FAIR VALUE MEASUREMENTS

Fair value is the exchange price to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. The fair value definition focuses on an exit price versus the acquisition cost. Fair value measurements use market data or assumptions market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs may be readily observable, corroborated by market data or generally unobservable. Valuation techniques maximize the use of observable inputs and minimize use of unobservable inputs. A midmarket pricing convention (the midpoint price between bid and ask prices) is permitted for use as a practical expedient.

Fair value measurements are classified in three levels based on the fair value hierarchy:

Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date. An active market is one in which transactions for an asset or liability occur with sufficient frequency and volume to provide ongoing pricing information.

Level 2 – A fair value measurement utilizing inputs other than quoted prices included in Level 1 that are observable, either directly or indirectly, for an asset or liability. Inputs include (i) quoted prices for similar assets or liabilities in active markets, (ii) quoted prices for identical or similar assets or liabilities in markets that are not active and (iii) inputs other than quoted market prices that are observable for the asset or liability, such as interest rate curves and yield curves observable at commonly quoted intervals, volatilities and credit spreads. A Level 2 measurement cannot have more than an insignificant portion of its valuation based on unobservable inputs. Instruments in this category include non-exchange-traded derivatives, such as over-the-counter forwards, swaps and options; certain marketable debt securities; and financial instruments traded in less than active markets.

Level 3 – Any fair value measurement which includes unobservable inputs for more than an insignificant portion of the valuation. These inputs may be used with internally developed methodologies that result in management’s best estimate of fair value. Level 3 measurements may include longer-term instruments that extend into periods in which observable inputs are not available.

The fair value accounting guidance permits entities to elect to measure certain financial instruments that are not required to be accounted for at fair value, such as equity method investments or the company’s own debt, at fair value. The Duke Energy Registrants have not elected to record any of these items at fair value.

Transfers between levels represent assets or liabilities that were previously (i) categorized at a higher level for which the inputs to the estimate became less observable or (ii) classified at a lower level for which the inputs became more observable during the period. The Duke Energy Registrant’s policy is to recognize transfers between levels of the fair value hierarchy at the end of the period. There were no transfers between levels 1 and 2 during the three and six months ended June 30, 2015 and 2014. Transfers out of Level 3 during the three and six months ended June 30, 2015 are the result of forward commodity prices becoming observable due to the passage of time.

Valuation methods of the primary fair value measurements disclosed below are as follows.

Investments in equity securities

The majority of investments in equity securities are valued using Level 1 measurements. Investments in equity securities are typically valued at the closing price in the principal active market as of the last business day of the quarter. Principal active markets for equity prices include published exchanges such as Nasdaq composite (NASDAQ) and New York Stock Exchange (NYSE). Foreign equity prices are translated from their trading currency using the currency exchange rate in effect at the close of the principal active market. There was no after-hours market activity that was required to be reflected in the reported fair value measurements. Investments in equity securities that are Level 2 or 3 are typically ownership interests in commingled investment funds.

Investments in debt securities

With the exception of U.S. Treasuries which are classified as Level 1, most investments in debt securities are valued using Level 2 measurements because the valuations use interest rate curves and credit spreads applied to the terms of the debt instrument (maturity and coupon interest rate) and consider the counterparty credit rating. If the market for a particular fixed income security is relatively inactive or illiquid, the measurement is Level 3.

Commodity derivatives

Commodity derivatives with clearinghouses are classified as Level 1. Other commodity derivatives are primarily fair valued using internally developed discounted cash flow models which incorporate forward price, adjustments for liquidity (bid-ask spread) and credit or nonperformance risk (after reflecting credit enhancements such as collateral), and are discounted to present value. Pricing inputs are derived from published exchange transaction prices and other observable data sources. In the absence of an active market, the last available price may be used. If forward price curves are not observable for the full term of the contract and the unobservable period had more than an insignificant impact on the valuation, the commodity derivative is classified as Level 3. In isolation, increases (decreases) in natural gas forward prices result in favorable (unfavorable) fair value adjustments for natural gas purchase contracts; and increases (decreases) in electricity forward prices result in unfavorable (favorable) fair value adjustments for electricity sales contracts. Duke Energy regularly evaluates and validates pricing inputs used to estimate fair value of natural gas commodity contracts by a market participant price verification procedure. This procedure provides a comparison of internal forward commodity curves to market participant generated curves.

