Derivatives and Hedging (Tables)

12 Months Ended

Dec. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Notional Amounts of Outstanding Derivative Positions

The following table shows notional amounts for derivatives related to interest rate risk.

	December 31, 2015												December 31, 2014
			Duke				Duke		Duke		Duke						Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Duke		Progress		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Energy		Energy		Florida		Ohio
Cash flow hedges(a)	$	700	$	—	$	—	$	—	$	—	$	—	$	750	$	—	$	—	$	—
Undesignated contracts	1,827		400		500		250		250		27		277		250		250		27
Total notional amount	$	2,527	$	400	$	500	$	250	$	250	$	27	$	1,027	$	250	$	250	$	27

(a) Duke Energy includes amounts related to consolidated Variable Interest Entities (VIEs) of $497 million and $541 million at December 31, 2015 and 2014, respectively.

The tables below show information relating to volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown.

	December 31, 2015
		Duke		Duke	Duke	Duke	Duke
	Duke	Energy	Progress	Energy	Energy	Energy	Energy
	Energy	Carolinas	Energy	Progress	Florida	Ohio	Indiana
Electricity (gigawatt-hours)	70	—	—	—	—	34	36
Natural gas (millions of decatherms)	398	66	332	117	215	—	—

	December 31, 2014
		Duke		Duke	Duke	Duke	Duke
	Duke	Energy	Progress	Energy	Energy	Energy	Energy
	Energy	Carolinas	Energy	Progress	Florida	Ohio	Indiana
Electricity (gigawatt-hours)(a)(b)	25,370	—	—	—	—	19,141	—
Natural gas (millions of decatherms)(a)	676	35	328	116	212	313	—

(a) Duke Energy Ohio includes amounts related to the Disposal Group. Refer to Note 2 for further information on the sale.

(b) Amounts at Duke Energy Ohio include intercompany positions that eliminate at Duke Energy.

Location and Fair Value of Derivatives Recognized in the Consolidated Balance Sheets

The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown.

Derivative Assets	December 31, 2015
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana
Commodity Contracts
Not Designated as Hedging Instruments
Current	12		—		1		—		1		3		7
Noncurrent	4		—		4		—		4		—		—
Total Derivative Assets – Commodity Contracts	$	16	$	—	$	5	$	—	$	5	$	3	$	7
Interest Rate Contracts
Designated as Hedging Instruments
Noncurrent	$	4	$	—	$	—	$	—	$	—	$	—	$	—
Not Designated as Hedging Instruments
Current	6		—		6		2		2		—		—
Total Derivative Assets – Interest Rate Contracts	$	10	$	—	$	6	$	2	$	2	$	—	$	—
Total Derivative Assets	$	26	$	—	$	11	$	2	$	7	$	3	$	7

Derivative Liabilities	December 31, 2015
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana
Commodity Contracts
Not Designated as Hedging Instruments
Current	$	256	$	32	$	222	$	77	$	145	$	—	$	—
Noncurrent	100		8		92		16		71		—		—
Total Derivative Liabilities – Commodity Contracts	$	356	$	40	$	314	$	93	$	216	$	—	$	—
Interest Rate Contracts
Designated as Hedging Instruments
Current	$	11	$	—	$	—	$	—	$	—	$	—	$	—
Noncurrent	33		—		—		—		—		—		—
Not Designated as Hedging Instruments
Current	4		—		3		—		—		1		—
Noncurrent	15		5		5		5		—		6		—
Total Derivative Liabilities – Interest Rate Contracts	$	63	$	5	$	8	$	5	$	—	$	7	$	—
Total Derivative Liabilities	$	419	$	45	$	322	$	98	$	216	$	7	$	—

Derivative Assets	December 31, 2014
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana
Commodity Contracts
Not Designated as Hedging Instruments
Current Assets: Other	$	18	$	—	$	—	$	—	$	—	$	1	$	14
Current Assets: Assets held for sale	15		—		—		—		—		28		—
Investments and Other Assets: Other	3		—		—		—		—		—		—
Investments and Other Assets: Assets held for sale	15		—		—		—		—		26		—
Current Liabilities: Other	1		—		—		—		—		—		—
Current Liabilities: Assets held for sale	174		—		—		—		—		175		—
Deferred Credits and Other Liabilities: Other	2		—		—		—		—		—		—
Deferred Credits and Other Liabilities: Assets held for sale	111		—		—		—		—		111		—
Total Derivative Assets – Commodity Contracts	$	339	$	—	$	—	$	—	$	—	$	341	$	14
Interest Rate Contracts
Designated as Hedging Instruments
Investments and Other Assets: Other	10		—		—		—		—		—		—
Not Designated as Hedging Instruments
Current Assets: Other	2		—		2		—		2		—		—
Total Derivative Assets – Interest Rate Contracts	$	12	$	—	$	2	$	—	$	2	$	—	$	—
Total Derivative Assets	$	351	$	—	$	2	$	—	$	2	$	341	$	14

