Derivatives and Hedging (Tables)

3 Months Ended

Mar. 31, 2017

Notional Volume of Derivative Instruments

Notional Volume of Derivative Instruments

March 31, 2017

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	301.0		33.1		18.9		10.9		4.6		5.5
Coal	Tons	1.4		—		0.7		—		—		0.7
Natural Gas	MMBtus	24.3		—		—		—		—		—
Heating Oil and Gasoline	Gallons	5.4		1.0		0.5		1.2		0.6		0.6
Interest Rate	USD	$	70.3	$	—	$	—	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Notional Volume of Derivative Instruments

December 31, 2016

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	348.0		51.9		19.9		11.2		11.9		14.2
Coal	Tons	1.5		—		0.5		—		—		1.0
Natural Gas	MMBtus	32.8		—		—		—		—		—
Heating Oil and Gasoline	Gallons	7.4		1.4		0.7		1.6		0.8		0.9
Interest Rate	USD	$	75.2	$	0.1	$	0.1	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Cash Collateral Netting

	March 31, 2017				December 31, 2016
Company	Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities		Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities
	(in millions)
AEP	$	5.5	$	21.9	$	7.9	$	7.6
APCo	—		0.3		0.5		0.7
I&M	—		0.2		0.3		0.4
OPCo	—		—		0.2		—
PSO	—		—		0.1		—
SWEPCo	—		—		0.1		—

Fair Value of Derivative Instruments

AEP

Fair Value of Derivative Instruments

March 31, 2017

	Risk Management Contracts		Hedging Contracts						Gross Amounts of Risk Management Assets/ Liabilities Recognized			Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)			Interest Rate and Foreign Currency (a)
	(in millions)
Current Risk Management Assets	$	245.8	$	16.2		$	—		$	262.0		$	(177.0	)	$	85.0
Long-term Risk Management Assets	361.7		4.9			—			366.6			(56.1		)	310.5
Total Assets	607.5		21.1			—			628.6			(233.1		)	395.5
Current Risk Management Liabilities	232.9		10.8			—			243.7			(175.5		)	68.2
Long-term Risk Management Liabilities	346.0		70.9			1.9			418.8			(74.0		)	344.8
Total Liabilities	578.9		81.7			1.9			662.5			(249.5		)	413.0
Total MTM Derivative Contract Net Assets (Liabilities)	$	28.6	$	(60.6	)	$	(1.9	)	$	(33.9	)	$	16.4		$	(17.5	)

AEP

Fair Value of Derivative Instruments

December 31, 2016

	Risk Management Contracts		Hedging Contracts						Gross Amounts of Risk Management Assets/ Liabilities Recognized		Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location	Commodity (a)		Commodity (a)			Interest Rate and Foreign Currency (a)
	(in millions)
Current Risk Management Assets	$	264.4	$	13.2		$	—		$	277.6	$	(183.1	)	$	94.5
Long-term Risk Management Assets	315.0		7.7			—			322.7		(33.6		)	289.1
Total Assets	579.4		20.9			—			600.3		(216.7		)	383.6
Current Risk Management Liabilities	227.2		6.3			—			233.5		(180.1		)	53.4
Long-term Risk Management Liabilities	301.0		50.1			1.4			352.5		(36.3		)	316.2
Total Liabilities	528.2		56.4			1.4			586.0		(216.4		)	369.6
Total MTM Derivative Contract Net Assets (Liabilities)	$	51.2	$	(35.5	)	$	(1.4	)	$	14.3	$	(0.3	)	$	14.0

(a) Derivative instruments within these categories are reported gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b) Amounts primarily include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c) There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain (Loss) Recognized on Risk Management Contracts

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2017

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	5.5		$	—		$	—		$	—		$	—	$	—
Generation & Marketing Revenues	10.5			—			—			—			—		—
Electric Generation, Transmission and Distribution Revenues (a)	—			0.4			5.2			—			—		0.1
Purchased Electricity for Resale	2.4			0.8			0.1			—			—		—
Other Operation Expense	0.2			—			—			—			—		—
Maintenance Expense	0.2			—			—			—			—		—
Regulatory Assets (b)	(14.9		)	(5.8		)	(0.2		)	(8.6		)	—		(0.2		)
Regulatory Liabilities (b)	25.2			10.9			6.8			—			2.4		4.6
Total Gain (Loss) on Risk Management Contracts	$	29.1		$	6.3		$	11.9		$	(8.6	)	$	2.4	$	4.5

