Inventories (Tables)
 3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
Major classes of inventories
Major classes of inventories are summarized as follows:
 
 
March 31, 2015
 
December 31, 2014
Finished goods
 
$
196.8

 
$
197.4

Service parts
 
135.2

 
125.6

Raw materials and work in process
 
90.5

 
82.2

Total inventories
 
$
422.5

 
$
405.2