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Goodwill (Tables)
 6 Months Ended
Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill by business segment
The following summarizes changes to the Company’s goodwill, by segment:
(in millions) 
North America
 
International
 
Consolidated
Balance as of December 31, 2017
$
576.6

 
$
156.5

 
$
733.1

Foreign currency translation and other
(3.2
)
 
(2.8
)
 
(6.0
)
Balance as of June 30, 2018
$
573.4

 
$
153.7

 
$
727.1