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2016

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	0.6		$	—		$	—		$	—		$	—		$	—
Transmission and Distribution Utilities Revenues	(3.5		)	—			—			—			—			—
Generation & Marketing Revenues	19.8			—			—			—			—			—
Electric Generation, Transmission and Distribution Revenues (a)	—			(0.8		)	1.6			(3.5		)	—			—
Sales to AEP Affiliates	—			1.1			4.0			—			—			—
Purchased Electricity for Resale	2.1			1.4			0.1			—			—			—
Other Operation Expense	(0.7		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Maintenance Expense	(0.8		)	(0.2		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Regulatory Assets (b)	(11.1		)	0.2			0.3			(11.4		)	(0.5		)	0.1
Regulatory Liabilities (b)	12.7			15.9			3.9			(15.2		)	—			4.5
Total Gain (Loss) on Risk Management Contracts	$	19.1		$	17.5		$	9.7		$	(30.3	)	$	(0.7	)	$	4.4

(a) Amounts for OPCo represents Electricity, Transmission and Distribution.

(b) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Gain (Loss) on Hedging Instruments

	Three Months Ended March 31,
	2017			2016
	(in millions)
Gain (Loss) on Fair Value Hedging Instruments	$	(0.5	)	$	3.5
Gain (Loss) on Fair Value Portion of Long-term Debt	0.5			(3.5		)

Impact of Cash Flow Hedges on the Condensed Balance Sheet

Impact of Cash Flow Hedges on AEP’s Balance Sheets

	March 31, 2017						December 31, 2016
	Commodity			Interest Rate			Commodity			Interest Rate
	(in millions)
Hedging Assets (a)	$	13.0		$	—		$	11.2		$	—
Hedging Liabilities (a)	73.6			—			46.7			—
AOCI Loss Net of Tax	(39.6		)	(15.3		)	(23.1		)	(15.7		)
Portion Expected to be Reclassified to Net Income During the Next Twelve Months	3.3			(1.0		)	4.3			(1.0		)

(a) Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the balance sheets.

Collateral Required Under Various Triggering Events

	March 31, 2017					December 31, 2016
Company	Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts			Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts
	(in millions)
AEP	$	35.2	$	197.2	(a)	$	9.3	$	280.3	(a)
APCo	6.7		—			1.0		—
I&M	3.9		—			0.6		—
PSO	5.1		3.2			2.1		3.2
SWEPCo	6.1		0.1			2.5		0.1

(a) Represents the amount of collateral AEP subsidiaries would have been required to post for other significant non-derivative contracts including AGR jointly owned plant contracts and various other commodity related contacts.

Liabilities Subject to Cross Default Provisions

	March 31, 2017
Company	Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements		Amount of Cash Collateral Posted		Additional Settlement Liability if Cross Default Provision is Triggered
	(in millions)
AEP	$	287.1	$	6.5	$	267.4
APCo	—		—		—
I&M	—		—		—

	December 31, 2016
Company	Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements		Amount of Cash Collateral Posted		Additional Settlement Liability if Cross Default Provision is Triggered
	(in millions)
AEP	$	259.6	$	0.4	$	235.8
APCo	0.1		—		—
I&M	0.1		—		—

Appalachian Power Co [Member]

Notional Volume of Derivative Instruments

Notional Volume of Derivative Instruments

March 31, 2017

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	301.0		33.1		18.9		10.9		4.6		5.5
Coal	Tons	1.4		—		0.7		—		—		0.7
Natural Gas	MMBtus	24.3		—		—		—		—		—
Heating Oil and Gasoline	Gallons	5.4		1.0		0.5		1.2		0.6		0.6
Interest Rate	USD	$	70.3	$	—	$	—	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Notional Volume of Derivative Instruments

December 31, 2016

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	348.0		51.9		19.9		11.2		11.9		14.2
Coal	Tons	1.5		—		0.5		—		—		1.0
Natural Gas	MMBtus	32.8		—		—		—		—		—
Heating Oil and Gasoline	Gallons	7.4		1.4		0.7		1.6		0.8		0.9
Interest Rate	USD	$	75.2	$	0.1	$	0.1	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Cash Collateral Netting

	March 31, 2017				December 31, 2016
Company	Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities		Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities
	(in millions)
AEP	$	5.5	$	21.9	$	7.9	$	7.6
APCo	—		0.3		0.5		0.7
I&M	—		0.2		0.3		0.4
OPCo	—		—		0.2		—
PSO	—		—		0.1		—
SWEPCo	—		—		0.1		—

Fair Value of Derivative Instruments

APCo

Fair Value of Derivative Instruments

March 31, 2017

	Risk Management Contracts - Commodity (a)			Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	19.2		$	(18.1	)	$	1.1
Long-term Risk Management Assets	5.7			(5.5		)	0.2
Total Assets	24.9			(23.6		)	1.3
Current Risk Management Liabilities	24.7			(18.1		)	6.6
Long-term Risk Management Liabilities	5.9			(5.8		)	0.1
Total Liabilities	30.6			(23.9		)	6.7
Total MTM Derivative Contract Net Assets (Liabilities)	$	(5.7	)	$	0.3		$	(5.4	)

