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3. Fair Value Measurements Fair Value and Gross Unrealized Losses with Unrealized Losses (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fair value	$ 99.3	$ 77.8
Gross unrealized losses for investments in a loss position 12 months or more	0.1	0.4
Gross unrealized losses for investments in a loss position less than 12 months	$ 0.5	$ 0.8
Cost Method Investment, Percentage Owned	30.00%

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Cost Method Investments, Percentage Owned

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Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities.

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This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ References

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

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Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for securities categorized neither as held-to-maturity nor trading securities.

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

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-Name Accounting Standards Codification

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