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Investments (Contractual Maturities of Short-term Investments by Type) (Details) - USD ($) $ in Thousands | Sep. 24, 2017 | Jun. 25, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | $ 188,617 |
After One, Within Five Years | 228,529 |
After Five, Within Ten Years | 55,650 |
After Ten Years | 0 |
Total short-term investments | 472,796 | $ 478,341
Commercial Paper [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 2,080 |
After One, Within Five Years | 0 |
After Five, Within Ten Years | 0 |
After Ten Years | 0 |
Total short-term investments | 2,080 |
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 45,350 |
After One, Within Five Years | 116,758 |
After Five, Within Ten Years | 23,132 |
After Ten Years | 0 |
Total short-term investments | 185,240 |
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 33,399 |
After One, Within Five Years | 107,050 |
After Five, Within Ten Years | 32,518 |
After Ten Years | 0 |
Total short-term investments | 172,967 |
Non-US [Member] | Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 107,788 |
After One, Within Five Years | 4,721 |
After Five, Within Ten Years | 0 |
After Ten Years | 0 |
Total short-term investments | $ 112,509 |

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- Definition Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 + Details
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