Business Description and Summary of Significant Accounting Policies - Estimated useful lives of depreciable properties (Details)	12 Months Ended
	Dec. 31, 2012
Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	5-39 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	5-20 years
Tooling
Property, Plant and Equipment [Line Items]
Estimated useful lives of depreciable properties	3-5 years