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Goodwill
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL GOODWILL

Goodwill represents the excess of the cost of an acquisition over the fair value of the identifiable net assets acquired. 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.

As of July 1, 2019, annual impairment tests were completed at all of our reporting units that carried a goodwill balance. No impairments resulted from these tests.