Summary of Significant Accounting Policies - Property, Plant and Equipment (Details 4)	12 Months Ended
	Dec. 31, 2017
Building and Building Improvements | Minimum
Property, Plant and Equipment
Property, Plant and Equipment, useful lives	10 years
Building and Building Improvements | Maximum
Property, Plant and Equipment
Property, Plant and Equipment, useful lives	45 years
Machinery and Equipment | Minimum
Property, Plant and Equipment
Property, Plant and Equipment, useful lives	3 years
Machinery and Equipment | Maximum
Property, Plant and Equipment
Property, Plant and Equipment, useful lives	15 years