Reporting Segments and Related Information - Major Customers & Products (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue from External Customer [Line Items]
Percentage of net sales	10.00%
Sales Revenue, Goods, Net [Member] | Turbochargers [Member]
Revenue from External Customer [Line Items]
Concentration Risk, Percentage	26.00%	26.00%	26.00%
Sales Revenue, Goods, Net [Member] | Volkswagen [Member]
Revenue from External Customer [Line Items]
Concentration Risk, Percentage	17.00%	0.00%	19.00%
Sales Revenue, Goods, Net [Member] | Ford [Member]
Revenue from External Customer [Line Items]
Concentration Risk, Percentage	13.00%	12.00%	11.00%
Accounts Receivable [Member] | Volkswagen and Ford [Member]
Revenue from External Customer [Line Items]
Concentration Risk, Percentage	18.00%
Accounts Receivable, Net	218.8