Balance Sheet Related Information (Details 2) (Inventory Valuation Reserve [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Inventory Valuation Reserve [Member]
Inventory valuation reserve
Balance at the beginning of the year	$ 2.1	$ 2.7	$ 2.1
Charged to costs and expenses	2.1	2.1	4.0
Disposals and currency translation adjustments	(1.6)	(2.7)	(3.4)
Balance at the end of the year	$ 2.6	$ 2.1	$ 2.7