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Investments In Marketable Securities (Tables)
12 Months Ended
Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]  
Pre-Tax Gains And Losses On Available For Sale And Trading Securities
The following table summarizes the gross proceeds from sale of AFS securities for the years ended December 31, 2014, 2013, and 2012:
 
 
2014
 
2013
 
2012
 
 
(in millions)
Gross proceeds from sales of AFS securities
 
$
4,569

 
$
4,406

 
$
6,489