17,740.9

(a) Pursuant to the Nuclear Waste Policy Act of 1982, I&M, a nuclear licensee, has an obligation to the United States Department of Energy for spent nuclear fuel disposal.  The obligation includes a one-time fee for nuclear fuel consumed prior to April 7, 1983.  Trust fund assets related to this obligation were $309 million and $309 million as of March 31, 2016 and December 31, 2015, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on the condensed balance sheets.

Long-term Debt Issuances

Company	Type of Debt	Principal Amount (a)		Interest Rate	Due Date
Issuances:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
I&M	Senior Unsecured Notes	400.0		4.55	2046
Non-Registrant:
Transource Missouri	Other Long-term Debt	5.5		Variable	2018
Total Issuances		$	530.8

(a) Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

Retirements and Principal Payments

Company	Type of Debt	Principal Amount Paid		Interest Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
APCo	Securitization Bonds	11.2		2.008	2024
I&M	Notes Payable	0.4		Variable	2016
I&M	Notes Payable	0.3		2.12	2016
I&M	Notes Payable	6.9		Variable	2017
I&M	Notes Payable	10.2		Variable	2019
I&M	Notes Payable	10.7		Variable	2019
I&M	Other Long-term Debt	0.3		6.00	2025
OPCo	Securitization Bonds	22.8		0.958	2018
PSO	Other Long-term Debt	0.1		3.00	2027
SWEPCo	Notes Payable	1.6		4.58	2032
Non-Registrant:
AEGCo	Senior Unsecured Notes	3.7		6.33	2037
AEP Subsidiaries	Notes Payable	1.0		Variable	2017
TCC	Securitization Bonds	44.2		6.25	2016
TCC	Securitization Bonds	83.7		5.17	2018
Total Retirements and Principal Payments		$	322.4

Short Term Debt

	March 31, 2016				December 31, 2015
Type of Debt	Outstanding Amount		Interest Rate (a)		Outstanding Amount		Interest Rate (a)
	(in millions)				(in millions)
Securitized Debt for Receivables (b)	$	719.0	0.58	%	$	675.0	0.30	%
Commercial Paper	502.0		0.77	%	125.0		0.81	%
Total Short-term Debt	$	1,221.0			$	800.0

(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

	Three Months Ended March 31,
	2016			2015
	(dollars in millions)
Effective Interest Rates on Securitization of Accounts Receivable	0.58		%	0.26		%
Net Uncollectible Accounts Receivable Written Off	$	5.7		$	6.6

Customer Accounts Receivable Managed Portfolio

	March 31, 2016		December 31, 2015
	(in millions)
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	$	849.8	$	924.8
Total Principal Outstanding	719.0		675.0
Delinquent Securitized Accounts Receivable	52.1		48.3
Bad Debt Reserves Related to Securitization of Accounts Receivable	20.9		17.5
Unbilled Receivables Related to Securitization of Accounts Receivable	264.0		357.8

Appalachian Power Co [Member]

Long-term Debt Issuances

Company	Type of Debt	Principal Amount (a)		Interest Rate	Due Date
Issuances:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
I&M	Senior Unsecured Notes	400.0		4.55	2046
Non-Registrant:
Transource Missouri	Other Long-term Debt	5.5		Variable	2018
Total Issuances		$	530.8

(a) Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

Retirements and Principal Payments

Company	Type of Debt	Principal Amount Paid		Interest Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
APCo	Securitization Bonds	11.2		2.008	2024
I&M	Notes Payable	0.4		Variable	2016
I&M	Notes Payable	0.3		2.12	2016
I&M	Notes Payable	6.9		Variable	2017
I&M	Notes Payable	10.2		Variable	2019
I&M	Notes Payable	10.7		Variable	2019
I&M	Other Long-term Debt	0.3		6.00	2025
OPCo	Securitization Bonds	22.8		0.958	2018
PSO	Other Long-term Debt	0.1		3.00	2027
SWEPCo	Notes Payable	1.6		4.58	2032
Non-Registrant:
AEGCo	Senior Unsecured Notes	3.7		6.33	2037
AEP Subsidiaries	Notes Payable	1.0		Variable	2017
TCC	Securitization Bonds	44.2		6.25	2016
TCC	Securitization Bonds	83.7		5.17	2018
Total Retirements and Principal Payments		$	322.4