APCo

Fair Value of Derivative Instruments

December 31, 2016

	Risk Management Contracts - Commodity (a)		Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	22.7	$	(20.1	)	$	2.6
Long-term Risk Management Assets	1.9		(1.9		)	—
Total Assets	24.6		(22.0		)	2.6
Current Risk Management Liabilities	20.6		(20.3		)	0.3
Long-term Risk Management Liabilities	2.8		(1.9		)	0.9
Total Liabilities	23.4		(22.2		)	1.2
Total MTM Derivative Contract Net Assets	$	1.2	$	0.2		$	1.4

(a) Derivative instruments within these categories are reported gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b) Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c) There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain (Loss) Recognized on Risk Management Contracts

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2017

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	5.5		$	—		$	—		$	—		$	—	$	—
Generation & Marketing Revenues	10.5			—			—			—			—		—
Electric Generation, Transmission and Distribution Revenues (a)	—			0.4			5.2			—			—		0.1
Purchased Electricity for Resale	2.4			0.8			0.1			—			—		—
Other Operation Expense	0.2			—			—			—			—		—
Maintenance Expense	0.2			—			—			—			—		—
Regulatory Assets (b)	(14.9		)	(5.8		)	(0.2		)	(8.6		)	—		(0.2		)
Regulatory Liabilities (b)	25.2			10.9			6.8			—			2.4		4.6
Total Gain (Loss) on Risk Management Contracts	$	29.1		$	6.3		$	11.9		$	(8.6	)	$	2.4	$	4.5

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2016

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	0.6		$	—		$	—		$	—		$	—		$	—
Transmission and Distribution Utilities Revenues	(3.5		)	—			—			—			—			—
Generation & Marketing Revenues	19.8			—			—			—			—			—
Electric Generation, Transmission and Distribution Revenues (a)	—			(0.8		)	1.6			(3.5		)	—			—
Sales to AEP Affiliates	—			1.1			4.0			—			—			—
Purchased Electricity for Resale	2.1			1.4			0.1			—			—			—
Other Operation Expense	(0.7		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Maintenance Expense	(0.8		)	(0.2		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Regulatory Assets (b)	(11.1		)	0.2			0.3			(11.4		)	(0.5		)	0.1
Regulatory Liabilities (b)	12.7			15.9			3.9			(15.2		)	—			4.5
Total Gain (Loss) on Risk Management Contracts	$	19.1		$	17.5		$	9.7		$	(30.3	)	$	(0.7	)	$	4.4

(a) Amounts for OPCo represents Electricity, Transmission and Distribution.

(b) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Impact of Cash Flow Hedges on the Condensed Balance Sheet

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	March 31, 2017						December 31, 2016
	Interest Rate
Company	AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months			AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months
	(in millions)
APCo	$	2.7		$	0.7		$	2.9		$	0.7
I&M	(11.7		)	(1.3		)	(12.0		)	(1.3		)
OPCo	2.8			1.1			3.0			1.1
PSO	3.2			0.8			3.4			0.8
SWEPCo	(6.9		)	(1.4		)	(7.4		)	(1.4		)

Collateral Required Under Various Triggering Events

	March 31, 2017					December 31, 2016
Company	Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts			Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts
	(in millions)
AEP	$	35.2	$	197.2	(a)	$	9.3	$	280.3	(a)
APCo	6.7		—			1.0		—
I&M	3.9		—			0.6		—
PSO	5.1		3.2			2.1		3.2
SWEPCo	6.1		0.1			2.5		0.1

(a) Represents the amount of collateral AEP subsidiaries would have been required to post for other significant non-derivative contracts including AGR jointly owned plant contracts and various other commodity related contacts.

