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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of changes to goodwill balances by segment The table below shows changes to our goodwill balances by segment during the years ended December 31, 2019 and 2018:
 
 
Wisconsin
 
Illinois
 
Other States
 
Non-Utility Energy Infrastructure
 
Total
(in millions)
 
2019
 
2018
 
2019
 
2018
 
2019
 
2018
 
2019
 
2018
 
2019
 
2018
Goodwill balance as of January 1
 
$
2,104.3

 
$
2,104.3

 
$
758.7

 
$
758.7

 
$
183.2

 
$
183.2

 
$
6.6

 
$
7.3

 
$
3,052.8

 
$
3,053.5

Adjustment to Bluewater purchase price allocation (1)
 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
(0.7
)
 
—

 
(0.7
)
Goodwill balance as of December 31 (2)
 
$
2,104.3

 
$
2,104.3

 
$
758.7

 
$
758.7

 
$
183.2

 
$
183.2

 
$
6.6

 
$
6.6

 
$
3,052.8

 
$
3,052.8



(1) 
See Note 2, Acquisitions, for more information on the acquisition of Bluewater.

(2) 
We had no accumulated impairment losses related to our goodwill as of December 31, 2019.