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Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Tax effect on benefit obligation $ 1,000,000 $ 0 $ 3,000,000 $ 1,000,000
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax 0 0 0 0
Tax effect on foreign currency translation $ 0 $ 0 $ 0 $ 0