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

Company	Maximum Borrowings from the Utility Money Pool		Maximum Loans to the Utility Money Pool		Average Borrowings from the Utility Money Pool		Average Loans to the Utility Money Pool		Net Loans to (Borrowings from) the Utility Money Pool as of March 31, 2016			Authorized Short-term Borrowing Limit
	(in millions)
APCo	$	286.9	$	25.7	$	183.2	$	25.5	$	(146.4	)	$	600.0
I&M	369.1		62.5		267.3		17.0		2.8			500.0
OPCo	—		379.2		—		304.7		221.9			400.0
PSO	—		91.0		—		48.7		8.4			300.0
SWEPCo	221.8		—		148.0		—		(217.8		)	350.0

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

	Three Months Ended March 31,
	2016		2015
Maximum Interest Rate	0.83	%	0.59	%
Minimum Interest Rate	0.69	%	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				Average Interest Rate for Funds Loaned to the Utility Money Pool for
	Three Months Ended March 31,				Three Months Ended March 31,
Company	2016		2015		2016		2015
APCo	0.73	%	—	%	0.73	%	0.45	%
I&M	0.72	%	0.46	%	0.74	%	0.46	%
OPCo	—	%	—	%	0.73	%	0.46	%
PSO	—	%	0.49	%	0.72	%	0.44	%
SWEPCo	0.73	%	0.46	%	—	%	0.52	%

Accounts Receivable and Accrued Unbilled Revenues

Company	March 31, 2016		December 31, 2015
	(in millions)
APCo	$	136.6	$	135.4
I&M	125.3		134.8
OPCo	339.0		351.4
PSO	94.5		116.1
SWEPCo	121.2		151.8

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	1.8	$	2.5
I&M	1.9		2.4
OPCo	7.9		8.0
PSO	1.4		1.4
SWEPCo	1.5		1.7

Proceeds on Sale of Receivables to AEP Credit

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	384.4	$	429.6
I&M	388.1		419.6
OPCo	646.6		715.0
PSO	272.1		302.5
SWEPCo	336.1		373.2

Indiana Michigan Power Co [Member]

Long-term Debt Issuances

Company	Type of Debt	Principal Amount (a)		Interest Rate	Due Date
Issuances:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
I&M	Senior Unsecured Notes	400.0		4.55	2046
Non-Registrant:
Transource Missouri	Other Long-term Debt	5.5		Variable	2018
Total Issuances		$	530.8

(a) Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

Retirements and Principal Payments

Company	Type of Debt	Principal Amount Paid		Interest Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
APCo	Securitization Bonds	11.2		2.008	2024
I&M	Notes Payable	0.4		Variable	2016
I&M	Notes Payable	0.3		2.12	2016
I&M	Notes Payable	6.9		Variable	2017
I&M	Notes Payable	10.2		Variable	2019
I&M	Notes Payable	10.7		Variable	2019
I&M	Other Long-term Debt	0.3		6.00	2025
OPCo	Securitization Bonds	22.8		0.958	2018
PSO	Other Long-term Debt	0.1		3.00	2027
SWEPCo	Notes Payable	1.6		4.58	2032
Non-Registrant:
AEGCo	Senior Unsecured Notes	3.7		6.33	2037
AEP Subsidiaries	Notes Payable	1.0		Variable	2017
TCC	Securitization Bonds	44.2		6.25	2016
TCC	Securitization Bonds	83.7		5.17	2018
Total Retirements and Principal Payments		$	322.4