Liabilities Subject to Cross Default Provisions

	March 31, 2017
Company	Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements		Amount of Cash Collateral Posted		Additional Settlement Liability if Cross Default Provision is Triggered
	(in millions)
AEP	$	287.1	$	6.5	$	267.4
APCo	—		—		—
I&M	—		—		—

	December 31, 2016
Company	Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements		Amount of Cash Collateral Posted		Additional Settlement Liability if Cross Default Provision is Triggered
	(in millions)
AEP	$	259.6	$	0.4	$	235.8
APCo	0.1		—		—
I&M	0.1		—		—

Indiana Michigan Power Co [Member]

Notional Volume of Derivative Instruments

Notional Volume of Derivative Instruments

March 31, 2017

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	301.0		33.1		18.9		10.9		4.6		5.5
Coal	Tons	1.4		—		0.7		—		—		0.7
Natural Gas	MMBtus	24.3		—		—		—		—		—
Heating Oil and Gasoline	Gallons	5.4		1.0		0.5		1.2		0.6		0.6
Interest Rate	USD	$	70.3	$	—	$	—	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Notional Volume of Derivative Instruments

December 31, 2016

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	348.0		51.9		19.9		11.2		11.9		14.2
Coal	Tons	1.5		—		0.5		—		—		1.0
Natural Gas	MMBtus	32.8		—		—		—		—		—
Heating Oil and Gasoline	Gallons	7.4		1.4		0.7		1.6		0.8		0.9
Interest Rate	USD	$	75.2	$	0.1	$	0.1	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Cash Collateral Netting

	March 31, 2017				December 31, 2016
Company	Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities		Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities
	(in millions)
AEP	$	5.5	$	21.9	$	7.9	$	7.6
APCo	—		0.3		0.5		0.7
I&M	—		0.2		0.3		0.4
OPCo	—		—		0.2		—
PSO	—		—		0.1		—
SWEPCo	—		—		0.1		—

Fair Value of Derivative Instruments

I&M

Fair Value of Derivative Instruments

March 31, 2017

	Risk Management Contracts - Commodity (a)			Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	16.7		$	(14.3	)	$	2.4
Long-term Risk Management Assets	3.9			(3.3		)	0.6
Total Assets	20.6			(17.6		)	3.0
Current Risk Management Liabilities	17.1			(14.3		)	2.8
Long-term Risk Management Liabilities	3.6			(3.5		)	0.1
Total Liabilities	20.7			(17.8		)	2.9
Total MTM Derivative Contract Net Assets (Liabilities)	$	(0.1	)	$	0.2		$	0.1

I&M

Fair Value of Derivative Instruments

December 31, 2016

	Risk Management Contracts - Commodity (a)		Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	14.9	$	(11.4	)	$	3.5
Long-term Risk Management Assets	1.1		(1.1		)	—
Total Assets	16.0		(12.5		)	3.5
Current Risk Management Liabilities	11.8		(11.5		)	0.3
Long-term Risk Management Liabilities	1.9		(1.1		)	0.8
Total Liabilities	13.7		(12.6		)	1.1
Total MTM Derivative Contract Net Assets	$	2.3	$	0.1		$	2.4

(a) Derivative instruments within these categories are reported gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b) Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c) There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain (Loss) Recognized on Risk Management Contracts

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2017

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	5.5		$	—		$	—		$	—		$	—	$	—
Generation & Marketing Revenues	10.5			—			—			—			—		—
Electric Generation, Transmission and Distribution Revenues (a)	—			0.4			5.2			—			—		0.1
Purchased Electricity for Resale	2.4			0.8			0.1			—			—		—
Other Operation Expense	0.2			—			—			—			—		—
Maintenance Expense	0.2			—			—			—			—		—
Regulatory Assets (b)	(14.9		)	(5.8		)	(0.2		)	(8.6		)	—		(0.2		)
Regulatory Liabilities (b)	25.2			10.9			6.8			—			2.4		4.6
Total Gain (Loss) on Risk Management Contracts	$	29.1		$	6.3		$	11.9		$	(8.6	)	$	2.4	$	4.5

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2016

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	0.6		$	—		$	—		$	—		$	—		$	—
Transmission and Distribution Utilities Revenues	(3.5		)	—			—			—			—			—
Generation & Marketing Revenues	19.8			—			—			—			—			—
Electric Generation, Transmission and Distribution Revenues (a)	—			(0.8		)	1.6			(3.5		)	—			—
Sales to AEP Affiliates	—			1.1			4.0			—			—			—
Purchased Electricity for Resale	2.1			1.4			0.1			—			—			—
Other Operation Expense	(0.7		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Maintenance Expense	(0.8		)	(0.2		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Regulatory Assets (b)	(11.1		)	0.2			0.3			(11.4		)	(0.5		)	0.1
Regulatory Liabilities (b)	12.7			15.9			3.9			(15.2		)	—			4.5
Total Gain (Loss) on Risk Management Contracts	$	19.1		$	17.5		$	9.7		$	(30.3	)	$	(0.7	)	$	4.4

(a) Amounts for OPCo represents Electricity, Transmission and Distribution.

