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Marketable Securities (Schedule of Available-for-sale Securities) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 29, 2014 | Mar. 30, 2013
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Schedule of Available-for-sale Securities [Line Items] |  |
Estimated Fair Value (Net Carrying Amount) | $ 352,660 | $ 170,145
Gross Unrealized Losses | (253) | (164)
Gross Unrealized Gains | 73 | 15
Amortized Cost | 352,840 | 170,294
Corporate Debt Securities - U.S. [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Estimated Fair Value (Net Carrying Amount) | 246,685 | 94,667
Gross Unrealized Losses | (245) | (133)
Gross Unrealized Gains | 52 | 2
Amortized Cost | 246,878 | 94,798
U.S. Treasury Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Estimated Fair Value (Net Carrying Amount) | 56,994 | 34,381
Gross Unrealized Losses | (2) | (3)
Gross Unrealized Gains | 10 | 4
Amortized Cost | 56,986 | 34,380
Agency Discount Notes [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Estimated Fair Value (Net Carrying Amount) | 2,009 | 1,027
Gross Unrealized Gains | 1 |
Amortized Cost | 2,008 | 1,027
Commercial Paper [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Estimated Fair Value (Net Carrying Amount) | 41,970 | 40,070
Gross Unrealized Losses | (2) | (28)
Gross Unrealized Gains | 10 | 9
Amortized Cost | 41,962 | 40,089
Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Estimated Fair Value (Net Carrying Amount) | 5,002 |
Gross Unrealized Losses | (4) |
Amortized Cost | $ 5,006 |

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References No definition available. + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References No definition available. + Details
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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (b)-(g) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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