Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Marketable Securities

	2012						2011
			Unrealized		Fair				Fair
	Cost		Gains		Value		Cost		Value
U.S. government securities	$	7	$	-	$	7	$	10	$	10
Corporate securities		11				11		8		8
Certificates of deposit		16				16		13		13
Other		25		1		26		25		25
Total marketable securities	$	59	$	1	$	60	$	56	$	56