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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 25, 2017 | Jun. 26, 2016
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount | $ 0 |
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount | 0 |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 478,341 | $ 439,151
Long-term Investments | 50,366 | 40,179
Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 3,722 | 713
Short-term investments | 478,341 | 439,151
Long-term Investments | 50,366 | 40,179
Total assets | 532,429 | 480,043
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 1,184 | 576
Short-term investments | 0 | 0
Long-term Investments | 0 | 0
Total assets | 1,184 | 576
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 2,538 | 137
Short-term investments | 478,341 | 439,151
Long-term Investments | 50,366 | 40,179
Total assets | 531,245 | 479,467
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Short-term investments | 0 | 0
Long-term Investments | 0 | 0
Total assets | 0 | 0
Municipal bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 180,041 | 190,440
Municipal bonds | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 180,041 | 190,440
Municipal bonds | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Municipal bonds | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 180,041 | 190,440
Municipal bonds | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Corporate bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 177,721 | 168,767
Corporate bonds | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 177,721 | 168,767
Corporate bonds | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Corporate bonds | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 177,721 | 168,767
Corporate bonds | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
U.S. certificates of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 3,500
U.S. certificates of deposit | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 3,500
U.S. certificates of deposit | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
U.S. certificates of deposit | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 3,500
U.S. certificates of deposit | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Commercial paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 200 | 3,317
Commercial paper | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 200 | 3,317
Commercial paper | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Commercial paper | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 200 | 3,317
Commercial paper | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Non-U.S. certificates of deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 120,379 | 73,127
Non-U.S. certificates of deposit | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 120,379 | 73,127
Non-U.S. certificates of deposit | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Non-U.S. certificates of deposit | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 120,379 | 73,127
Non-U.S. certificates of deposit | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Common stock of non-U.S. corporations | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Long-term Investments | 50,366 | 40,179
Common stock of non-U.S. corporations | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Long-term Investments | 0 | 0
Common stock of non-U.S. corporations | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Long-term Investments | 50,366 | 40,179
Common stock of non-U.S. corporations | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Long-term Investments | 0 | 0
Municipal bonds | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 1,802 | 0
Municipal bonds | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Municipal bonds | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 1,802 | 0
Municipal bonds | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Non-U.S. certificates of deposit | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 736 | 137
Non-U.S. certificates of deposit | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Non-U.S. certificates of deposit | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 736 | 137
Non-U.S. certificates of deposit | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Money market funds | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 1,184 | 576
Money market funds | Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 1,184 | 576
Money market funds | Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Money market funds | Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount of investment in debt and equity 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=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 3: 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=66010992&loc=d3e26610-111562 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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