Revenue (Tables)

12 Months Ended

Dec. 31, 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)	2019		2020		2021		2022		2023		Thereafter		Total
Progress Energy	$	112	$	121	$	80	$	82	$	39	$	42	$	476
Duke Energy Progress	9		9		9		9		9		9		54
Duke Energy Florida	103		112		71		73		30		33		422
Duke Energy Indiana	9		10		5		—		—		—		24

Estimated remaining performance obligations are as follows:

	Remaining Performance Obligations
(in millions)	2019		2020		2021		2022		2023		Thereafter		Total
Piedmont	$	70	$	68	$	63	$	63	$	60	$	430	$	754

Disaggregation of Revenue

Disaggregated revenues are presented as follows:

	Year Ended December 31, 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	$	9,587	$	2,981	$	4,785	$	2,019	$	2,766	$	743	$	1,076	$	—
General	6,127		2,119		2,809		1,280		1,529		422		778		—
Industrial	2,974		1,180		904		642		262		131		760		—
Wholesale	2,324		508		1,462		1,303		159		57		298		—
Other revenues	717		320		502		320		182		73		91		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	21,729	$	7,108	$	10,462	$	5,564	$	4,898	$	1,426	$	3,003	$	—
Gas Utilities and Infrastructure
Residential	$	1,000	$	—	$	—	$	—	$	—	$	331	$	—	$	669
Commercial	514		—		—		—		—		135		—		378
Industrial	147		—		—		—		—		18		—		128
Power Generation	—		—		—		—		—		—		—		54
Other revenues	139		—		—		—		—		19		—		120
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	1,800	$	—	$	—	$	—	$	—	$	503	$	—	$	1,349
Commercial Renewables
Revenue from contracts with customers	$	209	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other
Revenue from contracts with customers	$	19	$	—	$	—	$	—	$	—	$	1	$	—	$	—
Total revenue from contracts with customers	$	23,757	$	7,108	$	10,462	$	5,564	$	4,898	$	1,930	$	3,003	$	1,349
Other revenue sources(a)	$	764	$	192	$	266	$	135	$	123	$	27	$	56	$	26
Total revenues	$	24,521	$	7,300	$	10,728	$	5,699	$	5,021	$	1,957	$	3,059	$	1,375

(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

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

	December 31,
(in millions)	2018		2017
Duke Energy Ohio	$	86	$	104
Duke Energy Indiana	128		132

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

	December 31,
(in millions)	2018		2017
Duke Energy	$	896	$	944
Duke Energy Carolinas	313		342
Progress Energy	244		228
Duke Energy Progress	148		143
Duke Energy Florida	96		85
Duke Energy Ohio	2		4
Duke Energy Indiana	23		21
Piedmont	73		86