(b) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Impact of Cash Flow Hedges on the Condensed Balance Sheet

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	March 31, 2017						December 31, 2016
	Interest Rate
Company	AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months			AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months
	(in millions)
APCo	$	2.7		$	0.7		$	2.9		$	0.7
I&M	(11.7		)	(1.3		)	(12.0		)	(1.3		)
OPCo	2.8			1.1			3.0			1.1
PSO	3.2			0.8			3.4			0.8
SWEPCo	(6.9		)	(1.4		)	(7.4		)	(1.4		)

Collateral Required Under Various Triggering Events

	March 31, 2017					December 31, 2016
Company	Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts			Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts
	(in millions)
AEP	$	35.2	$	197.2	(a)	$	9.3	$	280.3	(a)
APCo	6.7		—			1.0		—
I&M	3.9		—			0.6		—
PSO	5.1		3.2			2.1		3.2
SWEPCo	6.1		0.1			2.5		0.1

(a) Represents the amount of collateral AEP subsidiaries would have been required to post for other significant non-derivative contracts including AGR jointly owned plant contracts and various other commodity related contacts.

Liabilities Subject to Cross Default Provisions

	March 31, 2017
Company	Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements		Amount of Cash Collateral Posted		Additional Settlement Liability if Cross Default Provision is Triggered
	(in millions)
AEP	$	287.1	$	6.5	$	267.4
APCo	—		—		—
I&M	—		—		—

	December 31, 2016
Company	Liabilities for Contracts with Cross Default Provisions Prior to Contractual Netting Arrangements		Amount of Cash Collateral Posted		Additional Settlement Liability if Cross Default Provision is Triggered
	(in millions)
AEP	$	259.6	$	0.4	$	235.8
APCo	0.1		—		—
I&M	0.1		—		—

Ohio Power Co [Member]

Notional Volume of Derivative Instruments

Notional Volume of Derivative Instruments

March 31, 2017

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	301.0		33.1		18.9		10.9		4.6		5.5
Coal	Tons	1.4		—		0.7		—		—		0.7
Natural Gas	MMBtus	24.3		—		—		—		—		—
Heating Oil and Gasoline	Gallons	5.4		1.0		0.5		1.2		0.6		0.6
Interest Rate	USD	$	70.3	$	—	$	—	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Notional Volume of Derivative Instruments

December 31, 2016

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	348.0		51.9		19.9		11.2		11.9		14.2
Coal	Tons	1.5		—		0.5		—		—		1.0
Natural Gas	MMBtus	32.8		—		—		—		—		—
Heating Oil and Gasoline	Gallons	7.4		1.4		0.7		1.6		0.8		0.9
Interest Rate	USD	$	75.2	$	0.1	$	0.1	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Cash Collateral Netting

	March 31, 2017				December 31, 2016
Company	Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities		Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities
	(in millions)
AEP	$	5.5	$	21.9	$	7.9	$	7.6
APCo	—		0.3		0.5		0.7
I&M	—		0.2		0.3		0.4
OPCo	—		—		0.2		—
PSO	—		—		0.1		—
SWEPCo	—		—		0.1		—

Fair Value of Derivative Instruments

OPCo

Fair Value of Derivative Instruments

March 31, 2017

	Risk Management Contracts - Commodity (a)			Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	0.1		$	—	$	0.1
Long-term Risk Management Assets	—			—		—
Total Assets	0.1			—		0.1
Current Risk Management Liabilities	6.3			—		6.3
Long-term Risk Management Liabilities	118.3			—		118.3
Total Liabilities	124.6			—		124.6
Total MTM Derivative Contract Net Liabilities	$	(124.5	)	$	—	$	(124.5	)

OPCo

Fair Value of Derivative Instruments

December 31, 2016

	Risk Management Contracts - Commodity (a)			Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	0.4		$	(0.2	)	$	0.2
Long-term Risk Management Assets	—			—			—
Total Assets	0.4			(0.2		)	0.2
Current Risk Management Liabilities	5.9			—			5.9
Long-term Risk Management Liabilities	113.1			—			113.1
Total Liabilities	119.0			—			119.0
Total MTM Derivative Contract Net Liabilities	$	(118.6	)	$	(0.2	)	$	(118.8	)

(a) Derivative instruments within these categories are reported gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b) Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c) There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain (Loss) Recognized on Risk Management Contracts

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2017

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	5.5		$	—		$	—		$	—		$	—	$	—
Generation & Marketing Revenues	10.5			—			—			—			—		—
Electric Generation, Transmission and Distribution Revenues (a)	—			0.4			5.2			—			—		0.1
Purchased Electricity for Resale	2.4			0.8			0.1			—			—		—
Other Operation Expense	0.2			—			—			—			—		—
Maintenance Expense	0.2			—			—			—			—		—
Regulatory Assets (b)	(14.9		)	(5.8		)	(0.2		)	(8.6		)	—		(0.2		)
Regulatory Liabilities (b)	25.2			10.9			6.8			—			2.4		4.6
Total Gain (Loss) on Risk Management Contracts	$	29.1		$	6.3		$	11.9		$	(8.6	)	$	2.4	$	4.5

