Revenue (Tables)

12 Months Ended

Dec. 31, 2021

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)	2022		2023		2024		2025		2026		Thereafter		Total
Progress Energy	$	109	$	53	$	45	$	7	$	7	$	43	$	264
Duke Energy Progress	8		8		8		—		—		—		24
Duke Energy Florida	101		45		37		7		7		43		240
Duke Energy Indiana	1		9		14		14		14		12		64

Estimated remaining performance obligations are as follows:

	Remaining Performance Obligations
(in millions)	2022		2023		2024		2025		2026		Thereafter		Total
Piedmont	$	71	$	64	$	61	$	60	$	50	$	286	$	592

Disaggregation of Revenue

Disaggregated revenues are presented as follows:

	Year Ended December 31, 2021
			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	$	10,097	$	3,054	$	5,084	$	2,156	$	2,928	$	767	$	1,188	$	—
General	6,375		2,210		2,883		1,378		1,505		440		825		—
Industrial	2,924		1,145		894		634		260		135		750		—
Wholesale	2,199		472		1,385		1,164		221		56		285		—
Other revenues	879		264		716		387		329		83		86		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	22,474	$	7,145	$	10,962	$	5,719	$	5,243	$	1,481	$	3,134	$	—
Gas Utilities and Infrastructure
Residential	$	1,131	$	—	$	—	$	—	$	—	$	354	$	—	$	777
Commercial	561		—		—		—		—		143		—		418
Industrial	158		—		—		—		—		20		—		137
Power Generation	—		—		—		—		—		—		—		92
Other revenues	133		—		—		—		—		28		—		45
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	1,983	$	—	$	—	$	—	$	—	$	545	$	—	$	1,469
Commercial Renewables
Revenue from contracts with customers	$	217	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other
Revenue from contracts with customers	$	29	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Total revenue from contracts with customers	$	24,703	$	7,145	$	10,962	$	5,719	$	5,243	$	2,026	$	3,134	$	1,469
Other revenue sources(a)	$	394	$	(43)	$	95	$	61	$	16	$	11	$	40	$	100
Total revenues	$	25,097	$	7,102	$	11,057	$	5,780	$	5,259	$	2,037	$	3,174	$	1,569

(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.

	Year Ended December 31, 2020
			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	$	9,806	$	2,997	$	5,017	$	2,059	$	2,958	$	726	$	1,064	$	—
General	6,194		2,233		2,779		1,312		1,467		442		740		—
Industrial	2,859		1,137		901		649		252		137		683		—
Wholesale	1,864		380		1,228		1,034		194		32		224		—
Other revenues	914		281		596		294		302		82		72		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	21,637	$	7,028	$	10,521	$	5,348	$	5,173	$	1,419	$	2,783	$	—
Gas Utilities and Infrastructure
Residential	$	930	$	—	$	—	$	—	$	—	$	300	$	—	$	630
Commercial	446		—		—		—		—		117		—		329
Industrial	127		—		—		—		—		17		—		110
Power Generation	—		—		—		—		—		—		—		34
Other revenues	87		—		—		—		—		17		—		70
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	1,590	$	—	$	—	$	—	$	—	$	451	$	—	$	1,173
Commercial Renewables
Revenue from contracts with customers	$	227	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other
Revenue from contracts with customers	$	26	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Total revenue from contracts with customers	$	23,480	$	7,028	$	10,521	$	5,348	$	5,173	$	1,870	$	2,783	$	1,173
Other revenue sources(a)	$	388	$	(13)	$	106	$	74	$	15	$	(12)	$	12	$	124
Total revenues	$	23,868	$	7,015	$	10,627	$	5,422	$	5,188	$	1,858	$	2,795	$	1,297

(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.

