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Product Warranty (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Beginning Balance $ 8.0 $ 8.0
Accrued to expense 0.0 1.0
Payments made 0.0 (1.0)
Total warranty reserves 8.0 8.0
Current portion of warranty reserves (2.0) (2.0)
Long-term portion of warranty reserves $ 6.0 $ 6.0