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Revenue (Tables) | 12 Months Ended
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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 |

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