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Goodwill and Intangible Assets (Tables)
 6 Months Ended
Jun. 30, 2015
Goodwill [Line Items]  
Goodwill By Reportable Operating Segment
The following table presents goodwill by reportable operating segment for Duke Energy.
Duke Energy
(in millions)
Regulated Utilities

 
International Energy

 
Commercial Portfolio

 
Total

Goodwill at December 31, 2014 (a)
15,950

 
307

 
64

 
16,321

Foreign exchange and other changes
—

 
(17
)
 
—

 
(17
)
Acquisitions
—

 
—

 
24

 
24

Goodwill at June 30, 2015
$
15,950

 
$
290

 
$
88

 
$
16,328


(a)
Excludes fully impaired Goodwill of $871 million related to the Disposal Group which was sold in the second quarter of 2015. See Note 2 for further information related to the sale of the Disposal Group. There are no other accumulated impairment charges during the periods presented.