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

Company	Maximum Borrowings from the Utility Money Pool		Maximum Loans to the Utility Money Pool		Average Borrowings from the Utility Money Pool		Average Loans to the Utility Money Pool		Net Loans to (Borrowings from) the Utility Money Pool as of March 31, 2016			Authorized Short-term Borrowing Limit
	(in millions)
APCo	$	286.9	$	25.7	$	183.2	$	25.5	$	(146.4	)	$	600.0
I&M	369.1		62.5		267.3		17.0		2.8			500.0
OPCo	—		379.2		—		304.7		221.9			400.0
PSO	—		91.0		—		48.7		8.4			300.0
SWEPCo	221.8		—		148.0		—		(217.8		)	350.0

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

	Three Months Ended March 31,
	2016		2015
Maximum Interest Rate	0.83	%	0.59	%
Minimum Interest Rate	0.69	%	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				Average Interest Rate for Funds Loaned to the Utility Money Pool for
	Three Months Ended March 31,				Three Months Ended March 31,
Company	2016		2015		2016		2015
APCo	0.73	%	—	%	0.73	%	0.45	%
I&M	0.72	%	0.46	%	0.74	%	0.46	%
OPCo	—	%	—	%	0.73	%	0.46	%
PSO	—	%	0.49	%	0.72	%	0.44	%
SWEPCo	0.73	%	0.46	%	—	%	0.52	%

Accounts Receivable and Accrued Unbilled Revenues

Company	March 31, 2016		December 31, 2015
	(in millions)
APCo	$	136.6	$	135.4
I&M	125.3		134.8
OPCo	339.0		351.4
PSO	94.5		116.1
SWEPCo	121.2		151.8

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	1.8	$	2.5
I&M	1.9		2.4
OPCo	7.9		8.0
PSO	1.4		1.4
SWEPCo	1.5		1.7

Proceeds on Sale of Receivables to AEP Credit

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	384.4	$	429.6
I&M	388.1		419.6
OPCo	646.6		715.0
PSO	272.1		302.5
SWEPCo	336.1		373.2

Ohio Power Co [Member]

Retirements and Principal Payments

Company	Type of Debt	Principal Amount Paid		Interest Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
APCo	Securitization Bonds	11.2		2.008	2024
I&M	Notes Payable	0.4		Variable	2016
I&M	Notes Payable	0.3		2.12	2016
I&M	Notes Payable	6.9		Variable	2017
I&M	Notes Payable	10.2		Variable	2019
I&M	Notes Payable	10.7		Variable	2019
I&M	Other Long-term Debt	0.3		6.00	2025
OPCo	Securitization Bonds	22.8		0.958	2018
PSO	Other Long-term Debt	0.1		3.00	2027
SWEPCo	Notes Payable	1.6		4.58	2032
Non-Registrant:
AEGCo	Senior Unsecured Notes	3.7		6.33	2037
AEP Subsidiaries	Notes Payable	1.0		Variable	2017
TCC	Securitization Bonds	44.2		6.25	2016
TCC	Securitization Bonds	83.7		5.17	2018
Total Retirements and Principal Payments		$	322.4

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

Company	Maximum Borrowings from the Utility Money Pool		Maximum Loans to the Utility Money Pool		Average Borrowings from the Utility Money Pool		Average Loans to the Utility Money Pool		Net Loans to (Borrowings from) the Utility Money Pool as of March 31, 2016			Authorized Short-term Borrowing Limit
	(in millions)
APCo	$	286.9	$	25.7	$	183.2	$	25.5	$	(146.4	)	$	600.0
I&M	369.1		62.5		267.3		17.0		2.8			500.0
OPCo	—		379.2		—		304.7		221.9			400.0
PSO	—		91.0		—		48.7		8.4			300.0
SWEPCo	221.8		—		148.0		—		(217.8		)	350.0

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

	Three Months Ended March 31,
	2016		2015
Maximum Interest Rate	0.83	%	0.59	%
Minimum Interest Rate	0.69	%	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				Average Interest Rate for Funds Loaned to the Utility Money Pool for
	Three Months Ended March 31,				Three Months Ended March 31,
Company	2016		2015		2016		2015
APCo	0.73	%	—	%	0.73	%	0.45	%
I&M	0.72	%	0.46	%	0.74	%	0.46	%
OPCo	—	%	—	%	0.73	%	0.46	%
PSO	—	%	0.49	%	0.72	%	0.44	%
SWEPCo	0.73	%	0.46	%	—	%	0.52	%

