Marketable Securities

12 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

Marketable Securities

	2014						2013
	Cost		Unrealized Gains (Losses)		Fair Value		Cost		Unrealized Gains (Losses)			Fair Value
U.S. government securities	$	38	$	—	$	38	$	27	$	—		$	27
Corporate securities	36				36		30		(1		)	29
Certificates of deposit	23				23		21					21
Other	67		5		72		31		2			33
Total marketable securities	$	164	$	5	$	169	$	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 through ten years total $32, $64 and $1 at December 31, 2014.