Fair Value Measurements (Tables)

12 Months Ended

Apr. 26, 2013

Fair Value Disclosures [Abstract]

Information by Level for Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis:

	FairValue as of		FairValue Measurements Using Inputs Considered as
(in millions)	April 26, 2013		Level 1		Level 2		Level 3
Assets:
Corporate debt securities	$	4,661	$	—	$	4,651	$	10
Auction rate securities	103		—		—		103
Mortgage-backed securities	1,053		—		1,039		14
U.S. government and agency securities	3,898		1,833		2,065		—
Foreign government and agency securities	38		—		38		—
Certificates of deposit	6		—		6		—
Other asset-backed securities	541		—		541		—
Marketable equity securities	155		155		—		—
Exchange-traded funds	50		50		—		—
Derivative assets	394		213		181		—
Total assets	$	10,899	$	2,251	$	8,521	$	127
Liabilities:
Derivative liabilities	$	58	$	40	$	18	$	—
Contingent milestone payments associated with acquisitions subsequent to April 24, 2009	142		—		—		142
Total liabilities	$	200	$	40	$	18	$	142

	FairValue as of		Fair Value Measurements Using Inputs Considered as
(in millions)	April 27, 2012		Level 1		Level 2		Level 3
Assets:
Corporate debt securities	$	3,541	$	—	$	3,531	$	10
Auction rate securities	127		—		—		127
Mortgage-backed securities	839		—		810		29
U.S. government and agency securities	3,160		1,511		1,649		—
Foreign government and agency securities	67		—		67		—
Certificates of deposit	47		—		47		—
Other asset-backed securities	537		—		531		6
Marketable equity securities	253		253		—		—
Exchange-traded funds	46		46		—		—
Derivative assets	254		87		167		—
Total assets	$	8,871	$	1,897	$	6,802	$	172
Liabilities:
Derivative liabilities	$	82	$	37	$	45	$	—
Contingent milestone payments associated with acquisitions subsequent to April 24, 2009	231		—		—		231
Total liabilities	$	313	$	37	$	45	$	231

Fair Value Inputs, Assets, Quantitative Information

The following table represents the range of the unobservable inputs utilized in the fair value measurement of the auction rate securities classified as Level 3 as of April 26, 2013:

	Valuation Technique	Unobservable Input	Range (Weighted Average)
Auction rate securities	Discounted cash flow	Years to principal recovery	2 yrs. - 12 yrs. (3 yrs.)
		Illiquidity premium	6%

Reconciliation of Beginning and Ending Balances of Items Measured at Fair Value on a Recurring Basis that Used Significant Unobservable Inputs (Level 3)

The following table provides a reconciliation of the beginning and ending balances of investments measured at fair value on a recurring basis that used significant unobservable inputs (Level 3):

(in millions)	Total Level 3 Investments			Corporate debt securities		Auction rate securities			Mortgage- backed securities			Other asset- backed securities
Balance as of April 27, 2012	$	172		$	10	$	127		$	29		$	6
Total realized losses and other-than-temporary impairment losses included in earnings	—			—		—			—			—
Total unrealized gains (losses) included in other comprehensive income	11			—		11			—			—
Settlements	(56		)	—		(35		)	(15		)	(6		)
Balance as of April 26, 2013	$	127		$	10	$	103		$	14		$	—

(in millions)	Total Level 3 Investments			Corporate debt securities			Auction rate securities			Mortgage- backed securities			Other asset- backed securities
Balance as of April 29, 2011	$	191		$	17		$	133		$	35		$	6
Total realized losses and other-than-temporary impairment losses included in earnings	(3		)	(1		)	—			(1		)	(1		)
Total unrealized gains (losses) included in other comprehensive income	9			1			8			(1		)	1
Settlements	(25		)	(7		)	(14		)	(4		)	—
Balance as of April 27, 2012	$	172		$	10		$	127		$	29		$	6