Annual report pursuant to Section 13 and 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, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Equity Securities [Member]
   
Gross unrealized holding gains $ 6 $ 2
Gross unrealized holding losses 0 0
Debt Securities [Member]
   
Gross unrealized holding gains 1 37
Gross unrealized holding losses $ 0 $ 0