Exit Activities and Reductions in Force Textuals (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Korea Subsidiaries [Member] employees	Mar. 31, 2013 Korea Subsidiaries [Member] Cost of sales [Member]	Mar. 31, 2013 Korea Subsidiaries [Member] Selling, General and Administrative Expenses [Member]	Mar. 31, 2013 Korea Subsidiaries [Member] Research and Development [Member]	Mar. 31, 2012 Japan Subsidiaries [Member] employees	Mar. 31, 2012 Japan Subsidiaries [Member] Cost of sales [Member]	Mar. 31, 2012 Japan Subsidiaries [Member] Selling, General and Administrative Expenses [Member]	Mar. 31, 2012 Japan Subsidiaries [Member] Research and Development [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	$ 4.0	$ 3.5	$ 0.2	$ 0.3	$ 7.2	$ 5.5	$ 1.6	$ 0.1
Restructuring and Related Cost, Number of Positions Eliminated (employees)	50				120
Curtailment and settlement charges					$ 1.0