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2. Fair Value and Gross Unrealized Losses with Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2011
Dec. 31, 2010
Fair value $ 76.1 $ 4.5
Gross unrealized losses for investments in a loss position 12 months or more 0.4 0.6
Gross unrealized losses for investments in a loss position less than 12 months $ 0.4 $ 0.5
Outstanding voting stock owned 30.00%