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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Goodwill consists of the following (in millions):
 
Software Solutions
 
Data and Analytics
 
Corporate and Other
 
Total
Balance, December 31, 2016
$
2,131.7

 
$
172.1

 
$
—

 
$
2,303.8

Activity
3.0

 
—

 
—

 
3.0

Balance, December 31, 2017
2,134.7

 
172.1

 
—

 
2,306.8

HeavyWater and Ernst acquisitions (Note 3)
22.9

 
—

 
—

 
22.9

Balance, December 31, 2018
$
2,157.6

 
$
172.1

 
$
—

 
$
2,329.7