Joint Ownership of Generating and Transmission Facilities (Tables)

12 Months Ended

Dec. 31, 2017

Jointly Owned Utility Plant Interests [Line Items]

Schedule Joint Ownership of Generating and Transmission Facilities

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, 2017
							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	%	$	927	$	651	$	19
Lee Combined Combustion Station(b)	86.67	%	—		—		552
Duke Energy Ohio
Transmission facilities(c)	Various		89		63		1
Duke Energy Indiana
Gibson Station (unit 5)(d)	50.05	%	348		162		9
Vermillion Generating Station(e)	62.5	%	155		120		—
Transmission and local facilities(d)	Various		4,672		1,739		—

(a) Jointly owned with North Carolina Municipal Power Agency Number 1, NCEMC and Piedmont Municipal Power Agency.

(b) Jointly owned with NCEMC.

(c) Jointly owned with America Electric Power Generation Resources and The Dayton Power and Light Company.

(d) Jointly owned with Wabash Valley Power Association, Inc. (WVPA) and Indiana Municipal Power Agency.

(e) Jointly owned with WVPA.