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Investments (Contractual Maturities of Short-term Investments by Type) (Details) - USD ($) $ in Thousands | Dec. 24, 2017 | Jun. 25, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | $ 123,284 |
After One, Within Five Years | 239,320 |
After Five, Within Ten Years | 97,460 |
After Ten Years | 20,157 |
Total short-term investments | 480,221 | $ 478,341
Commercial Paper [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 2,088 |
After One, Within Five Years | 0 |
After Five, Within Ten Years | 0 |
After Ten Years | 0 |
Total short-term investments | 2,088 |
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 1,526 |
After One, Within Five Years | 130,557 |
After Five, Within Ten Years | 35,186 |
After Ten Years | 11,506 |
Total short-term investments | 178,775 |
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 4,759 |
After One, Within Five Years | 97,126 |
After Five, Within Ten Years | 62,274 |
After Ten Years | 8,651 |
Total short-term investments | 172,810 |
US Government Agencies Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 0 |
After One, Within Five Years | 3,914 |
After Five, Within Ten Years | 0 |
After Ten Years | 0 |
Total short-term investments | 3,914 |
Non-US [Member] | Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 114,911 |
After One, Within Five Years | 7,723 |
After Five, Within Ten Years | 0 |
After Ten Years | 0 |
Total short-term investments | $ 122,634 |

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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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