Cash and Cash Equivalents, and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2012

Cash and Cash Equivalents, and Marketable Securities [Abstract]

Cash, 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

Marketable Securities by Contractual Maturities

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