Derivative Liabilities	December 31, 2014
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana
Commodity Contracts
Designated as Hedging Instruments
Current Liabilities: Other	$	—	$	—	$	1	$	1	$	—	$	—	$	—
Not Designated as Hedging Instruments
Current Assets: Assets held for sale	—		—		—		—		—		4		—
Investments and Other Assets: Assets held for sale	—		—		—		—		—		4		—
Current Liabilities: Other	307		14		288		108		180		—		—
Current Liabilities: Assets held for sale	253		—		—		—		—		252		—
Deferred Credits and Other Liabilities: Other	91		5		80		23		57		—		—
Deferred Credits and Other Liabilities: Assets held for sale	208		—		—		—		—		207		—
Total Derivative Liabilities – Commodity Contracts	$	859	$	19	$	369	$	132	$	237	$	467	$	—
Interest Rate Contracts
Designated as Hedging Instruments
Current Liabilities: Other	$	13	$	—	$	—	$	—	$	—	$	—	$	—
Deferred Credits and Other Liabilities: Other	29		—		—		—		—		—		—
Not Designated as Hedging Instruments
Current Liabilities: Other	1		—		—		—		—		1		—
Deferred Credits and Other Liabilities: Other	7		—		2		—		2		5		—
Total Derivative Liabilities – Interest Rate Contracts	$	50	$	—	$	2	$	—	$	2	$	6	$	—
Total Derivative Liabilities	$	909	$	19	$	371	$	132	$	239	$	473	$	—

Offsetting Assets

Derivative Assets	December 31, 2014
				Duke					Duke		Duke			Duke			Duke
	Duke			Energy		Progress			Energy		Energy			Energy			Energy
(in millions)	Energy			Carolinas		Energy			Progress		Florida			Ohio			Indiana
Current(a)
Gross amounts recognized	$	210		$	—	$	2		$	—	$	2		$	204		$	14
Gross amounts offset	(153		)	—		(2		)	—		(2		)	(179		)	—
Net amounts subject to master netting	57			—		—			—		—			25			14
Amounts not subject to master netting	—			—		—			—		—			—			—
Net amounts recognized on the Condensed Consolidated Balance Sheet	$	57		$	—	$	—		$	—	$	—		$	25		$	14
Noncurrent(b)
Gross amounts recognized	$	136		$	—	$	—		$	—	$	—		$	137		$	—
Gross amounts offset	(88		)	—		—			—		—			(114		)	—
Net amounts subject to master netting	48			—		—			—		—			23			—
Amounts not subject to master netting	5			—		—			—		—			—			—
Net amounts recognized on the Condensed Consolidated Balance Sheet	$	53		$	—	$	—		$	—	$	—		$	23		$	—

(a) Amounts for Duke Energy Registrants, except Duke Energy and Duke Energy Ohio, are included in Other within Current Assets on the Condensed Consolidated Balance Sheets. Amounts for Duke Energy and Duke Energy Ohio are included in Other and Assets held for sale within Current Assets on the Condensed Consolidated Balance Sheets.

(b) Amounts for Duke Energy Registrants, except Duke Energy and Duke Energy Ohio, are included in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets. Amounts for Duke Energy and Duke Energy Ohio are included in Other and Assets held for sale within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

The following tables present the line items on the Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The Gross amounts offset in the tables below show the effect of these netting arrangements on financial position, and include collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below.

Derivative Assets	December 31, 2015
				Duke					Duke		Duke			Duke		Duke
	Duke			Energy		Progress			Energy		Energy			Energy		Energy
(in millions)	Energy			Carolinas		Energy			Progress		Florida			Ohio		Indiana
Current
Gross amounts recognized	$	18		$	—	$	7		$	2	$	3		$	3	$	7
Gross amounts offset	(3		)	—		(2		)	—		(2		)	—		—
Net amounts presented in Current Assets: Other	$	15		$	—	$	5		$	2	$	1		$	3	$	7
Noncurrent
Gross amounts recognized	$	8		$	—	$	4		$	—	$	4		$	—	$	—
Gross amounts offset	(4		)	—		(4		)	—		(4		)	—		—
Net amounts presented in Investments and Other Assets: Other	$	4		$	—	$	—		$	—	$	—		$	—	$	—

