Income Taxes - Income Tax Examinations (Details)	12 Months Ended
	Dec. 31, 2014
U.S. Federal
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2010 and prior
China
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2008 and prior
France
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2008 and prior
Germany
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2007 and prior
Hungary
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2008 and prior
Japan
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2011 and prior
South Korea
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2008 and prior
Sweden
Major tax payer in tax Jurisdiction
Years no longer subject to examination	2008 and prior