Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations:

	Remaining Performance Obligations
(in millions)	2018		2019		2020		2021		2022		Thereafter		Total
Progress Energy	$	47	$	112	$	121	$	80	$	82	$	81	$	523
Duke Energy Progress	4		9		9		9		9		18		58
Duke Energy Florida	43		103		112		71		73		63		465
Duke Energy Indiana	4		9		10		5		—		—		28

Estimated remaining performance obligations are as follows:

	Remaining Performance Obligations
(in millions)	2018		2019		2020		2021		2022		Thereafter		Total
Piedmont	$	36	$	71	$	69	$	65	$	64	$	462	$	767

Disaggregation of Revenue

Disaggregated revenues are presented as follows:

	Three Months Ended June 30, 2018
			Duke				Duke		Duke		Duke			Duke
(in millions)	Duke		Energy		Progress		Energy		Energy		Energy			Energy
By market or type of customer	Energy		Carolinas		Energy		Progress		Florida		Ohio			Indiana		Piedmont
Electric Utilities and Infrastructure
Residential	$	2,185	$	659	$	1,099	$	452	$	648	$	181		$	245	$	—
General	1,481		501		678		300		377		110			188		—
Industrial	736		286		224		159		66		33			192		—
Wholesale	515		115		322		287		34		2			77		—
Other revenues	194		85		96		47		50		23			20		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	5,111	$	1,646	$	2,419	$	1,245	$	1,175	$	349		$	722	$	—
Gas Utilities and Infrastructure
Residential	$	153	$	—	$	—	$	—	$	—	$	66		$	—	$	87
Commercial	87		—		—		—		—		28			—		59
Industrial	31		—		—		—		—		3			—		28
Power Generation	—		—		—		—		—		—			—		14
Other revenues	23		—		—		—		—		6			—		17
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	294	$	—	$	—	$	—	$	—	$	103		$	—	$	205
Commercial Renewables
Revenue from contracts with customers	$	47	$	—	$	—	$	—	$	—	$	—		$	—	$	—
Other
Revenue from contracts with customers	$	15	$	—	$	—	$	—	$	—	$	10		$	—	$	—
Total revenue from contracts with customers	$	5,467	$	1,646	$	2,419	$	1,245	$	1,175	$	462		$	722	$	205
Other revenue sources (a)	$	176	$	26	$	79	$	46	$	28	$	(3	)	$	16	$	10
Total revenues	$	5,643	$	1,672	$	2,498	$	1,291	$	1,203	$	459		$	738	$	215

	Six Months Ended June 30, 2018
			Duke				Duke		Duke		Duke		Duke
(in millions)	Duke		Energy		Progress		Energy		Energy		Energy		Energy
By market or type of customer	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Electric Utilities and Infrastructure
Residential	$	4,535	$	1,440	$	2,211	$	968	$	1,243	$	361	$	523	$	—
General	2,856		973		1,309		599		710		206		366		—
Industrial	1,400		541		432		304		128		63		365		—
Wholesale	1,148		234		768		684		84		2		145		—
Other revenues	333		152		225		132		93		37		37		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	10,272	$	3,340	$	4,945	$	2,687	$	2,258	$	669	$	1,436	$	—
Gas Utilities and Infrastructure
Residential	$	566	$	—	$	—	$	—	$	—	$	177	$	—	$	389
Commercial	288		—		—		—		—		77		—		211
Industrial	79		—		—		—		—		10		—		69
Power Generation	—		—		—		—		—		—		—		27
Other revenues	78		—		—		—		—		12		—		66
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	1,011	$	—	$	—	$	—	$	—	$	276	$	—	$	762
Commercial Renewables
Revenue from contracts with customers	$	80	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other
Revenue from contracts with customers	$	31	$	—	$	—	$	—	$	—	$	24	$	—	$	—
Total Revenue from contracts with customers	$	11,394	$	3,340	$	4,945	$	2,687	$	2,258	$	969	$	1,436	$	762
Other revenue sources(a)	$	384	$	95	$	129	$	64	$	60	$	14	$	33	$	6
Total revenues	$	11,778	$	3,435	$	5,074	$	2,751	$	2,318	$	983	$	1,469	$	768

(a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues.

Schedule Of Unbilled Revenues With Restricted Receivables

Unbilled revenues are included within Receivables and Receivables of VIEs on the Condensed Consolidated Balance Sheets as shown in the following table.

(in millions)	June 30, 2018		December 31, 2017
Duke Energy	$	876	$	944
Duke Energy Carolinas	315		342
Progress Energy	298		228
Duke Energy Progress	190		143
Duke Energy Florida	107		85
Duke Energy Ohio	2		4
Duke Energy Indiana	30		21
Piedmont	5		86

These receivables for unbilled revenues are shown in the table below.

(in millions)	June 30, 2018		December 31, 2017
Duke Energy Ohio	$	73	$	104
Duke Energy Indiana	123		132