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Investments (Contractual Maturities of Short-term Investments by Type) (Details) - USD ($) $ in Thousands | Sep. 25, 2016 | Jun. 26, 2016
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | $ 168,826 |
After One, Within Five Years | 221,805 |
After Five, Within Ten Years | 70,576 |
After Ten Years | 0 |
Total | 461,207 | $ 439,151
Commercial Paper [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 3,802 |
Municipal Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 43,513 |
After One, Within Five Years | 110,598 |
After Five, Within Ten Years | 32,199 |
After Ten Years | 0 |
Total | 186,310 |
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 22,617 |
After One, Within Five Years | 108,207 |
After Five, Within Ten Years | 38,377 |
After Ten Years | 0 |
Total | 169,201 |
U.S. | Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 93,103 |
After One, Within Five Years | 0 |
After Five, Within Ten Years | 0 |
After Ten Years | 0 |
Total | 93,103 |
Non-US [Member] | Commercial Paper [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Total | 3,802 |
Non-US [Member] | Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Within One Year | 5,791 |
After One, Within Five Years | 3,000 |
After Five, Within Ten Years | 0 |
After Ten Years | 0 |
Total | $ 8,791 |

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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=6957658&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=73527792&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=73527792&loc=d3e27198-111563 + Details
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