Summary of Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2018
Buildings | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Machinery | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	8 years
Machinery | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years
Other equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Other equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years