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Product Warranties (Summary of Activity for the Accrual of Product Warranties) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Product Warranties Disclosures [Abstract]    
Balance at beginning of period $ 0.4 $ 0.2
Current year warranty accruals 8.6 2.0
Reductions for payments (8.4) (1.8)
Balance at end of period $ 0.6 $ 0.4