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Investments In Marketable Securities (Tables)
9 Months Ended
Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]  
Pre-Tax Gains And Losses On Available For Sale Securities
The following table summarizes the gross proceeds from sale of available-for-sale securities for the periods indicated:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2014
 
2013
 
2014
 
2013
 
 
(in millions)
Gross proceeds from sales of available-for-sale securities
 
$
1,144

 
$
1,071

 
$
3,362

 
$
3,394