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Balance Sheet Information (Warranty Reserves) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Warranty Reserves [Roll Forward]      
Beginning Balance $ 5.3 $ 5.5 $ 6.0
Provision 6.3 2.7 2.7
Usage (10.8) (2.9) (3.2)
Warranty reserves from acquired businesses   8.0  
Ending Balance $ 8.8 $ 5.3 $ 5.5