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Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Components of inventories    
Finished goods $ 350.7 $ 402.9
Work in process 5.8 6.0
Raw materials and parts 206.7 198.8
Subtotal 563.2 607.7
Excess of current cost over last-in, first-out cost (63.5) (63.6)
Total inventories, net $ 499.7 $ 544.1