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Investments In Marketable Securities
 3 Months Ended
Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]  
INVESTMENTS IN MARKETABLE SECURITIES
INVESTMENTS IN MARKETABLE SECURITIES
The Company’s investments in marketable debt and equity securities as of March 31, 2015 and December 31, 2014 by security class and by level within the fair value hierarchy have been disclosed in Note 3—Fair Value. The security classes are determined based on the nature and risk of a security and are consistent with how the Company manages, monitors and measures its marketable securities. As of March 31, 2015, $549 million of available-for-sale debt securities had stated maturities within one year and $35 million had stated maturities between one and two years. Gains and losses on the sale of investments are determined using the specific-identification method. For the three months ended March 31, 2015 and 2014, pretax gains and losses related to available-for-sale and trading securities were less than $1 million, there were no realized losses on the sale of available-for-sale securities, and no other-than-temporary impairments of marketable securities were recognized in earnings or other comprehensive income. The following table summarizes the gross proceeds from sale of available-for-sale securities for the periods indicated:
 
Three Months Ended March 31,
 
2015
 
2014
 
(in millions)
Gross proceeds from sales of available-for-sale securities
$
1,086

 
$
1,060