Inventory (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Inventory Disclosure [Abstract]
Inventory write-downs and reserves	$ 0.8	$ 1.7	$ 1.9	$ 4.9