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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill by Segment
Changes in the carrying amount of goodwill by segment for the years ended December 31, 2018 and 2017 were as follows:
 
 
Total

 
Services

 
Technology

Balance at December 31, 2016
 
$
178.6

 
$
69.9

 
$
108.7

Translation adjustments
 
2.2

 
2.2

 
—

Balance at December 31, 2017
 
180.8

 
72.1

 
108.7

Translation adjustments
 
(3.0
)
 
(3.0
)
 
—

Balance at December 31, 2018
 
$
177.8

 
$
69.1

 
$
108.7