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Revenue | 3 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
Revenue | REVENUE Duke Energy earns substantially all of its revenues through its reportable segments, Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables. Electric Utilities and Infrastructure Electric Utilities and Infrastructure earns the majority of its revenues through retail and wholesale electric service through the generation, transmission, distribution and sale of electricity. Duke Energy generally provides retail and wholesale electric service customers with their full electric load requirements or with supplemental load requirements when the customer has other sources of electricity. The majority of wholesale revenues are full requirements contracts where the customers purchase the substantial majority of their energy needs and do not have a fixed quantity of contractually required energy or capacity. As such, related forecasted revenues are considered optional purchases. 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 | $ | 86 |  | $ | 121 |  | $ | 87 |  | $ | 82 |  | $ | 39 |  | $ | 42 |  | $ | 457 |
Duke Energy Progress | 7 |  | 9 |  | 9 |  | 9 |  | 9 |  | 9 |  | 52 |
Duke Energy Florida | 79 |  | 112 |  | 78 |  | 73 |  | 30 |  | 33 |  | 405 |
Duke Energy Indiana | 7 |  | 10 |  | 5 |  | — |  | — |  | — |  | 22 |
Revenues for block sales are recognized monthly as energy is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Gas Utilities and Infrastructure Gas Utilities and Infrastructure earns its revenues through retail and wholesale natural gas service through the transportation, distribution and sale of natural gas. Duke Energy generally provides retail and wholesale natural gas service customers with all natural gas load requirements. Additionally, while natural gas can be stored, substantially all natural gas provided by Duke Energy is consumed by customers simultaneously with receipt of delivery. Fixed capacity payments under long-term contracts for the Gas Utilities and Infrastructure segment include minimum margin contracts and supply arrangements with municipalities and power generation facilities. Revenues for related sales are recognized monthly as natural gas is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Estimated remaining performance obligations are as follows:
| Remaining Performance Obligations
(in millions) | 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | Thereafter |  | Total |
Piedmont | $ | 53 |  | $ | 69 |  | $ | 65 |  | $ | 64 |  | $ | 61 |  | $ | 431 |  | $ | 743 |
Commercial Renewables Commercial Renewables earns the majority of its revenues through long-term PPAs and generally sells all of its wind and solar facility output, electricity and RECs to customers. The majority of these PPAs have historically been accounted for as leases. For PPAs that are not accounted for as leases, the delivery of electricity and the delivery of RECs are considered separate performance obligations. Other The remainder of Duke Energy’s operations is presented as Other, which does not include material revenues from contracts with customers. Disaggregated Revenues Disaggregated revenues are presented as follows:
| Three Months Ended March 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 | $ | 2,370 |  | $ | 760 |  | $ | 1,114 |  | $ | 536 |  | $ | 578 |  | $ | 189 |  | $ | 306 |  | $ | — |
General | 1,427 |  | 496 |  | 632 |  | 306 |  | 326 |  | 103 |  | 197 |  | — |
Industrial | 711 |  | 266 |  | 222 |  | 161 |  | 61 |  | 33 |  | 190 |  | — |
Wholesale | 541 |  | 119 |  | 353 |  | 315 |  | 38 |  | 14 |  | 54 |  | — |
Other revenues | 172 |  | 78 |  | 172 |  | 125 |  | 47 |  | 16 |  | 17 |  | — |
Total Electric Utilities and Infrastructure revenue from contracts with customers | $ | 5,221 |  | $ | 1,719 |  | $ | 2,493 |  | $ | 1,443 |  | $ | 1,050 |  | $ | 355 |  | $ | 764 |  | $ | — |
Gas Utilities and Infrastructure |  |  |  |  |  |  |  |
Residential | $ | 414 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 112 |  | $ | — |  | $ | 302 |
Commercial | 206 |  | — |  | — |  | — |  | — |  | 49 |  | — |  | 157 |
Industrial | 48 |  | — |  | — |  | — |  | — |  | 7 |  | — |  | 42 |
Power Generation | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 13 |
