Summary of Significant Accounting Policies - Plant and Equipment, Estimated Useful Life (Details)	12 Months Ended
	Dec. 31, 2018
Building | Minimum
Property, Plant and Equipment [Line Items]
Useful life of property, plant, and equipment	15 years
Building | Maximum
Property, Plant and Equipment [Line Items]
Useful life of property, plant, and equipment	40 years
Machinery and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life of property, plant, and equipment	3 years
Machinery and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life of property, plant, and equipment	20 years