Marketable Securities

3 Months Ended

Mar. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Marketable Securities [Text Block]

Marketable Securities

	March 31, 2017						December 31, 2016
	Cost		Unrealized Gain (Loss)		Fair Value		Cost		Unrealized Gain (Loss)		Fair Value
U.S. government securities	$	2	$	—	$	2	$	2	$	—	$	2
Corporate securities	3				3		2				2
Certificates of deposit	22				22		22				22
Other	4				4		4				4
Total marketable securities	$	31	$	—	$	31	$	30	$	—	$	30

U.S. government securities include bonds issued by government-sponsored agencies and Treasury notes. Corporate securities are 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 and after one year through five years totals $22 and $5 at March 31, 2017.