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Joint Ownership of Generating and Transmission Facilities | 12 Months Ended
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Dec. 31, 2018
Joint Ownership Of Generating And Transmission Facilities [Abstract] |
Joint Ownership of Generating and Transmission Facilities | JOINT OWNERSHIP OF GENERATING AND TRANSMISSION FACILITIES The Duke Energy Registrants maintain ownership interests in certain jointly owned generating and transmission facilities. The Duke Energy Registrants are entitled to a share of the generating capacity and output of each unit equal to their respective ownership interests. The Duke Energy Registrants pay their ownership share of additional construction costs, fuel inventory purchases and operating expenses. The Duke Energy Registrants share of revenues and operating costs of the jointly owned facilities is included within the corresponding line in the Consolidated Statements of Operations. Each participant in the jointly owned facilities must provide its own financing. The following table presents the Duke Energy Registrants' interest of jointly owned plant or facilities and amounts included on the Consolidated Balance Sheets. All facilities are operated by the Duke Energy Registrants and are included in the Electric Utilities and Infrastructure segment.
| December 31, 2018
|  |  |  |  |  |  | Construction |
| Ownership |  |  | Property, Plant |  |  | Accumulated |  |  | Work in |
(in millions except for ownership interest) | Interest |  |  | and Equipment |  |  | Depreciation |  |  | Progress |
Duke Energy Carolinas |  |  |  |  |  |  |  |
Catawba (units 1 and 2)(a) | 19.25 | % |  | $ | 989 |  |  | $ | 483 |  |  | $ | 17 |
W.S. Lee CC(b) | 86.67 | % |  | 593 |  |  | 12 |  |  | 4 |
Duke Energy Indiana |  |  |  |  |  |  |  |  |  |  |
Gibson (unit 5)(c) | 50.05 | % |  | 390 |  |  | 173 |  |  | 3 |
Vermillion(d) | 62.50 | % |  | 168 |  |  | 135 |  |  | — |
Transmission and local facilities(c) | Various |  |  | 5,037 |  |  | 1,769 |  |  | — |
(a) | Jointly owned with North Carolina Municipal Power Agency Number 1, NCEMC and PMPA.
(b) | Jointly owned with NCEMC.
(c) | Jointly owned with WVPA and Indiana Municipal Power Agency.
(d) | Jointly owned with WVPA.
Effective June 30, 2018, Duke Energy Ohio, Ohio Power Company, and The Dayton Power and Light Company, completed an asset exchange that reallocated their ownership interest in certain jointly owned transmission facilities. This transaction was approved by FERC and PUCO. The transaction eliminated the joint owner relationships for these assets. Assets were exchanged at net book value and the net increase in Duke Energy Ohio's assets are shown within Capital expenditures in Duke Energy Ohio's Consolidated Statements of Cash Flows.

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- Definition Joint Ownership Of Generating And Transmission Facilities [Abstract] + References No definition available. + Details
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- Definition The entire disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants. + References No definition available. + Details
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