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Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified

Jun. 28, 2014

Mar. 29, 2014

Available-for-sale securities

$ 3,499,144

$ 3,606,739

Available-for-sale Securities, Gross Unrealized Gains (Instant)

21,598

16,763

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(10,929)

(18,153)

Available-for-sale Securities, Noncurrent

1,109,645

1,190,775

^[1]

Estimated Fair Value

3,509,813

3,605,349

Money Market Funds [Member]

Available-for-sale securities

174,031

213,988

Available-for-sale Securities, Gross Unrealized Gains (Instant)

0

0

Available-for-sale Securities, Gross Unrealized Losses (Instant)

0

0

Estimated Fair Value

174,031

213,988

financial institution securities [Member]

Available-for-sale securities

254,969

366,906

Available-for-sale Securities, Gross Unrealized Gains (Instant)

0

0

Available-for-sale Securities, Gross Unrealized Losses (Instant)

0

0

Estimated Fair Value

254,969

366,906

Non-financial institution securities [Member]

Available-for-sale securities

621,880

753,888

Available-for-sale Securities, Gross Unrealized Gains (Instant)

4,470

3,428

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(344)

(1,244)

Estimated Fair Value

626,006

756,072

Auction Rate Securities [Member]

Available-for-sale securities

21,500

21,500

Available-for-sale Securities, Gross Unrealized Gains (Instant)

0

0

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(796)

(1,340)

Available-for-sale Securities, Noncurrent

20,704

20,160

Municipal Bonds [Member]

Available-for-sale securities

38,164

31,367

Available-for-sale Securities, Gross Unrealized Gains (Instant)

820

604

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(143)

(205)

Estimated Fair Value

38,841

31,766

U.S. Government and Agency Securities [Member]

Available-for-sale securities

593,637

548,568

Available-for-sale Securities, Gross Unrealized Gains (Instant)

1,145

1,135

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(80)

(184)

Estimated Fair Value

594,702

549,519

Foreign Government and Agency Securities [Member]

Available-for-sale securities

410,896

354,935

Available-for-sale Securities, Gross Unrealized Gains (Instant)

0

0

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(6)

0

Estimated Fair Value

410,890

354,935

Mortgage-Backed Securities [Member]

Available-for-sale securities

1,225,050

1,234,237

Available-for-sale Securities, Gross Unrealized Gains (Instant)

14,355

11,380

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(6,870)

(10,528)

Estimated Fair Value

1,232,535

1,235,089

Debt Mutual Fund [Member]

Available-for-sale securities

101,350

81,350

Available-for-sale Securities, Gross Unrealized Gains (Instant)

703

216

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(2,625)

(4,652)

Estimated Fair Value

99,428

76,914

Bank Loans [Member]

Available-for-sale securities

57,667

0

Available-for-sale Securities, Gross Unrealized Gains (Instant)

105

0

Available-for-sale Securities, Gross Unrealized Losses (Instant)

(65)

0

Estimated Fair Value

$ 57,707

$ 0

[1]	Derived from audited financial statements

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.

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