Business Description and Summary of Significant Accounting Policies - Estimated useful lives of depreciable properties (Details)	9 Months Ended
	Sep. 30, 2018
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	40 years
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	5 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	20 years
Tooling | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	3 years
Tooling | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	5 years