Interest rate derivatives

Most over-the-counter interest rate contract derivatives are valued using financial models which utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward interest rate curves, notional amounts, interest rates and credit quality of the counterparties.

Goodwill, Long-lived Assets and Assets Held for Sale

See Note 8 for a discussion of the valuation of goodwill and long-lived assets and Note 2 related to the assets and related liabilities of the Disposal Group classified as held for sale.

DUKE ENERGY

The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the table below exclude cash collateral, which is disclosed in Note 10. See Note 11 for additional information related to investments by major security type.



	June 30, 2015
(in millions)	Total Fair Value			Level 1			Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	3,654		$	3,485		$	1		$	168
Nuclear decommissioning trust fund debt securities	1,882			517			1,365			—
Other trading and available-for-sale equity securities	98			98			—			—
Other trading and available-for-sale debt securities	320			85			230			5
Derivative assets	51			1			27			23
Total assets	6,005			4,186			1,623			196
Derivative liabilities	(369		)	(1		)	(368		)	—
Net assets	$	5,636		$	4,185		$	1,255		$	196



	December 31, 2014
(in millions)	Total Fair Value			Level 1			Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	3,650		$	3,493		$	6		$	151
Nuclear decommissioning trust fund debt securities	1,899			648			1,251			—
Other trading and available-for-sale equity securities	96			96			—			—
Other trading and available-for-sale debt securities	263			41			217			5
Derivative assets	110			49			24			37
Total assets	6,018			4,327			1,498			193
Derivative liabilities	(668		)	(162		)	(468		)	(38		)
Net assets	$	5,350		$	4,165		$	1,030		$	155

The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Amounts included in earnings for derivatives are primarily included in Operating Revenues.



	Three Months Ended June 30, 2015
(in millions)	Investments			Derivatives (net)			Total
Balance at beginning of period	$	169		$	14		$	183
Total pretax realized or unrealized gains (losses) included in earnings^(a)	—			(6		)	(6		)
Purchases, sales, issuances and settlements:
Purchases	3			24			27
Sales	(3		)	—			(3		)
Settlements	—			(12		)	(12		)
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	4			3			7
Balance at end of period	$	173		$	23		$	196


(a)	Includes amounts related to nonregulated operations and classified as (Loss) Income From Discontinued Operations, net of tax in Duke Energy's Condensed Consolidated Statements of Operations.



	Three Months Ended June 30, 2014
(in millions)	Investments			Derivatives (net)			Total
Balance at beginning of period	$	99		$	(14	)	$	85
Total pretax realized or unrealized gains (losses) included in earnings	—			(6		)	(6		)
Purchases, sales, issuances and settlements:
Purchases	15			51			66
Sales	(1		)	—			(1		)
Issuances	—			(1		)	(1		)
Settlements	—			(6		)	(6		)
Transfers out of Level 3 due to observability of inputs	68			2			70
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	7			(4		)	3
Balance at end of period	$	188		$	22		$	210
Pretax amounts included in the Condensed Consolidated Statements of Comprehensive Income related to Level 3 measurements outstanding	$	—		$	(25	)	$	(25	)



	Six Months Ended June 30, 2015
(in millions)	Investments			Derivatives (net)			Total
Balance at beginning of period	$	156		$	(1	)	$	155
Total pretax realized or unrealized gains (losses) included in earnings^(a)	—			18			18
Purchases, sales, issuances and settlements:
Purchases	12			24			36
Sales	(4		)	—			(4		)
Settlements	—			(22		)	(22		)
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	9			4			13
Balance at end of period	$	173		$	23		$	196


(a)	Includes amounts related to nonregulated operations and classified as (Loss) Income From Discontinued Operations, net of tax in Duke Energy's Condensed Consolidated Statements of Operations.



