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Goodwill
3 Months Ended
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
Goodwill
 The following presents NiSource’s goodwill balance allocated by segment as of March 31, 2017:
(in millions)
 
Gas Distribution Operations
 
Electric Operations
 
Corporate and Other
 
Total
Goodwill
 
$
1,690.7

 
$

 
$

 
$
1,690.7



NiSource completed a quantitative ("step 1") fair value measurement of its reporting units during the May 1, 2016 goodwill test. The test indicated that the fair value of each of the reporting units that are allocated goodwill exceeded their carrying values, indicating that no impairment was necessary.