Marketable Securities

3 Months Ended

Mar. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

Marketable Securities

	March 31, 2014						December 31, 2013
	Cost		Unrealized Gain (Loss)		Fair Value		Cost		Unrealized Gain (Loss)			Fair Value
U.S. government securities	$	38	$	—	$	38	$	27	$	—		$	27
Corporate securities	33				33		30		(1		)	29
Certificates of deposit	22				22		21					21
Other	48		3		51		31		2			33
Total marketable securities	$	141	$	3	$	144	$	109	$	1		$	110

U.S. government securities include bonds issued by government-sponsored agencies and Treasury notes. Corporate securities include primarily debt securities. Other consists of investments in mutual and index funds. U.S. government securities, corporate debt and certificates of deposit maturing in one year or less, after one year through five years and after five years total $23, $67 and $2 at March 31, 2014.