Available-for-sale investments as of March 31, 2012 and December 31, 2011 were as follows:

	March 31, 2012								December 31, 2011
			Gross		Gross						Gross		Gross
	Adjusted		Unrealized		Unrealized		Fair		Adjusted		Unrealized		Unrealized		Fair
(In Millions)	Cost		Gains		Losses		Value		Cost		Gains		Losses		Value
Government bonds	$	3,510	$	1	$	(2)	$	3,509	$	4,131	$	—	$	(4)	$	4,127
Commercial paper		3,162		—		(1)		3,161		3,820		—		(3)		3,817
Bank deposits		1,252		1		—		1,253		1,046		1		(1)		1,046
Marketable equity securities		208		613		(2)		819		189		385		(12)		562
Corporate bonds		746		13		(4)		755		892		14		(9)		897
Money market fund deposits		471		—		—		471		546		—		—		546
Asset-backed securities		18		—		(3)		15		48		—		(12)		36
Total available-for-sale
investments	$	9,367	$	628	$	(12)	$	9,983	$	10,672	$	400	$	(41)	$	11,031

In the preceding table, government bonds include bonds issued or deemed to be guaranteed by government entities. Government bonds include instruments such as U.S. Treasury securities, non-U.S. government bonds, and U.S. agency securities as of March 31, 2012 and December 31, 2011.

The amortized cost and fair value of available-for-sale debt investments as of March 31, 2012, by contractual maturity, were as follows:

(In Millions)	Cost		Fair Value
Due in 1 year or less	$	8,187	$	8,194
Due in 1–2 years		218		223
Due in 2–5 years		262		259
Due after 5 years		3		2
Instruments not due at a single maturity date		489		486
Total	$	9,159	$	9,164

Instruments not due at a single maturity date in the preceding table include asset-backed securities and money market fund deposits.

In the first quarter of 2012, we sold available-for-sale investments for proceeds of $333 million ($7.6 billion in the first quarter of 2011). The gross realized gains on sales of available-for-sale investments were insignificant in the first quarter of 2012 ($28 million in the first quarter of 2011) and were primarily related to our sales of marketable equity securities. We determine the cost of an investment sold on an average cost basis at the individual security level.

The before-tax net unrealized holding gains (losses) on available-for-sale investments that have been included in other comprehensive income (loss) and the before-tax net gains (losses) reclassified from accumulated other comprehensive income (loss) into earnings were as follows:

	Three Months Ended
	March 31,		April 2,
(In Millions)	2012		2011
Net unrealized holding gains (losses) included in other comprehensive income (loss)	$	252	$	36
Net gains (losses) reclassified from accumulated other comprehensive income (loss) into earnings	$	(5)	$	44