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Investments (Summary of Short-term Investments by Type) (Details) - USD ($) $ in Thousands | Mar. 27, 2016 | Jun. 28, 2015
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 500,710 | $ 572,160
Gross Unrealized Gains | 4,539 | 1,820
Gross Unrealized Losses | (361) | (499)
Estimated Fair Value | 504,888 | 573,481
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 188,312 | 194,123
Gross Unrealized Gains | 2,563 | 988
Gross Unrealized Losses | (50) | (341)
Estimated Fair Value | 190,825 | 194,770
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 163,898 | 152,831
Gross Unrealized Gains | 1,976 | 832
Gross Unrealized Losses | (311) | (158)
Estimated Fair Value | 165,563 | 153,505
U.S. | Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 3,500 | 0
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | 3,500 | 0
Non-US [Member] | Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 145,000 | 225,206
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Estimated Fair Value | $ 145,000 | $ 225,206

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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