Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013
Available-for-sale securities
Amortized Cost	$ 3,606,739	$ 3,272,432
Available-for-sale Securities, Gross Unrealized Gains (Instant)	16,763	25,316
Available-for-sale Securities, Gross Unrealized Losses (Instant)	(18,153)	(8,527)
Available-for-sale Securities, Noncurrent	1,190,775	1,651,033
Estimated Fair Value	3,605,349	3,289,221
Money Market Funds [Member]
Available-for-sale securities
Amortized Cost	213,988	108,311
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	0	0
Estimated Fair Value	213,988	108,311
financial institution securities [Member]
Available-for-sale securities
Amortized Cost	366,906	304,921
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	0	0
Estimated Fair Value	366,906	304,921
Non-financial institution securities [Member]
Available-for-sale securities
Amortized Cost	753,888	594,561
Available-for-sale Securities, Gross Unrealized Gains (Instant)	3,428	5,193
Available-for-sale Securities, Gross Unrealized Losses (Instant)	(1,244)	(135)
Estimated Fair Value	756,072	599,619
Auction Rate Securities [Member]
Available-for-sale securities
Amortized Cost	21,500	31,900
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	(1,340)	(3,200)
Available-for-sale Securities, Noncurrent	20,160	28,700
Municipal Bonds [Member]
Available-for-sale securities
Amortized Cost	31,367	24,496
Available-for-sale Securities, Gross Unrealized Gains (Instant)	604	514
Available-for-sale Securities, Gross Unrealized Losses (Instant)	(205)	(70)
Estimated Fair Value	31,766	24,940
U.S. Government and Agency Securities [Member]
Available-for-sale securities
Amortized Cost	548,568	696,836
Available-for-sale Securities, Gross Unrealized Gains (Instant)	1,135	431
Available-for-sale Securities, Gross Unrealized Losses (Instant)	(184)	(45)
Estimated Fair Value	549,519	697,222
Foreign Government and Agency Securities [Member]
Available-for-sale securities
Amortized Cost	354,935	269,901
Available-for-sale Securities, Gross Unrealized Gains (Instant)	0	0
Available-for-sale Securities, Gross Unrealized Losses (Instant)	0	0
Estimated Fair Value	354,935	269,901
Mortgage-Backed Securities [Member]
Available-for-sale securities
Amortized Cost	1,234,237	1,180,156
Available-for-sale Securities, Gross Unrealized Gains (Instant)	11,380	17,601
Available-for-sale Securities, Gross Unrealized Losses (Instant)	(10,528)	(5,077)
Estimated Fair Value	1,235,089	1,192,680
Debt Mutual Fund [Member]
Available-for-sale securities
Amortized Cost	81,350	61,350
Available-for-sale Securities, Gross Unrealized Gains (Instant)	216	1,577
Available-for-sale Securities, Gross Unrealized Losses (Instant)	(4,652)	0
Estimated Fair Value	$ 76,914	$ 62,927

- Definition

Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

+ References+ Details