Business Description and Summary of Significant Accounting Policies - Estimated useful lives of depreciable properties (Details)	6 Months Ended
	Jun. 30, 2012
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	39 years
Buildings and improvements | 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	15 years
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	5 years
Tooling | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	5 years
Tooling | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	3 years