Marketable Securities

6 Months Ended

Jun. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

Marketable Securities

	June 30, 2015						December 31, 2014
	Cost		Unrealized Gain (Loss)		Fair Value		Cost		Unrealized Gain (Loss)		Fair Value
U.S. government securities	$	40	$	—	$	40	$	38	$	—	$	38
Corporate securities	42				42		36				36
Certificates of deposit	22				22		23				23
Other	60		5		65		67		5		72
Total marketable securities	$	164	$	5	$	169	$	164	$	5	$	169

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 through ten years total $38, $62 and $3 at June 30, 2015.