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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill By Reportable Operating Segment
Duke Energy
The following table presents the goodwill by reportable operating segment on Duke Energy's Condensed Consolidated Balance Sheets at June 30, 2017 and December 31, 2016.
 
Electric Utilities

 
Gas Utilities

 
Commercial

 
 
(in millions)
and Infrastructure

 
and Infrastructure

 
Renewables

 
Total

Goodwill
$
17,379

 
$
1,924

 
$
122

 
$
19,425