Derivatives and Hedging (Tables)

6 Months Ended

Jun. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Notional Amounts of Outstanding Derivative Positions

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

	June 30, 2017
			Duke				Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio
Cash flow hedges(a)	$	703	$	—	$	—	$	—	$	—	$	—
Undesignated contracts	927		400		500		250		250		27
Total notional amount	$	1,630	$	400	$	500	$	250	$	250	$	27

	December 31, 2016
			Duke				Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio
Cash flow hedges(a)	$	750	$	—	$	—	$	—	$	—	$	—
Undesignated contracts	927		400		500		250		250		27
Total notional amount	$	1,677	$	400	$	500	$	250	$	250	$	27

(a) Duke Energy includes amounts related to consolidated VIEs of $703 million and $750 million as of June 30, 2017 and December 31, 2016, respectively.

The tables below include 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.

	June 30, 2017
		Duke		Duke	Duke	Duke
	Duke	Energy	Progress	Energy	Energy	Energy
	Energy	Carolinas	Energy	Progress	Florida	Indiana	Piedmont
Electricity (gigawatt-hours)	178	—	—	—	—	178	—
Natural gas (millions of dekatherms)	791	92	202	106	96	2	495

	December 31, 2016
		Duke		Duke	Duke	Duke
	Duke	Energy	Progress	Energy	Energy	Energy
	Energy	Carolinas	Energy	Progress	Florida	Indiana	Piedmont
Electricity (gigawatt-hours)	147	—	—	—	—	147	—
Natural gas (millions of dekatherms)	890	91	269	118	151	1	529

Location And Fair Value Of Derivatives Recognized in the Condensed 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 Condensed 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	June 30, 2017
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current	$	76	$	7	$	11	$	7	$	4	$	3	$	54	$	2
Noncurrent	3		1		2		1		1		—		—		—
Total Derivative Assets – Commodity Contracts	$	79	$	8	$	13	$	8	$	5	$	3	$	54	$	2
Interest Rate Contracts
Designated as Hedging Instruments
Noncurrent	$	14	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Not Designated as Hedging Instruments
Current	2		—		2		—		1		—		—		—
Total Derivative Assets – Interest Rate Contracts	$	16	$	—	$	2	$	—	$	1	$	—	$	—	$	—
Total Derivative Assets	$	95	$	8	$	15	$	8	$	6	$	3	$	54	$	2

Derivative Liabilities	June 30, 2017
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current	$	40	$	1	$	21	$	2	$	19	$	—	$	—	$	18
Noncurrent	140		3		10		3		1		—		—		127
Total Derivative Liabilities – Commodity Contracts	$	180	$	4	$	31	$	5	$	20	$	—	$	—	$	145
Interest Rate Contracts
Designated as Hedging Instruments
Current	$	6	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Noncurrent	9		—		—		—		—		—		—		—
Not Designated as Hedging Instruments
Current	23		22		—		—		—		1		—		—
Noncurrent	9		—		4		3		—		4		—		—
Total Derivative Liabilities – Interest Rate Contracts	$	47	$	22	$	4	$	3	$	—	$	5	$	—	$	—
Total Derivative Liabilities	$	227	$	26	$	35	$	8	$	20	$	5	$	—	$	145

Derivative Assets	December 31, 2016
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current	$	108	$	23	$	61	$	35	$	26	$	4	$	16	$	3
Noncurrent	32		10		21		10		11		1		—		—
Total Derivative Assets – Commodity Contracts	$	140	$	33	$	82	$	45	$	37	$	5	$	16	$	3
Interest Rate Contracts
Designated as Hedging Instruments
Noncurrent	$	19	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Not Designated as Hedging Instruments
Current	3		—		3		1		2		—		—		—
Total Derivative Assets – Interest Rate Contracts	$	22	$	—	$	3	$	1	$	2	$	—	$	—	$	—
Total Derivative Assets	$	162	$	33	$	85	$	46	$	39	$	5	$	16	$	3

Derivative Liabilities	December 31, 2016
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Commodity Contracts
Not Designated as Hedging Instruments
Current	$	43	$	—	$	12	$	—	$	12	$	—	$	2	$	35
Noncurrent	166		1		7		1		—		—		—		152
Total Derivative Liabilities – Commodity Contracts	$	209	$	1	$	19	$	1	$	12	$	—	$	2	$	187
Interest Rate Contracts
Designated as Hedging Instruments
Current	$	8	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Noncurrent	8		—		—		—		—		—		—		—
Not Designated as Hedging Instruments															—
Current	1		—		—		—		—		1		—		—
Noncurrent	26		15		6		6		—		5		—		—
Total Derivative Liabilities – Interest Rate Contracts	$	43	$	15	$	6	$	6	$	—	$	6	$	—	$	—
Total Derivative Liabilities	$	252	$	16	$	25	$	7	$	12	$	6	$	2	$	187