	Six Months Ended June 30, 2014
(in millions)	Investments			Derivatives (net)			Total
Balance at beginning of period	$	98		$	13		$	111
Total pretax realized or unrealized gains (losses) included in earnings	—			12			12
Purchases, sales, issuances and settlements:
Purchases	16			51			67
Sales	(2		)	—			(2		)
Issuances	—			(1		)	(1		)
Settlements	—			(45		)	(45		)
Transfers out of Level 3 due to observability of inputs	68			(3		)	65
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	8			(5		)	3
Balance at end of period	$	188		$	22		$	210
Pretax amounts included in the Condensed Consolidated Statements of Comprehensive Income related to Level 3 measurements outstanding	$	—		$	(25	)	$	(25	)

DUKE ENERGY CAROLINAS



	June 30, 2015
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	2,132		$	1,963	$	1		$	168
Nuclear decommissioning trust fund debt securities	967			158		809			—
Other trading and available-for-sale debt securities	3			—		—			3
Derivative assets	1			—		1			—
Total assets	3,103			2,121		811			171
Derivative liabilities	(19		)	—		(19		)	—
Net assets	$	3,084		$	2,121	$	792		$	171



	December 31, 2014
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	2,162		$	2,005	$	6		$	151
Nuclear decommissioning trust fund debt securities	870			138		732			—
Other trading and available-for-sale debt securities	3			—		—			3
Total assets	3,035			2,143		738			154
Derivative liabilities	(19		)	—		(19		)	—
Net assets	$	3,016		$	2,143	$	719		$	154

The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.



	Three Months Ended June 30, 2015
(in millions)	Investments			Derivatives (net)		Total
Balance at beginning of period	$	167		$	—	$	167
Purchases, sales, issuances and settlements:
Purchases	3			—		3
Issuances	(3		)	—		(3		)
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	4			—		4
Balance at end of period	$	171		$	—	$	171



	Three Months Ended June 30, 2014
(in millions)	Investments			Derivatives (net)			Total
Balance at beginning of period	$	82		$	(4	)	$	78
Purchases, sales, issuances and settlements:
Purchases	15			—			15
Sales	(1		)	—			(1		)
Settlements	—			1			1
Transfers out of Level 3 due to observability of inputs	68			—			68
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	7			—			7
Balance at end of period	$	171		$	(3	)	$	168



	Six Months Ended June 30, 2015
(in millions)	Investments			Derivatives (net)		Total
Balance at beginning of period	$	154		$	—	$	154
Purchases, sales, issuances and settlements:
Purchases	12			—		12
Issuances	(4		)	—		(4		)
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	9			—		9
Balance at end of period	$	171		$	—	$	171



	Six Months Ended June 30, 2014
(in millions)	Investments			Derivatives (net)			Total
Balance at beginning of period	$	81		$	(2	)	$	79
Purchases, sales, issuances and settlements:
Purchases	16			—			16
Issuances	(2		)	—			(2		)
Settlements	—			(1		)	(1		)
Transfers out of Level 3 to observability of inputs	68			—			68
Total gains (losses) included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	8			—			8
Balance at end of period	$	171		$	(3	)	$	168

PROGRESS ENERGY



	June 30, 2015
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	1,522		$	1,522	$	—		$	—
Nuclear decommissioning trust fund debt securities	915			359		556			—
Other trading and available-for-sale debt securities	61			20		41			—
Derivative assets	12			—		12			—
Total assets	2,510			1,901		609			—
Derivative liabilities	(296		)	—		(296		)	—
Net assets	$	2,214		$	1,901	$	313		$	—



	December 31, 2014
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	1,488		$	1,488	$	—		$	—
Nuclear decommissioning trust fund debt securities	1,029			510		519			—
Other trading and available-for-sale debt securities	58			15		43			—
Derivative assets	4			—		4			—
Total assets	2,579			2,013		566			—
Derivative liabilities	(373		)	—		(373		)	—
Net assets	$	2,206		$	2,013	$	193		$	—

The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.