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2016

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	0.6		$	—		$	—		$	—		$	—		$	—
Transmission and Distribution Utilities Revenues	(3.5		)	—			—			—			—			—
Generation & Marketing Revenues	19.8			—			—			—			—			—
Electric Generation, Transmission and Distribution Revenues (a)	—			(0.8		)	1.6			(3.5		)	—			—
Sales to AEP Affiliates	—			1.1			4.0			—			—			—
Purchased Electricity for Resale	2.1			1.4			0.1			—			—			—
Other Operation Expense	(0.7		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Maintenance Expense	(0.8		)	(0.2		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Regulatory Assets (b)	(11.1		)	0.2			0.3			(11.4		)	(0.5		)	0.1
Regulatory Liabilities (b)	12.7			15.9			3.9			(15.2		)	—			4.5
Total Gain (Loss) on Risk Management Contracts	$	19.1		$	17.5		$	9.7		$	(30.3	)	$	(0.7	)	$	4.4

(a) Amounts for OPCo represents Electricity, Transmission and Distribution.

(b) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Impact of Cash Flow Hedges on the Condensed Balance Sheet

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	March 31, 2017						December 31, 2016
	Interest Rate
Company	AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months			AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months
	(in millions)
APCo	$	2.7		$	0.7		$	2.9		$	0.7
I&M	(11.7		)	(1.3		)	(12.0		)	(1.3		)
OPCo	2.8			1.1			3.0			1.1
PSO	3.2			0.8			3.4			0.8
SWEPCo	(6.9		)	(1.4		)	(7.4		)	(1.4		)

Public Service Co Of Oklahoma [Member]

Notional Volume of Derivative Instruments

Notional Volume of Derivative Instruments

March 31, 2017

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	301.0		33.1		18.9		10.9		4.6		5.5
Coal	Tons	1.4		—		0.7		—		—		0.7
Natural Gas	MMBtus	24.3		—		—		—		—		—
Heating Oil and Gasoline	Gallons	5.4		1.0		0.5		1.2		0.6		0.6
Interest Rate	USD	$	70.3	$	—	$	—	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Notional Volume of Derivative Instruments

December 31, 2016

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	348.0		51.9		19.9		11.2		11.9		14.2
Coal	Tons	1.5		—		0.5		—		—		1.0
Natural Gas	MMBtus	32.8		—		—		—		—		—
Heating Oil and Gasoline	Gallons	7.4		1.4		0.7		1.6		0.8		0.9
Interest Rate	USD	$	75.2	$	0.1	$	0.1	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Cash Collateral Netting

	March 31, 2017				December 31, 2016
Company	Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities		Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities
	(in millions)
AEP	$	5.5	$	21.9	$	7.9	$	7.6
APCo	—		0.3		0.5		0.7
I&M	—		0.2		0.3		0.4
OPCo	—		—		0.2		—
PSO	—		—		0.1		—
SWEPCo	—		—		0.1		—

Fair Value of Derivative Instruments

PSO

Fair Value of Derivative Instruments

March 31, 2017

	Risk Management Contracts - Commodity (a)		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	0.5	$	—	$	0.5
Long-term Risk Management Assets	—		—		—
Total Assets	0.5		—		0.5
Current Risk Management Liabilities	—		—		—
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	—		—		—
Total MTM Derivative Contract Net Assets	$	0.5	$	—	$	0.5

PSO

Fair Value of Derivative Instruments

December 31, 2016

	Risk Management Contracts - Commodity (a)		Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	0.9	$	(0.1	)	$	0.8
Long-term Risk Management Assets	—		—			—
Total Assets	0.9		(0.1		)	0.8
Current Risk Management Liabilities	—		—			—
Long-term Risk Management Liabilities	—		—			—
Total Liabilities	—		—			—
Total MTM Derivative Contract Net Assets (Liabilities)	$	0.9	$	(0.1	)	$	0.8

(a) Derivative instruments within these categories are reported gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b) Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c) There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain (Loss) Recognized on Risk Management Contracts

