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Inventories (Tables)
6 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Major classes of inventories
Major classes of inventories are summarized as follows:
June 30, 2021December 31, 2020
Finished goods$239.8 $204.7 
Service parts176.2 169.0 
Raw materials and work in process171.5 124.5 
Total inventories$587.5 $498.2