Marketable Securities

3 Months Ended

Mar. 31, 2013

Investments, Debt and Equity Securities [Abstract]



	March 31, 2013						December 31, 2012
	Cost		Unrealized Gains		Fair Value		Cost		Unrealized Gains		Fair Value
U.S. government securities	$	7	$	—	$	7	$	7	$	—	$	7
Corporate securities	11				11		11				11
Certificates of deposit	18				18		16				16
Other	25		2		27		25		1		26
Total marketable securities	$	61	$	2	$	63	$	59	$	1	$	60

U.S. government securities include bonds issued by government-sponsored agencies and Treasury notes. Corporate securities include both debt and equity 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 $20, $13 and $3 at March 31, 2013.

We received proceeds of $1 from liquidating available-for-sale marketable securities prior to their scheduled maturities in the first quarter 2012. The related loss realized on this activity was not significant.