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3. Fair Value and Gross Unrealized Losses with Unrealized Losses (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value of Investments with Gross Unrealized Losses	$ 97.5	$ 99.3
Fair Value of Investments with Gross Unrealized Losses in loss position 12 months or more		0.3
Gross unrealized losses for investments in a loss position 12 months or more	0	0.1
Gross unrealized losses for investments in a loss position less than 12 months	0.3	0.5
Cost Method Investment, Percentage Owned	30.00%
Fair Value of Investments with Gross Unrealized Losses in loss position less than 12 months		$ 99.0

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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.

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