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2017

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	5.5		$	—		$	—		$	—		$	—	$	—
Generation & Marketing Revenues	10.5			—			—			—			—		—
Electric Generation, Transmission and Distribution Revenues (a)	—			0.4			5.2			—			—		0.1
Purchased Electricity for Resale	2.4			0.8			0.1			—			—		—
Other Operation Expense	0.2			—			—			—			—		—
Maintenance Expense	0.2			—			—			—			—		—
Regulatory Assets (b)	(14.9		)	(5.8		)	(0.2		)	(8.6		)	—		(0.2		)
Regulatory Liabilities (b)	25.2			10.9			6.8			—			2.4		4.6
Total Gain (Loss) on Risk Management Contracts	$	29.1		$	6.3		$	11.9		$	(8.6	)	$	2.4	$	4.5

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2016

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	0.6		$	—		$	—		$	—		$	—		$	—
Transmission and Distribution Utilities Revenues	(3.5		)	—			—			—			—			—
Generation & Marketing Revenues	19.8			—			—			—			—			—
Electric Generation, Transmission and Distribution Revenues (a)	—			(0.8		)	1.6			(3.5		)	—			—
Sales to AEP Affiliates	—			1.1			4.0			—			—			—
Purchased Electricity for Resale	2.1			1.4			0.1			—			—			—
Other Operation Expense	(0.7		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Maintenance Expense	(0.8		)	(0.2		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Regulatory Assets (b)	(11.1		)	0.2			0.3			(11.4		)	(0.5		)	0.1
Regulatory Liabilities (b)	12.7			15.9			3.9			(15.2		)	—			4.5
Total Gain (Loss) on Risk Management Contracts	$	19.1		$	17.5		$	9.7		$	(30.3	)	$	(0.7	)	$	4.4

(a) Amounts for OPCo represents Electricity, Transmission and Distribution.

(b) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Impact of Cash Flow Hedges on the Condensed Balance Sheet

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	March 31, 2017						December 31, 2016
	Interest Rate
Company	AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months			AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months
	(in millions)
APCo	$	2.7		$	0.7		$	2.9		$	0.7
I&M	(11.7		)	(1.3		)	(12.0		)	(1.3		)
OPCo	2.8			1.1			3.0			1.1
PSO	3.2			0.8			3.4			0.8
SWEPCo	(6.9		)	(1.4		)	(7.4		)	(1.4		)

Collateral Required Under Various Triggering Events

	March 31, 2017					December 31, 2016
Company	Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts			Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts
	(in millions)
AEP	$	35.2	$	197.2	(a)	$	9.3	$	280.3	(a)
APCo	6.7		—			1.0		—
I&M	3.9		—			0.6		—
PSO	5.1		3.2			2.1		3.2
SWEPCo	6.1		0.1			2.5		0.1

(a) Represents the amount of collateral AEP subsidiaries would have been required to post for other significant non-derivative contracts including AGR jointly owned plant contracts and various other commodity related contacts.

Southwestern Electric Power Co [Member]

Notional Volume of Derivative Instruments

Notional Volume of Derivative Instruments

March 31, 2017

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	301.0		33.1		18.9		10.9		4.6		5.5
Coal	Tons	1.4		—		0.7		—		—		0.7
Natural Gas	MMBtus	24.3		—		—		—		—		—
Heating Oil and Gasoline	Gallons	5.4		1.0		0.5		1.2		0.6		0.6
Interest Rate	USD	$	70.3	$	—	$	—	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Notional Volume of Derivative Instruments

December 31, 2016

Primary Risk Exposure	Unit of Measure	AEP		APCo		I&M		OPCo		PSO		SWEPCo
		(in millions)
Commodity:
Power	MWhs	348.0		51.9		19.9		11.2		11.9		14.2
Coal	Tons	1.5		—		0.5		—		—		1.0
Natural Gas	MMBtus	32.8		—		—		—		—		—
Heating Oil and Gasoline	Gallons	7.4		1.4		0.7		1.6		0.8		0.9
Interest Rate	USD	$	75.2	$	0.1	$	0.1	$	—	$	—	$	—
Interest Rate and Foreign Currency	USD	$	500.0	$	—	$	—	$	—	$	—	$	—

Cash Collateral Netting

	March 31, 2017				December 31, 2016
Company	Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities		Cash Collateral Received Netted Against Risk Management Assets		Cash Collateral Paid Netted Against Risk Management Liabilities
	(in millions)
AEP	$	5.5	$	21.9	$	7.9	$	7.6
APCo	—		0.3		0.5		0.7
I&M	—		0.2		0.3		0.4
OPCo	—		—		0.2		—
PSO	—		—		0.1		—
SWEPCo	—		—		0.1		—

Fair Value of Derivative Instruments

SWEPCo

Fair Value of Derivative Instruments

March 31, 2017

	Risk Management Contracts - Commodity (a)		Gross Amounts Offset in the Statement of Financial Position (b)		Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	0.6	$	—	$	0.6
Long-term Risk Management Assets	—		—		—
Total Assets	0.6		—		0.6
Current Risk Management Liabilities	0.4		—		0.4
Long-term Risk Management Liabilities	—		—		—
Total Liabilities	0.4		—		0.4
Total MTM Derivative Contract Net Assets	$	0.2	$	—	$	0.2

