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Joint Ownership of Generating and Transmission Facilities
 12 Months Ended
Dec. 31, 2016
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, 2016
 
 
 
 
 
 
 
Construction

 
Ownership

 
Property, Plant

 
Accumulated

 
Work in

(in millions except for ownership interest)
Interest

 
and Equipment

 
Depreciation

 
Progress

Duke Energy Carolinas
 

 
 
 
 
 
 
Catawba Nuclear Station (units 1 and 2)(a)
19.25
%
 
$
954

 
$
612

 
$
12

Duke Energy Ohio
 
 
 

 
 

 
 

Transmission facilities(b)
Various

 
90

 
60

 
1

Duke Energy Indiana
 

 
 

 
 

 
 

Gibson Station (unit 5)(c)
50.05
%
 
333

 
157

 
11

Vermillion Generating Station(d)
62.5
%
 
154

 
111

 
—

Transmission and local facilities(c)
Various

 
4,315

 
1,715

 
—


(a)
Jointly owned with North Carolina Municipal Power Agency Number 1, NCEMC and Piedmont Municipal Power Agency.
(b)
Jointly owned with America Electric Power Generation Resources and The Dayton Power and Light Company.
(c)
Jointly owned with Wabash Valley Power Association, Inc. (WVPA) and Indiana Municipal Power Agency.
(d)
Jointly owned with WVPA.
On August 31, 2016, Duke Energy Florida completed the purchase of Georgia Power Company's (GPC) ownership interest in Intercession City Station Unit 11 for an amount equal to GPC's net book value of the facility as of the transaction close date. Following the purchase, Duke Energy Florida controls the entire output of the facility.
At December 31, 2016, Duke Energy Florida owns 100 percent of the retired Crystal River Unit 3. Duke Energy Florida completed the purchase of 1.7 percent ownership interest from Seminole Electric Cooperative, Inc. on November 30, 2016. On October 30, 2015, Duke Energy Florida completed the purchase of 6.52 percent ownership interest from the Florida Municipal Joint Owners and settled other disputes for $55 million. All costs associated with Crystal River Unit 3 are included within Regulatory assets on the Consolidated Balance Sheets of Duke Energy, Progress Energy and Duke Energy Florida. See Note 4 for additional information.