	Derivatives (net)
	Three Months Ended June 30,					Six Months Ended June 30,
(in millions)	2015		2014			2015		2014
Balance at beginning of period	$	—	$	(3	)	$	—	$	—
Total pretax realized or unrealized gains included in earnings	—		3			—		—
Transfers out of Level 3 due to observability of inputs	—		2			—		2
Total gains included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	—		(2		)	—		(2		)
Balance at end of period	$	—	$	—		$	—	$	—

DUKE ENERGY PROGRESS



	June 30, 2015
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	1,198		$	1,198	$	—		$	—
Nuclear decommissioning trust fund debt securities	540			121		419			—
Other trading and available-for-sale debt securities	1			1		—			—
Derivative assets	2			—		2			—
Total assets	1,741			1,320		421			—
Derivative liabilities	(96		)	—		(96		)	—
Net assets	$	1,645		$	1,320	$	325		$	—



	December 31, 2014
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	1,171		$	1,171	$	—		$	—
Nuclear decommissioning trust fund debt securities	540			151		389			—
Total assets	1,711			1,322		389			—
Derivative liabilities	(132		)	—		(132		)	—
Net assets	$	1,579		$	1,322	$	257		$	—

The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.



	Derivatives (net)
	Three Months Ended June 30,					Six Months Ended June 30,
(in millions)	2015		2014			2015		2014
Balance at beginning of period	$	—	$	(3	)	$	—	$	—
Total pretax realized or unrealized gains included in earnings	—		3			—		—
Balance at end of period	$	—	$	—		$	—	$	—

DUKE ENERGY FLORIDA



	June 30, 2015
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	324		$	324	$	—		$	—
Nuclear decommissioning trust fund debt securities and other	375			238		137			—
Other trading and available-for-sale debt securities and other	49			9		40			—
Derivative assets	10			—		10			—
Total assets	758			571		187			—
Derivative liabilities	(195		)	—		(195		)	—
Net assets (liabilities)	$	563		$	571	$	(8	)	$	—



	December 31, 2014
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Nuclear decommissioning trust fund equity securities	$	317		$	317	$	—		$	—
Nuclear decommissioning trust fund debt securities and other	489			359		130			—
Other trading and available-for-sale debt securities and other	44			—		44			—
Derivative assets	4			—		4			—
Total assets	854			676		178			—
Derivative liabilities	(241		)	—		(241		)	—
Net assets (liabilities)	$	613		$	676	$	(63	)	$	—

DUKE ENERGY OHIO



	June 30, 2015
(in millions)	Total Fair Value			Level 1		Level 2			Level 3
Derivative assets	$	5		$	—	$	—		$	5
Derivative liabilities	(6		)	—		(6		)	—
Net liabilities	$	(1	)	$	—	$	(6	)	$	5



	December 31, 2014
(in millions)	Total Fair Value			Level 1			Level 2			Level 3
Derivative assets	$	49		$	20		$	9		$	20
Derivative liabilities	(181		)	(117		)	(26		)	(38		)
Net liabilities	$	(132	)	$	(97	)	$	(17	)	$	(18	)

The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.



	Derivatives (net)
	Three Months Ended June 30,						Six Months Ended June 30,
(in millions)	2015			2014			2015			2014
Balance at beginning of period	$	7		$	(19	)	$	(18	)	$	(4	)
Total pretax realized or unrealized gains (losses) included in earnings^(a)	(4		)	(13		)	21			(19		)
Purchases, sales, issuances and settlements:
Purchases	—			1			—			1
Sales	5			—			5			—
Settlements	(3		)	—			(3		)	(4		)
Total gains included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	—			2			—			2
Transfers out of Level 3 due to observability of inputs	—			1			—			(4		)
Balance at end of period	$	5		$	(28	)	$	5		$	(28	)
Pretax amounts included in the Condensed Consolidated Statements of Operations and Comprehensive Income related to Level 3 measurements outstanding at June 30, 2014	$	—		$	—		$	—		(27		)


(a)	Includes amounts related to nonregulated operations and classified as (Loss) Income From Discontinued Operations, net of tax in Duke Energy Ohio's Condensed Consolidated Statements of Operations and Comprehensive Income.

