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Product Warranties (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Movement in Standard Product Warranty Accrual      
Beginning balance $ 8.9 $ 11.6 $ 11.6
Issued - warranty expense 7.8 5.1 3.1
Acquired - warranty reserve 0.0 0.0 0.9
Change in estimate - warranty expense 0.0 (1.6) 1.5
Warranty usage (5.0) (6.2) (5.5)
Ending balance $ 11.7 $ 8.9 $ 11.6