XML 60 R47.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Significant Accounting Policies - Long-Lived Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment      
Impairment loss of property, plant and equipment $ 4.2 $ 16.0 $ 17.7
Buildings | Minimum      
Property, Plant and Equipment      
Useful lives 5 years    
Buildings | Maximum      
Property, Plant and Equipment      
Useful lives 50 years    
Machinery and equipment | Minimum      
Property, Plant and Equipment      
Useful lives 3 years    
Machinery and equipment | Maximum      
Property, Plant and Equipment      
Useful lives 20 years