Accounts Receivable and Accrued Unbilled Revenues

Company	March 31, 2016		December 31, 2015
	(in millions)
APCo	$	136.6	$	135.4
I&M	125.3		134.8
OPCo	339.0		351.4
PSO	94.5		116.1
SWEPCo	121.2		151.8

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	1.8	$	2.5
I&M	1.9		2.4
OPCo	7.9		8.0
PSO	1.4		1.4
SWEPCo	1.5		1.7

Proceeds on Sale of Receivables to AEP Credit

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	384.4	$	429.6
I&M	388.1		419.6
OPCo	646.6		715.0
PSO	272.1		302.5
SWEPCo	336.1		373.2

Public Service Co Of Oklahoma [Member]

Retirements and Principal Payments

Company	Type of Debt	Principal Amount Paid		Interest Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
APCo	Securitization Bonds	11.2		2.008	2024
I&M	Notes Payable	0.4		Variable	2016
I&M	Notes Payable	0.3		2.12	2016
I&M	Notes Payable	6.9		Variable	2017
I&M	Notes Payable	10.2		Variable	2019
I&M	Notes Payable	10.7		Variable	2019
I&M	Other Long-term Debt	0.3		6.00	2025
OPCo	Securitization Bonds	22.8		0.958	2018
PSO	Other Long-term Debt	0.1		3.00	2027
SWEPCo	Notes Payable	1.6		4.58	2032
Non-Registrant:
AEGCo	Senior Unsecured Notes	3.7		6.33	2037
AEP Subsidiaries	Notes Payable	1.0		Variable	2017
TCC	Securitization Bonds	44.2		6.25	2016
TCC	Securitization Bonds	83.7		5.17	2018
Total Retirements and Principal Payments		$	322.4

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

Company	Maximum Borrowings from the Utility Money Pool		Maximum Loans to the Utility Money Pool		Average Borrowings from the Utility Money Pool		Average Loans to the Utility Money Pool		Net Loans to (Borrowings from) the Utility Money Pool as of March 31, 2016			Authorized Short-term Borrowing Limit
	(in millions)
APCo	$	286.9	$	25.7	$	183.2	$	25.5	$	(146.4	)	$	600.0
I&M	369.1		62.5		267.3		17.0		2.8			500.0
OPCo	—		379.2		—		304.7		221.9			400.0
PSO	—		91.0		—		48.7		8.4			300.0
SWEPCo	221.8		—		148.0		—		(217.8		)	350.0

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

	Three Months Ended March 31,
	2016		2015
Maximum Interest Rate	0.83	%	0.59	%
Minimum Interest Rate	0.69	%	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				Average Interest Rate for Funds Loaned to the Utility Money Pool for
	Three Months Ended March 31,				Three Months Ended March 31,
Company	2016		2015		2016		2015
APCo	0.73	%	—	%	0.73	%	0.45	%
I&M	0.72	%	0.46	%	0.74	%	0.46	%
OPCo	—	%	—	%	0.73	%	0.46	%
PSO	—	%	0.49	%	0.72	%	0.44	%
SWEPCo	0.73	%	0.46	%	—	%	0.52	%

Accounts Receivable and Accrued Unbilled Revenues

Company	March 31, 2016		December 31, 2015
	(in millions)
APCo	$	136.6	$	135.4
I&M	125.3		134.8
OPCo	339.0		351.4
PSO	94.5		116.1
SWEPCo	121.2		151.8

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	1.8	$	2.5
I&M	1.9		2.4
OPCo	7.9		8.0
PSO	1.4		1.4
SWEPCo	1.5		1.7

Proceeds on Sale of Receivables to AEP Credit

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	384.4	$	429.6
I&M	388.1		419.6
OPCo	646.6		715.0
PSO	272.1		302.5
SWEPCo	336.1		373.2

Southwestern Electric Power Co [Member]

