Investments

As of August 29, 2013 and August 30, 2012, available-for-sale investments, including cash equivalents, were as follows:



As of	2013									2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	1,188	$	—	$	—		$	1,188	$	2,159	$	—	$	—	$	2,159
Corporate bonds	414		1		(1		)	414		233		1		—		234
Certificates of deposit	349		—		—			349		31		—		—		31
Government securities	168		—		—			168		144		—		—		144
Asset-backed securities	97		—		—			97		77		—		—		77
Commercial paper	61		—		—			61		39		—		—		39
Marketable equity securities	6		—		—			6		10		—		—		10
	$	2,283	$	1	$	(1	)	$	2,283	$	2,693	$	1	$	—	$	2,694

As of August 29, 2013, no available-for-sale security had been in a loss position for longer than 12 months. During 2013 and 2012, we recognized other-than-temporary impairments of our marketable equity securities of $4 million and $11 million, respectively.

The table below presents the amortized cost and fair value of available-for-sale debt securities, including cash equivalents, as of August 29, 2013 by contractual maturity:



	Amortized Cost		Fair Value
Money market funds not due at a single maturity date	$	1,188	$	1,188
Due in 1 year or less	596		596
Due in 1 - 2 years	224		224
Due in 2 - 4 years	253		253
Due after 4 years	16		16
	$	2,277	$	2,277

Net unrealized holding gains reclassified out of accumulated other comprehensive income from sales of available-for-sale securities were $31 million for 2012 and were not significant for any other period presented. Proceeds from the sales of available-for-sale securities for 2013, 2012 and 2011 were $526 million, $149 million and $1 million, respectively. Gross realized gains from sales of available-for-sale securities were $34 million for 2012 and gross realized gains and losses for all other periods presented were not significant.