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Joint Ownership of Generating and Transmission Facilities
12 Months Ended
Dec. 31, 2021
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, 2021
Construction
OwnershipProperty, PlantAccumulatedWork in
(in millions except for ownership interest)Interestand EquipmentDepreciationProgress
Duke Energy Carolinas     
Catawba (units 1 and 2)(a)
19.25 %$1,044 $525 $20 
W.S. Lee CC(b)
87.27 %632 67 3 
Duke Energy Indiana     
Gibson (unit 5)(c)
50.05 %440 221 3 
Vermillion(d)
62.50 %175 108 5 
Transmission and local facilities(c)
Various6,164 1,477 190 
(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 IMPA.
(d)    Jointly owned with WVPA.