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2. Fair Value and Gross Unrealized Losses with Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2011
Dec. 31, 2010
Fair value$ 79.9$ 4.5
Gross unrealized losses for investments in a loss position 12 months or more0.40.6
Gross unrealized losses for investments in a loss position less than 12 months$ 2.2$ 0.5
Cost Method Investment, Percentage Owned30.00%