SWEPCo

Fair Value of Derivative Instruments

December 31, 2016

	Risk Management Contracts - Commodity (a)		Gross Amounts Offset in the Statement of Financial Position (b)			Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location
	(in millions)
Current Risk Management Assets	$	1.1	$	(0.2	)	$	0.9
Long-term Risk Management Assets	—		—			—
Total Assets	1.1		(0.2		)	0.9
Current Risk Management Liabilities	0.4		(0.1		)	0.3
Long-term Risk Management Liabilities	—		—			—
Total Liabilities	0.4		(0.1		)	0.3
Total MTM Derivative Contract Net Assets (Liabilities)	$	0.7	$	(0.1	)	$	0.6

(a) Derivative instruments within these categories are reported gross.  These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.”

(b) Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.”

(c) There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain (Loss) Recognized on Risk Management Contracts

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2017

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO		SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	5.5		$	—		$	—		$	—		$	—	$	—
Generation & Marketing Revenues	10.5			—			—			—			—		—
Electric Generation, Transmission and Distribution Revenues (a)	—			0.4			5.2			—			—		0.1
Purchased Electricity for Resale	2.4			0.8			0.1			—			—		—
Other Operation Expense	0.2			—			—			—			—		—
Maintenance Expense	0.2			—			—			—			—		—
Regulatory Assets (b)	(14.9		)	(5.8		)	(0.2		)	(8.6		)	—		(0.2		)
Regulatory Liabilities (b)	25.2			10.9			6.8			—			2.4		4.6
Total Gain (Loss) on Risk Management Contracts	$	29.1		$	6.3		$	11.9		$	(8.6	)	$	2.4	$	4.5

Amount of Gain (Loss) Recognized on

Risk Management Contracts

For the Three Months Ended March 31, 2016

Location of Gain (Loss)	AEP			APCo			I&M			OPCo			PSO			SWEPCo
	(in millions)
Vertically Integrated Utilities Revenues	$	0.6		$	—		$	—		$	—		$	—		$	—
Transmission and Distribution Utilities Revenues	(3.5		)	—			—			—			—			—
Generation & Marketing Revenues	19.8			—			—			—			—			—
Electric Generation, Transmission and Distribution Revenues (a)	—			(0.8		)	1.6			(3.5		)	—			—
Sales to AEP Affiliates	—			1.1			4.0			—			—			—
Purchased Electricity for Resale	2.1			1.4			0.1			—			—			—
Other Operation Expense	(0.7		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Maintenance Expense	(0.8		)	(0.2		)	(0.1		)	(0.1		)	(0.1		)	(0.1		)
Regulatory Assets (b)	(11.1		)	0.2			0.3			(11.4		)	(0.5		)	0.1
Regulatory Liabilities (b)	12.7			15.9			3.9			(15.2		)	—			4.5
Total Gain (Loss) on Risk Management Contracts	$	19.1		$	17.5		$	9.7		$	(30.3	)	$	(0.7	)	$	4.4

(a) Amounts for OPCo represents Electricity, Transmission and Distribution.

(b) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets.

Impact of Cash Flow Hedges on the Condensed Balance Sheet

Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets

	March 31, 2017						December 31, 2016
	Interest Rate
Company	AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months			AOCI Gain (Loss) Net of Tax			Expected to be Reclassified to Net Income During the Next Twelve Months
	(in millions)
APCo	$	2.7		$	0.7		$	2.9		$	0.7
I&M	(11.7		)	(1.3		)	(12.0		)	(1.3		)
OPCo	2.8			1.1			3.0			1.1
PSO	3.2			0.8			3.4			0.8
SWEPCo	(6.9		)	(1.4		)	(7.4		)	(1.4		)

Collateral Required Under Various Triggering Events

	March 31, 2017					December 31, 2016
Company	Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts			Amount of Collateral That Would Have Been Required to Post Attributable to RTOs and ISOs		Amount of Collateral Attributable to Other Contracts
	(in millions)
AEP	$	35.2	$	197.2	(a)	$	9.3	$	280.3	(a)
APCo	6.7		—			1.0		—
I&M	3.9		—			0.6		—
PSO	5.1		3.2			2.1		3.2
SWEPCo	6.1		0.1			2.5		0.1

(a) Represents the amount of collateral AEP subsidiaries would have been required to post for other significant non-derivative contracts including AGR jointly owned plant contracts and various other commodity related contacts.