Financial Instruments (Details Textual 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011 Investment
Stromedix, Inc.
Business Acquisition
Recognized gain		$ 9.0
Strategic Investments
Business Acquisition
Strategic investment portfolio	56.9	64.2
Venture capital investments	33.1	29.3
Cost basis of equity securities of certain privately-held companies and venture capital funds	23.8	34.9
Net gains (losses) realized	14.4	6.5	7.3
Number of strategic investments sold			4
Selling price of strategic investments			40.6
Gain (loss) from sale of strategic equity investments			13.5
Portola Pharmaceuticals Member | Strategic Investments
Business Acquisition
Gain (loss) from sale of strategic equity investments	$ 7.1