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Goodwill
3 Months Ended
Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill

Goodwill by reportable business segment as of both March 31, 2016 and December 31, 2015 is as follows:
 
 
(in millions)
Natural Gas Distribution
 
$
746

Energy Services (1)
 
83

Other Operations
 
11

Total
 
$
840


(1)
Amounts presented are net of accumulated goodwill impairment charge of $252 million.