Cash and Cash Equivalents, and Marketable Securities

12 Months Ended

Dec. 31, 2012

Cash and Cash Equivalents, and Marketable Securities [Abstract]

Cash and Cash Equivalents, and Marketable Securities

Cash and Cash Equivalents, and Marketable Securities

The following table sets forth the cash, cash equivalents and marketable securities for the periods presented (in millions):

	December 31,
	2012		2011
Cash and cash equivalents:
Cash	$	1,513	$	510
Cash equivalents:
Money market funds	871		892
U.S. government securities	—		60
U.S. government agency securities	—		50
Total cash and cash equivalents	2,384		1,512
Marketable securities:
U.S. government securities	5,165		1,415
U.S. government agency securities	2,077		981
Total marketable securities	7,242		2,396
Total cash, cash equivalents and marketable securities	$	9,626	$	3,908

The gross unrealized gains or losses on our marketable securities as of December 31, 2012 and 2011 were not significant. In addition, there were no securities in a continuous loss position for 12 months or longer as of December 31, 2012 and 2011.

The following table classifies our marketable securities by contractual maturities: (in millions):

	December 31,
	2012		2011
Due in one year	$	4,815	$	1,964
Due in one to two years	2,427		432
Total	$	7,242	$	2,396