Offsetting Assets

The following tables present the line items on the Condensed 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	June 30, 2017
				Duke					Duke		Duke			Duke		Duke
	Duke			Energy		Progress			Energy		Energy			Energy		Energy
(in millions)	Energy			Carolinas		Energy			Progress		Florida			Ohio		Indiana		Piedmont
Current
Gross amounts recognized	$	78		$	7	$	13		$	7	$	5		$	3	$	54	$	2
Gross amounts offset	(3		)	—		(4		)	—		(3		)	—		—		—
Net amounts presented in Current Assets: Other	$	75		$	7	$	9		$	7	$	2		$	3	$	54	$	2
Noncurrent
Gross amounts recognized	$	17		$	1	$	2		$	1	$	1		$	—	$	—	$	—
Gross amounts offset	(1		)	—		(1		)	—		(1		)	—		—		—
Net amounts presented in Other Noncurrent Assets: Other	$	16		$	1	$	1		$	1	$	—		$	—	$	—	$	—

Derivative Assets	December 31, 2016
				Duke						Duke			Duke			Duke		Duke
	Duke			Energy			Progress			Energy			Energy			Energy		Energy
(in millions)	Energy			Carolinas			Energy			Progress			Florida			Ohio		Indiana		Piedmont
Current
Gross amounts recognized	$	111		$	23		$	64		$	36		$	28		$	4	$	16	$	3
Gross amounts offset	(11		)	—			(11		)	—			(11		)	—		—		—
Net amounts presented in Current Assets: Other	$	100		$	23		$	53		$	36		$	17		$	4	$	16	$	3
Noncurrent
Gross amounts recognized	$	51		$	10		$	21		$	10		$	11		$	1	$	—	$	—
Gross amounts offset	(2		)	(1		)	(1		)	(1		)	—			—		—		—
Net amounts presented in Other Noncurrent Assets: Other	$	49		$	9		$	20		$	9		$	11		$	1	$	—	$	—

Offsetting Liabilities

Derivative Liabilities	December 31, 2016
				Duke						Duke			Duke			Duke		Duke
	Duke			Energy			Progress			Energy			Energy			Energy		Energy
(in millions)	Energy			Carolinas			Energy			Progress			Florida			Ohio		Indiana		Piedmont
Current
Gross amounts recognized	$	52		$	—		$	12		$	—		$	12		$	1	$	2	$	35
Gross amounts offset	(11		)	—			(11		)	—			(11		)	—		—		—
Net amounts presented in Current Liabilities: Other	$	41		$	—		$	1		$	—		$	1		$	1	$	2	$	35
Noncurrent
Gross amounts recognized	$	200		$	16		$	13		$	7		$	—		$	5	$	—	$	152
Gross amounts offset	(2		)	(1		)	(1		)	(1		)	—			—		—		—
Net amounts presented in Other Noncurrent Liabilities: Other	$	198		$	15		$	12		$	6		$	—		$	5	$	—	$	152

Derivative Liabilities	June 30, 2017
				Duke						Duke			Duke			Duke		Duke
	Duke			Energy			Progress			Energy			Energy			Energy		Energy
(in millions)	Energy			Carolinas			Energy			Progress			Florida			Ohio		Indiana		Piedmont
Current
Gross amounts recognized	$	69		$	23		$	21		$	2		$	19		$	1	$	—	$	18
Gross amounts offset	(4		)	(1		)	(4		)	(1		)	(3		)	—		—		—
Net amounts presented in Current Liabilities: Other	$	65		$	22		$	17		$	1		$	16		$	1	$	—	$	18
Noncurrent
Gross amounts recognized	$	158		$	3		$	14		$	6		$	1		$	4	$	—	$	127
Gross amounts offset	(2		)	(1		)	(1		)	(1		)	(1		)	—		—		—
Net amounts presented in Other Noncurrent Liabilities: Other	$	156		$	2		$	13		$	5		$	—		$	4	$	—	$	127

The following tables present the line items on the Condensed 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 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 Ohio, Duke Energy Indiana and Piedmont were not material.

	June 30, 2017
			Duke				Duke		Duke
	Duke		Energy		Progress		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida
Aggregate fair value of derivatives in a net liability position	$	51	$	25	$	26	$	7	$	19
Fair value of collateral already posted	—		—		—		—		—
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered	51		25		26		7		19

	December 31, 2016
			Duke				Duke		Duke
	Duke		Energy		Progress		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida
Aggregate fair value of derivatives in a net liability position	$	34	$	16	$	18	$	6	$	12
Fair value of collateral already posted	—		—		—		—		—
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered	34		16		18		6		12

The Duke Energy Registrants have elected to offset cash collateral and fair values of derivatives. For amounts to be netted, the derivative and cash collateral must be executed with the same counterparty under the same master netting arrangement.