Other revenues | 63 |  | — |  | — |  | — |  | — |  | 8 |  | — |  | 56 |
Total Gas Utilities and Infrastructure revenue from contracts with customers | $ | 731 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 176 |  | $ | — |  | $ | 570 |
Commercial Renewables |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 42 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |
Other |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 4 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |
Total revenue from contracts with customers | $ | 5,998 |  | $ | 1,719 |  | $ | 2,493 |  | $ | 1,443 |  | $ | 1,050 |  | $ | 531 |  | $ | 764 |  | $ | 570 |
Other revenue sources(a) | $ | 165 |  | $ | 25 |  | $ | 79 |  | $ | 41 |  | $ | 36 |  | $ | — |  | $ | 4 |  | $ | 9 |
Total revenues | $ | 6,163 |  | $ | 1,744 |  | $ | 2,572 |  | $ | 1,484 |  | $ | 1,086 |  | $ | 531 |  | $ | 768 |  | $ | 579 |
| Three Months Ended March 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 | $ | 2,350 |  | $ | 781 |  | $ | 1,112 |  | $ | 516 |  | $ | 595 |  | $ | 180 |  | $ | 278 |  | $ | — |
General | 1,375 |  | 472 |  | 631 |  | 299 |  | 333 |  | 96 |  | 178 |  | — |
Industrial | 664 |  | 255 |  | 208 |  | 145 |  | 62 |  | 30 |  | 173 |  | — |
Wholesale | 633 |  | 119 |  | 446 |  | 397 |  | 50 |  | — |  | 68 |  | — |
Other revenues | 139 |  | 67 |  | 129 |  | 85 |  | 43 |  | 14 |  | 17 |  | — |
Total Electric Utilities and Infrastructure revenue from contracts with customers | $ | 5,161 |  | $ | 1,694 |  | $ | 2,526 |  | $ | 1,442 |  | $ | 1,083 |  | $ | 320 |  | $ | 714 |  | $ | — |
Gas Utilities and Infrastructure |  |  |  |  |  |  |  |
Residential | $ | 413 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 111 |  | $ | — |  | $ | 302 |
Commercial | 201 |  | — |  | — |  | — |  | — |  | 49 |  | — |  | 152 |
Industrial | 48 |  | — |  | — |  | — |  | — |  | 7 |  | — |  | 41 |
Power Generation | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 13 |
Other revenues | 55 |  | — |  | — |  | — |  | — |  | 6 |  | — |  | 49 |
Total Gas Utilities and Infrastructure revenue from contracts with customers | $ | 717 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 173 |  | $ | — |  | $ | 557 |
Commercial Renewables |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 33 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | — |
Other |  |  |  |  |  |  |  |
Revenue from contracts with customers | $ | 17 |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 14 |  | $ | — |  | $ | — |
Total revenue from contracts with customers | $ | 5,928 |  | $ | 1,694 |  | $ | 2,526 |  | $ | 1,442 |  | $ | 1,083 |  | $ | 507 |  | $ | 714 |  | $ | 557 |
Other revenue sources(a) | $ | 207 |  | $ | 69 |  | $ | 50 |  | $ | 18 |  | $ | 32 |  | $ | 17 |  | $ | 17 |  | $ | (4 | )
Total revenues | $ | 6,135 |  | $ | 1,763 |  | $ | 2,576 |  | $ | 1,460 |  | $ | 1,115 |  | $ | 524 |  | $ | 731 |  | $ | 553 |
(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.
UNBILLED REVENUE Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed. Unbilled revenues can vary significantly from period to period as a result of seasonality, weather, customer usage patterns, customer mix, average price in effect for customer classes, timing of rendering customer bills and meter reading schedules, and the impact of weather normalization or margin decoupling mechanisms. Unbilled revenues are included within Receivables and Receivables of VIEs on the Condensed Consolidated Balance Sheets as shown in the following table.
(in millions) | March 31, 2019 |  |  | December 31, 2018 |
Duke Energy | $ | 733 |  |  | $ | 896 |
Duke Energy Carolinas | 281 |  |  | 313 |
Progress Energy | 193 |  |  | 244 |
Duke Energy Progress | 108 |  |  | 148 |
Duke Energy Florida | 85 |  |  | 96 |
Duke Energy Ohio | 1 |  |  | 2 |
Duke Energy Indiana | 18 |  |  | 23 |
Piedmont | 38 |  |  | 73 |
Additionally, 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 Condensed Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 13 for further information. These receivables for unbilled revenues are shown in the table below.
(in millions) | March 31, 2019 |  |  | December 31, 2018 |
Duke Energy Ohio | $ | 62 |  |  | $ | 86 |
Duke Energy Indiana | 109 |  |  | 128 |

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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