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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Major classes of inventories
The following table summarizes the major classes of inventories as of December 31:
20202019
Finished goods$204.7 $166.6 
Service parts169.0 175.4 
Raw materials and work in process124.5 124.5 
Total inventories$498.2 $466.5