Financial Instruments (Details Textual 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Business Acquisition
Number of strategic investments sold		4	1
Selling price of strategic investments		$ 40.6	$ 1.8
Gain (loss) from sale of strategic equity investments		13.5
Strategic investment portfolio	64.2	62.8
Venture capital investments	29.3	23.6
Stromedix, Inc.
Business Acquisition
Recognized gain	9.0
Strategic Investments
Business Acquisition
Cost basis of equity securities of certain privately-owned companies and venture capital funds	34.9	39.2
Net gains realized	$ 6.5	$ 7.3	$ 20.1

This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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+ Details