Retirements and Principal Payments

Company	Type of Debt	Principal Amount Paid		Interest Rate	Due Date
Retirements and Principal Payments:		(in millions)		(%)
APCo	Pollution Control Bonds	$	125.3	Variable	2016
APCo	Securitization Bonds	11.2		2.008	2024
I&M	Notes Payable	0.4		Variable	2016
I&M	Notes Payable	0.3		2.12	2016
I&M	Notes Payable	6.9		Variable	2017
I&M	Notes Payable	10.2		Variable	2019
I&M	Notes Payable	10.7		Variable	2019
I&M	Other Long-term Debt	0.3		6.00	2025
OPCo	Securitization Bonds	22.8		0.958	2018
PSO	Other Long-term Debt	0.1		3.00	2027
SWEPCo	Notes Payable	1.6		4.58	2032
Non-Registrant:
AEGCo	Senior Unsecured Notes	3.7		6.33	2037
AEP Subsidiaries	Notes Payable	1.0		Variable	2017
TCC	Securitization Bonds	44.2		6.25	2016
TCC	Securitization Bonds	83.7		5.17	2018
Total Retirements and Principal Payments		$	322.4

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

Company	Maximum Borrowings from the Utility Money Pool		Maximum Loans to the Utility Money Pool		Average Borrowings from the Utility Money Pool		Average Loans to the Utility Money Pool		Net Loans to (Borrowings from) the Utility Money Pool as of March 31, 2016			Authorized Short-term Borrowing Limit
	(in millions)
APCo	$	286.9	$	25.7	$	183.2	$	25.5	$	(146.4	)	$	600.0
I&M	369.1		62.5		267.3		17.0		2.8			500.0
OPCo	—		379.2		—		304.7		221.9			400.0
PSO	—		91.0		—		48.7		8.4			300.0
SWEPCo	221.8		—		148.0		—		(217.8		)	350.0

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

	Three Months Ended March 31,
	2016		2015
Maximum Interest Rate	0.83	%	0.59	%
Minimum Interest Rate	0.69	%	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				Average Interest Rate for Funds Loaned to the Utility Money Pool for
	Three Months Ended March 31,				Three Months Ended March 31,
Company	2016		2015		2016		2015
APCo	0.73	%	—	%	0.73	%	0.45	%
I&M	0.72	%	0.46	%	0.74	%	0.46	%
OPCo	—	%	—	%	0.73	%	0.46	%
PSO	—	%	0.49	%	0.72	%	0.44	%
SWEPCo	0.73	%	0.46	%	—	%	0.52	%

Accounts Receivable and Accrued Unbilled Revenues

Company	March 31, 2016		December 31, 2015
	(in millions)
APCo	$	136.6	$	135.4
I&M	125.3		134.8
OPCo	339.0		351.4
PSO	94.5		116.1
SWEPCo	121.2		151.8

Fees Paid to AEP Credit for Customer Accounts Receivable Sold

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	1.8	$	2.5
I&M	1.9		2.4
OPCo	7.9		8.0
PSO	1.4		1.4
SWEPCo	1.5		1.7

Proceeds on Sale of Receivables to AEP Credit

	Three Months Ended March 31,
Company	2016		2015
	(in millions)
APCo	$	384.4	$	429.6
I&M	388.1		419.6
OPCo	646.6		715.0
PSO	272.1		302.5
SWEPCo	336.1		373.2

Nonutility Money Pool Activity [Table Text Block]

Maximum		Average		Loans
Loans		Loans		to the
to the		to the		Nonutility
Nonutility		Nonutility		Money Pool as of
Money Pool		Money Pool		March 31, 2016
(in millions)
$	2.0	$	2.0	$	2.0

Maximum Minimum Average Interest Rates for Funds Borrowed from Loaned to Nonutility Money Pool [Text Block]

	Maximum		Minimum		Average
	Interest Rate		Interest Rate		Interest Rate
	for Funds		for Funds		for Funds
Three	Loaned to		Loaned to		Loaned to
Months Ended	the Nonutility		the Nonutility		the Nonutility
March 31,	Money Pool		Money Pool		Money Pool
2016	0.83	%	0.69	%	0.73	%