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Product Warranty (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]        
Beginning Balance $ 8.0 $ 9.0 $ 8.0 $ 14.0
Accrued to expense 0.0 0.0 1.0 1.0
Standard Product Warranty Accrual, Other Operating Charges and Credits 0.0 0.0 0.0 (4.0)
Payments made 0.0 (1.0) (1.0) (2.0)
Total warranty reserves 8.0 9.0 8.0 9.0
Current portion of warranty reserves (2.0) (2.0) (2.0) (2.0)
Long-term portion of warranty reserves $ 6.0 $ 7.0 $ 6.0 $ 7.0