Quarterly report pursuant to Section 13 or 15(d)

Investments In Available-For-Sale Securities And Other Cost Investments (Unrealized Holding Gains And Losses) (Details)

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Investments In Available-For-Sale Securities And Other Cost Investments (Unrealized Holding Gains And Losses) (Details) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Equity Securities [Member]
   
Gross unrealized holding gains $ 0 $ 32
Gross unrealized holding losses 0 0
Debt Securities [Member]
   
Gross unrealized holding gains 0 66
Gross unrealized holding losses $ 0 $ 0