XML 48 R32.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies - Warranty activity (Details) - Warranty Reserves
$ in Millions
9 Months Ended
Sep. 30, 2017
USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]  
Beginning balance $ 29.9
Amounts accrued 29.0
Warranties charged to accrual (20.0)
Ending balance $ 38.9