Revenue (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

Estimated remaining performance obligations are as follows:

	Remaining Performance Obligations
(in millions)	2018		2019		2020		2021		2022		Thereafter		Total
Piedmont	$	18	$	71	$	70	$	65	$	64	$	462	$	750

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	$	24	$	112	$	121	$	80	$	82	$	81	$	500
Duke Energy Progress	2		9		9		9		9		18		56
Duke Energy Florida	22		103		112		71		73		63		444
Duke Energy Indiana	2		9		10		5		—		—		26

Disaggregation of Revenue

Disaggregated revenues are presented as follows:

	Three Months Ended September 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	$	2,729	$	823	$	1,425	$	572	$	853	$	203	$	279	$	—
General	1,763		635		800		373		427		112		218		—
Industrial	835		352		246		177		69		33		202		—
Wholesale	589		132		372		335		37		3		81		—
Other revenues	225		109		134		90		44		20		29		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	6,141	$	2,051	$	2,977	$	1,547	$	1,430	$	371	$	809	$	—
Gas Utilities and Infrastructure
Residential	$	116	$	—	$	—	$	—	$	—	$	59	$	—	$	57
Commercial	66		—		—		—		—		20		—		46
Industrial	28		—		—		—		—		3		—		24
Power Generation	—		—		—		—		—		—		—		13
Other revenues	23		—		—		—		—		1		—		22
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	233	$	—	$	—	$	—	$	—	$	83	$	—	$	162
Commercial Renewables
Revenue from contracts with customers	$	61	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other
Revenue from contracts with customers	$	16	$	—	$	—	$	—	$	—	$	12	$	—	$	—
Total revenue from contracts with customers	$	6,451	$	2,051	$	2,977	$	1,547	$	1,430	$	466	$	809	$	162
Other revenue sources(a)	$	177	$	39	$	68	$	35	$	32	$	3	$	10	$	10
Total revenues	$	6,628	$	2,090	$	3,045	$	1,582	$	1,462	$	469	$	819	$	172

	Nine Months Ended September 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	$	7,264	$	2,263	$	3,636	$	1,540	$	2,096	$	564	$	802	$	—
General	4,619		1,608		2,109		972		1,137		318		584		—
Industrial	2,235		893		678		481		197		96		567		—
Wholesale	1,737		366		1,140		1,019		121		5		226		—
Other revenues	558		261		359		222		137		57		66		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	16,413	$	5,391	$	7,922	$	4,234	$	3,688	$	1,040	$	2,245	$	—
Gas Utilities and Infrastructure
Residential	$	682	$	—	$	—	$	—	$	—	$	236	$	—	$	446
Commercial	354		—		—		—		—		97		—		257
Industrial	107		—		—		—		—		13		—		93
Power Generation	—		—		—		—		—		—		—		40
Other revenues	101		—		—		—		—		13		—		88
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	1,244	$	—	$	—	$	—	$	—	$	359	$	—	$	924
Commercial Renewables
Revenue from contracts with customers	$	141	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other
Revenue from contracts with customers	$	47	$	—	$	—	$	—	$	—	$	36	$	—	$	—
Total Revenue from contracts with customers	$	17,845	$	5,391	$	7,922	$	4,234	$	3,688	$	1,435	$	2,245	$	924
Other revenue sources(a)	$	561	$	134	$	197	$	99	$	92	$	17	$	43	$	16
Total revenues	$	18,406	$	5,525	$	8,119	$	4,333	$	3,780	$	1,452	$	2,288	$	940

(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)	September 30, 2018		December 31, 2017
Duke Energy	$	802	$	944
Duke Energy Carolinas	278		342
Progress Energy	283		228
Duke Energy Progress	163		143
Duke Energy Florida	120		85
Duke Energy Ohio	2		4
Duke Energy Indiana	25		21
Piedmont	3		86

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

(in millions)	September 30, 2018		December 31, 2017
Duke Energy Ohio	$	68	$	104
Duke Energy Indiana	121		132