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3. Fair Value Measurements Foreign Exchange Forward Contracts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Contracts maturing in January through March 2013 to sell foreign currency
Notional value	$ 67.2
Unrealized loss	(0.2)
Contracts maturing in January through March 2013 to purchase foreign currency
Notional value	389.1
Unrealized gain	$ 0.4

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Unrealized Loss (Gain) on Foreign Currency Derivative Purchase Contracts

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Aggregate notional amount of foreign currency derivatives to purchase a foreign currency. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

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