DUKE ENERGY INDIANA



	June 30, 2015
(in millions)	Total Fair Value		Level 1		Level 2		Level 3
Available-for-sale equity securities	$	73	$	73	$	—	$	—
Available-for-sale debt securities	30		—		30		—
Derivative assets	18		1		—		17
Net assets	$	121	$	74	$	30	$	17



	December 31, 2014
(in millions)	Total Fair Value		Level 1		Level 2		Level 3
Available-for-sale equity securities	$	71	$	71	$	—	$	—
Available-for-sale debt securities	30		—		30		—
Derivative assets	14		—		—		14
Net assets	$	115	$	71	$	30	$	14

The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements.



	Derivatives (net)
	Three Months Ended June 30,						Six Months Ended June 30,
(in millions)	2015			2014			2015			2014
Balance at beginning of period	$	3		$	7		$	14		$	12
Total pretax realized or unrealized gains (losses) included in earnings	—			—			—			27
Purchases, sales, issuances and settlements:
Purchases	18			49			18			49
Settlements	(10		)	(7		)	(19		)	(38		)
Total gains included on the Condensed Consolidated Balance Sheet as regulatory assets or liabilities	6			(4		)	4			(5		)
Balance at end of period	$	17		$	45		$	17		$	45

QUANTITATIVE DISCLOSURES ABOUT UNOBSERVABLE INPUTS

The following table includes quantitative information about the Duke Energy Registrants' derivatives classified as Level 3.



	June 30, 2015
Investment Type	Fair Value (in millions)		Valuation Technique	Unobservable Input	Range
Duke Energy
Swing options	1		Discounted cash flow	Forward capacity option curves – price per MMBtu	$	13.85		–	$	113.10
Financial transmission rights (FTRs)	22		RTO auction pricing	FTR price – per MWh	(1.72		)	–	8.85
Total Level 3 derivatives	$	23
Duke Energy Ohio
FTRs	5		RTO auction pricing	FTR price – per MWh	0.07			–	4.09
Duke Energy Indiana
FTRs	$	17	RTO auction pricing	FTR price – per MWh	(1.72		)	–	8.85



	December 31, 2014
Investment Type	Fair Value (in millions)			Valuation Technique	Unobservable Input	Range
Duke Energy
Natural gas contracts	$	(5	)	Discounted cash flow	Forward natural gas curves – price per MMBtu	$	2.12		–	$	4.35
Financial transmission rights (FTRs)	14			RTO auction pricing	FTR price – per MWh	(1.92		)	–	9.86
Electricity contracts	(1		)	Discounted cash flow	Forward electricity curves – price per MWh	25.16			–	51.75
Commodity capacity option contracts	2			Discounted cash flow	Forward capacity option curves – price per MW day	21.00			–	109.00
Commodity contract reserves	(11		)		Bid-ask spreads, implied volatility, probability of default
Total Level 3 derivatives	$	(1	)
Duke Energy Ohio
Electricity contracts	$	(6	)	Discounted cash flow	Forward electricity curves – price per MWh	25.25			–	51.75
Natural gas contracts	(5		)	Discounted cash flow	Forward natural gas curves – price per MMBtu	2.12			–	4.35
Commodity contract reserves	(7		)		Bid-ask spreads, implied volatility, probability of default
Total Level 3 derivatives	$	(18	)
Duke Energy Indiana
FTRs	$	14		RTO auction pricing	FTR price – per MWh	(1.92		)	–	9.86

OTHER FAIR VALUE DISCLOSURES

The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements.



	June 30, 2015				December 31, 2014
(in millions)	Book Value		Fair Value		Book Value		Fair Value
Duke Energy	$	39,169	$	42,276	$	40,020	$	44,566
Duke Energy Carolinas	8,885		9,695		8,391		9,626
Progress Energy	14,206		15,689		14,754		16,951
Duke Energy Progress	5,657		5,881		6,201		6,696
Duke Energy Florida	4,855		5,507		4,860		5,767
Duke Energy Ohio	1,605		1,760		1,766		1,970
Duke Energy Indiana	3,791		4,259		3,791		4,456

At both June 30, 2015 and December 31, 2014, the fair value of cash and cash equivalents, accounts and notes receivable, accounts payable, notes payable and commercial paper, and nonrecourse notes payable of variable interest entities are not materially different from their carrying amounts because of the short-term nature of these instruments and/or because the stated rates approximate market rates.