XML 55 R44.htm IDEA: XBRL DOCUMENT v3.8.0.1
Property, Plant and Equipment - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 21.3 $ 18.9 $ 58.4 $ 55.8