Offsetting Liabilities

Derivative Liabilities	December 31, 2015
				Duke					Duke			Duke			Duke		Duke
	Duke			Energy		Progress			Energy			Energy			Energy		Energy
(in millions)	Energy			Carolinas		Energy			Progress			Florida			Ohio		Indiana
Current
Gross amounts recognized	$	271		$	32	$	225		$	77		$	145		$	1	$	—
Gross amounts offset	(22		)	—		(21		)	(1		)	(20		)	—		—
Net amounts presented in Current Liabilities: Other	$	249		$	32	$	204		$	76		$	125		$	1	$	—
Noncurrent
Gross amounts recognized	$	148		$	13	$	97		$	21		$	71		$	6	$	—
Gross amounts offset	(16		)	—		(15		)	—			(15		)	—		—
Net amounts presented in Deferred Credits and Other Liabilities: Other	$	132		$	13	$	82		$	21		$	56		$	6	$	—

Derivative Liabilities	December 31, 2014
				Duke					Duke		Duke			Duke			Duke
	Duke			Energy		Progress			Energy		Energy			Energy			Energy
(in millions)	Energy			Carolinas		Energy			Progress		Florida			Ohio			Indiana
Current(c)
Gross amounts recognized	$	573		$	14	$	289		$	109	$	180		$	257		$	—
Gross amounts offset	(213		)	—		(17		)	—		(17		)	(222		)	—
Net amounts subject to master netting	360			14		272			109		163			35			—
Amounts not subject to master netting	1			—		—			—		—			—			—
Net amounts recognized on the Condensed Consolidated Balance Sheet	$	361		$	14	$	272		$	109	$	163		$	35		$	—
Noncurrent(d)
Gross amounts recognized	$	319		$	5	$	82		$	23	$	59		$	216		$	—
Gross amounts offset	(173		)	—		(8		)	—		(8		)	(193		)	—
Net amounts subject to master netting	146			5		74			23		51			23			—
Amounts not subject to master netting	16			—		—			—		—			—			—
Net amounts recognized on the Condensed Consolidated Balance Sheet	$	162		$	5	$	74		$	23	$	51		$	23		$	—

(c) Amounts for Duke Energy Registrants, except Duke Energy and Duke Energy Ohio, are included in Other within Current Liabilities on the Condensed Consolidated Balance Sheets. Amounts for Duke Energy and Duke Energy Ohio are included in Other and Liabilities associated with assets held for sale within Current Liabilities on the Condensed Consolidated Balance Sheets.

(d) Amounts for Duke Energy Registrants, except Duke Energy and Duke Energy Ohio, are included in Other within Deferred Credits and Other Liabilities on the Condensed Consolidated Balance Sheets. Amounts for Duke Energy and Duke Energy Ohio are included in Other and Liabilities associated with assets held for sale within Deferred Credits and Other Liabilities on the Condensed Consolidated Balance Sheets.

Derivative Contracts with Contingent Credit Features

The following tables show information with respect to derivative contracts that are in a net liability position and contain objective credit-risk-related payment provisions. Amounts for Duke Energy Indiana were not material.

	December 31, 2015
			Duke				Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio
Aggregate fair value of derivatives in a net liability position	$	334	$	45	$	290	$	93	$	194	$	—
Fair value of collateral already posted	30		—		30		—		30		—
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered	304		45		260		93		164		—

	December 31, 2014
			Duke				Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio(a)
Aggregate fair value of derivatives in a net liability position	$	845	$	19	$	370	$	131	$	239	$	456
Fair value of collateral already posted	209		—		23		—		23		186
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered	407		19		347		131		216		41

(a)    Duke Energy Ohio includes amounts related to the Disposal Group for the year ended December 31, 2014.

The Duke Energy Registrants have elected to offset cash collateral and fair values of derivatives. For amounts to be netted, the derivative must be executed with the same counterparty under the same master netting arrangement. Amounts disclosed below represent the receivables related to the right to reclaim cash collateral under master netting arrangements.

	December 31, 2015		December 31, 2014
(in millions)	Receivables		Receivables
Duke Energy
Amounts offset against net derivative positions	$	30	$	145
Amounts not offset against net derivative positions	—		64
Progress Energy
Amounts offset against net derivative positions	30		23
Duke Energy Florida
Amounts offset against net derivative positions	30		23
Duke Energy Ohio
Amounts offset against net derivative positions	—		122
Amounts not offset against net derivative positions	—		64