	Year Ended December 31, 2019
			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	$	9,863	$	3,044	$	4,998	$	2,144	$	2,854	$	733	$	1,087	$	—
General	6,431		2,244		2,935		1,368		1,567		451		802		—
Industrial	3,071		1,215		934		675		259		147		774		—
Wholesale	2,212		462		1,468		1,281		187		46		235		—
Other revenues	770		276		548		317		231		80		89		—
Total Electric Utilities and Infrastructure revenue from contracts with customers	$	22,347	$	7,241	$	10,883	$	5,785	$	5,098	$	1,457	$	2,987	$	—
Gas Utilities and Infrastructure
Residential	$	976	$	—	$	—	$	—	$	—	$	315	$	—	$	661
Commercial	508		—		—		—		—		130		—		378
Industrial	141		—		—		—		—		19		—		122
Power Generation	—		—		—		—		—		—		—		51
Other revenues	129		—		—		—		—		19		—		110
Total Gas Utilities and Infrastructure revenue from contracts with customers	$	1,754	$	—	$	—	$	—	$	—	$	483	$	—	$	1,322
Commercial Renewables
Revenue from contracts with customers	$	223	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Other
Revenue from contracts with customers	$	24	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Total revenue from contracts with customers	$	24,348	$	7,241	$	10,883	$	5,785	$	5,098	$	1,940	$	2,987	$	1,322
Other revenue sources(a)	$	731	$	154	$	319	$	172	$	133	$	—	$	17	$	59
Total revenues	$	25,079	$	7,395	$	11,202	$	5,957	$	5,231	$	1,940	$	3,004	$	1,381

(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.

Accounts Receivable, Allowance for Credit Loss

The following table presents the reserve for credit losses for trade and other receivables based on adoption of the new standard.

	Years Ended December 31, 2020 and 2021
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Balance at December 31, 2019	$	76	$	10	$	16	$	8	$	7	$	4	$	3	$	6
Cumulative Change in Accounting Principle	5		1		2		1		1		—		—		1
Write-Offs	(58)		(13)		(23)		(8)		(14)		—		—		(6)
Credit Loss Expense	75		13		29		9		20		—		—		11
Other Adjustments	48		12		13		13		—		—		—		—
Balance at December 31, 2020	$	146	$	23	$	37	$	23	$	14	$	4	$	3	$	12
Write-Offs	(58)		(21)		(25)		(12)		(13)		—		—		(9)
Credit Loss Expense	54		27		25		11		14		—		—		7
Other Adjustments	(20)		13		(1)		(1)		1		—		—		5
Balance at December 31, 2021	$	122	$	42	$	36	$	21	$	16	$	4	$	3	$	15

Financing Receivable, Past Due

The aging of trade receivables is presented in the table below. Duke Energy considers receivables greater than 30 days outstanding past due.

	December 31, 2021
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Unbilled Receivables(a)(b)	$	964	$	316	$	266	$	193	$	73	$	4	$	27	$	106
0-30 days	2,104		595		800		405		393		42		51		202
30-60 days	212		77		72		44		28		4		13		12
60-90 days	88		37		41		21		20		1		1		2
90+ days	249		106		65		37		28		47		11		7
Deferred Payment Arrangements(c)	115		55		45		22		23		2		—		4
Trade and Other Receivables	$	3,732	$	1,186	$	1,289	$	722	$	565	$	100	$	103	$	333

	December 31, 2020
			Duke				Duke		Duke		Duke		Duke
	Duke		Energy		Progress		Energy		Energy		Energy		Energy
(in millions)	Energy		Carolinas		Energy		Progress		Florida		Ohio		Indiana		Piedmont
Unbilled Receivables(a)(b)	$	969	$	328	$	283	$	167	$	116	$	2	$	16	$	86
0-30 days	1,789		445		707		398		307		60		26		149
30-60 days	185		80		54		25		29		8		3		8
60-90 days	22		1		10		4		6		2		1		3
90+ days	119		16		32		9		23		30		12		9
Deferred Payment Arrangements(c)	215		96		80		52		28		—		—		7
Trade and Other Receivables	$	3,299	$	966	$	1,166	$	655	$	509	$	102	$	58	$	262

(a)    Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed and are included within Receivables and Receivables of VIEs on the Consolidated Balance Sheets.

(b)    Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC, and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 17 for further information. These receivables for unbilled revenues are $82 million and $121 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2021, and $87 million and $134 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2020.

(c)    Due to certain customer financial hardships created by the COVID-19 pandemic and resulting stay-at-home orders, Duke Energy permitted customers to defer payment of past-due amounts through an installment payment plan over a period of several months.