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Fair Value of Financial Instruments (Financial Instruments Carried at Fair Value) (Details) - USD ($) $ in Thousands | Sep. 23, 2018 | Jun. 24, 2018
--- | --- | ---
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | $ 329,223 | $ 268,161
Other long-term investments | 50,240 | 57,501
Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 153,009 | 77,766
Short-term investments | 329,223 | 268,161
Other long-term investments | 50,240 | 57,501
Total assets | 532,472 | 403,428
Variable Rate Demand Obligation [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 400 | 0
Variable Rate Demand Obligation [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 400 | 0
US Treasury Securities [Member] |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 44,234 | 0
US Treasury Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 44,234 | 0
Municipal Bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 102,916 | 109,276
Municipal Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 102,916 | 109,276
Corporate Bonds |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 145,402 | 76,757
Corporate Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 145,402 | 76,757
US Government Agencies Debt Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 4,657 | 3,884
US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 4,657 | 3,884
Common stock of non-U.S. corporations | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Other long-term investments | 50,240 | 57,501
Commercial Paper |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 1,978 | 0
Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 1,978 | 0
Corporate Bond Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 2,499 | 0
US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 1,500 | 275
Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 2,000 |
Money Market Funds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 10,157 | 1,992
Non-US | Certificates of Deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 29,136 | 77,744
Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 29,136 | 77,744
Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 136,853 | 75,499
UNITED STATES | Certificates of Deposit |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 500 | 500
UNITED STATES | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 500 | 500
Level 1 | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 10,157 | 1,992
Short-term investments | 44,234 | 3,884
Other long-term investments | 0 | 0
Total assets | 54,391 | 5,876
Level 1 | Variable Rate Demand Obligation [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 1 | US Treasury Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 44,234 | 0
Level 1 | Municipal Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 1 | Corporate Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 1 | US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 3,884
Level 1 | Common stock of non-U.S. corporations | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Other long-term investments | 0 | 0
Level 1 | Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 1 | Corporate Bond Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 1 | US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 1 | Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 1 | Money Market Funds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 10,157 | 1,992
Level 1 | Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 1 | Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 1 | UNITED STATES | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 2 | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 142,852 | 75,774
Short-term investments | 284,989 | 264,277
Other long-term investments | 50,240 | 57,501
Total assets | 478,081 | 397,552
Level 2 | Variable Rate Demand Obligation [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 400 | 0
Level 2 | US Treasury Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 2 | Municipal Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 102,916 | 109,276
Level 2 | Corporate Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 145,402 | 76,757
Level 2 | US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 4,657 | 0
Level 2 | Common stock of non-U.S. corporations | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Other long-term investments | 50,240 | 57,501
Level 2 | Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 1,978 | 0
Level 2 | Corporate Bond Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 2,499 | 0
Level 2 | US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 1,500 | 0
Level 2 | Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 2,000 | 275
Level 2 | Money Market Funds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 2 | Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 29,136 | 77,744
Level 2 | Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 136,853 | 75,499
Level 2 | UNITED STATES | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 500 | 500
Level 3 | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Short-term investments | 0 | 0
Other long-term investments | 0 | 0
Total assets | 0 | 0
Level 3 | Variable Rate Demand Obligation [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 3 | US Treasury Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 3 | Municipal Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 3 | Corporate Bonds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 3 | US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 3 | Common stock of non-U.S. corporations | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Other long-term investments | 0 | 0
Level 3 | Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 3 | Corporate Bond Securities [Member] | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 3 | US Government Agencies Debt Securities | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 3 | Commercial Paper | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 3 | Money Market Funds | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 3 | Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | 0 | 0
Level 3 | Non-US | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents | 0 | 0
Level 3 | UNITED STATES | Certificates of Deposit | Fair value of assets and liabilities measured on a recurring basis |  |
Assets, Fair Value Disclosure [Abstract] |  |
Short-term investments | $ 0 | $ 0

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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 No definition available. + Details
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