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Investments In Marketable Securities
 12 Months Ended
Dec. 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 December 31, 2015 and 2014 by security class and by level within the fair value hierarchy have been disclosed in Note 4—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 December 31, 2015, $462 million of available-for-sale ("AFS") debt securities had stated maturities within one year and $28 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 years ended December 31, 2015, 2014, and 2013, pretax realized gains and losses related to AFS and trading securities were $1 million or less, unrealized gains and losses on AFS securities were less than $1 million, and there were no other-than-temporary impairment of marketable securities recognized in earnings or OCI. The following table summarizes the gross proceeds from sale of AFS securities in millions for the years ended December 31, 2015, 2014, and 2013:
 
 
2015
 
2014
 
2013
Gross proceeds from sales of AFS securities
 
$
4,902

 
$
4,569

 
$
4,406