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Goodwill and Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 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 March 31, 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