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Revenue (Tables)
 12 Months Ended
Dec. 31, 2020
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)20212022202320242025ThereafterTotal
Progress Energy$93 $107 $44 $45 $7 $51 $347 
Duke Energy Progress8 8 8 8 — — 32 
Duke Energy Florida85 99 36 37 7 51 315 
Duke Energy Indiana5 — 7 12 12 24 60 
Estimated remaining performance obligations are as follows:
Remaining Performance Obligations
(in millions)20212022202320242025ThereafterTotal
Piedmont$65 $64 $61 $59 $58 $319 $626 
Disaggregation of Revenue Disaggregated revenues are presented as follows:
Year Ended December 31, 2020
DukeDukeDukeDukeDuke
(in millions)DukeEnergyProgressEnergyEnergyEnergyEnergy
By market or type of customerEnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Electric Utilities and Infrastructure
Residential$9,806 $2,997 $5,017 $2,059 $2,958 $726 $1,064 $— 
General6,194 2,233 2,779 1,312 1,467 442 740 — 
Industrial2,859 1,137 901 649 252 137 683 — 
Wholesale1,864 380 1,228 1,034 194 32 224 — 
Other revenues914 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 
Commercial446 — — — — 117 — 329 
Industrial127 — — — — 17 — 110 
Power Generation— — — — — — — 34 
Other revenues87 — — — — 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
DukeDukeDukeDukeDuke
(in millions)DukeEnergyProgressEnergyEnergyEnergyEnergy
By market or type of customerEnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Electric Utilities and Infrastructure
Residential$9,863 $3,044 $4,998 $2,144 $2,854 $733 $1,087 $— 
General6,431 2,244 2,935 1,368 1,567 451 802 — 
Industrial3,071 1,215 934 675 259 147 774 — 
Wholesale2,212 462 1,468 1,281 187 46 235 — 
Other revenues770 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 
Commercial508 — — — — 130 — 378 
Industrial141 — — — — 19 — 122 
Power Generation— — — — — — — 51 
Other revenues129 — — — — 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.
Year Ended December 31, 2018
DukeDukeDukeDukeDuke
(in millions)DukeEnergyProgressEnergyEnergyEnergyEnergy
By market or type of customerEnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Electric Utilities and Infrastructure
Residential$9,587 $2,981 $4,785 $2,019 $2,766 $743 $1,076 $— 
General6,127 2,119 2,809 1,280 1,529 422 778 — 
Industrial2,974 1,180 904 642 262 131 760 — 
Wholesale2,324 508 1,462 1,303 159 57 298 — 
Other revenues717 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 
Commercial514 — — — — 135 — 378 
Industrial147 — — — — 18 — 128 
Power Generation— — — — — — — 54 
Other revenues139 — — — — 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.
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.
Year Ended December 31, 2020
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Balance at December 31, 2019$76 $10 $16 $8 $7 $4 $3 $6 
Cumulative Change in Accounting Principle5 1 2 1 1 — — 1 
Write-Offs(58)(13)(23)(8)(14)— — (6)
Credit Loss Expense75 13 29 9 20 — — 11 
Other Adjustments48 12 13 13 — — — — 
Balance at December 31, 2020$146 $23 $37 $23 $14 $4 $3 $12 
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, 2020
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Unbilled Receivables$969 $328 $283 $167 $116 $2 $16 $86 
0-30 days1,789 445 707 398 307 60 26 149 
30-60 days185 80 54 25 29 8 3 8 
60-90 days22 1 10 4 6 2 1 3 
90+ days119 16 32 9 23 30 12 9 
Deferred Payment Arrangements(a)
215 96 80 52 28 — — 7 
Trade and Other Receivables$3,299 $966 $1,166 $655 $509 $102 $58 $262 
(a)    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.
Schedule Of Unbilled Revenues With Restricted Receivables
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)20202019
Duke Energy$969 $843 
Duke Energy Carolinas328 298 
Progress Energy283 217 
Duke Energy Progress167 122 
Duke Energy Florida116 95 
Duke Energy Ohio2 1 
Duke Energy Indiana16 16 
Piedmont86 78 
These receivables for unbilled revenues are shown in the table below.
December 31,
(in millions)20202019
Duke Energy Ohio$87 $82 
Duke Energy Indiana134 115