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Securities
6 Months Ended
Jun. 30, 2013
Investments, Debt and Equity Securities [Abstract]  
Securities
Securities
 
Securities Available-for-Sale During the first quarter of 2013, we liquidated our remaining securities available-for-sale portfolio and, as a result, do not have any available-for-sale securities at June 30, 2013. Securities consisted of the following available-for-sale investments for continuing operations at December 31, 2012:
 
December 31, 2012
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
 
(in millions)
Money market funds
$
80

 
$

 
$

 
$
80

Securities available-for-sale
$
80

 
$

 
$

 
$
80


Securities Purchased Under Agreements to Resell Securities purchased under agreements to resell ("Resale Agreements") are treated as collateralized financing transactions and are carried on our balance sheet at the amount advanced plus accrued interest with a balance of $5.3 billion and $2.2 billion at June 30, 2013 and December 31, 2012, respectively. Resale Agreements are collateralized by securities, and the market value of the securities is regularly monitored, with additional collateral obtained when appropriate. At June 30, 2013 and December 31, 2012, the market value of the securities obtained as collateral exceeded the carrying value of the Resale Agreements.