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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 24, 2018	Jun. 25, 2017
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	268,161	$ 478,341
Long-term Investments	57,501	50,366
Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	77,766	3,722
Short-term investments	268,161	478,341
Long-term Investments	57,501	50,366
Total assets	403,428	532,429
Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	1,992	1,184
Short-term investments	3,884	0
Long-term Investments	0	0
Total assets	5,876	1,184
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	75,774	2,538
Short-term investments	264,277	478,341
Long-term Investments	57,501	50,366
Total assets	397,552	531,245
Significant Unobservable Inputs (Level 3) | 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
Commercial Paper | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Commercial Paper | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	275	0
Commercial Paper | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Municipal bonds
Assets, Fair Value Disclosure [Abstract]
Short-term investments	109,276	180,041
Municipal bonds | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	109,276	180,042
Municipal bonds | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Municipal bonds | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	109,276	180,042
Municipal bonds | Significant Unobservable Inputs (Level 3) | 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	76,757	177,721
Corporate bonds | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	76,757	177,721
Corporate bonds | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Corporate bonds | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	76,757	177,721
Corporate bonds | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
U.S. agency securities
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,884	0
U.S. agency securities | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,884	0
U.S. agency securities | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,884	0
U.S. agency securities | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
U.S. agency securities | Significant Unobservable Inputs (Level 3) | 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	0	200
Commercial paper | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	200
Commercial paper | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Commercial paper | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	200
Commercial paper | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Certificates of deposit | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	77,744	120,379
Certificates of deposit | United States
Assets, Fair Value Disclosure [Abstract]
Short-term investments	500	0
Certificates of deposit | Fair Value, Measurements, Recurring [Member] | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	77,744	120,378
Certificates of deposit | Fair Value, Measurements, Recurring [Member] | United States
Assets, Fair Value Disclosure [Abstract]
Short-term investments	500	0
Certificates of deposit | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member] | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Certificates of deposit | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member] | United States
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Certificates of deposit | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	77,744	120,378
Certificates of deposit | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | United States
Assets, Fair Value Disclosure [Abstract]
Short-term investments	500	0
Certificates of deposit | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member] | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Certificates of deposit | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member] | United States
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	57,501	50,366
Common stock of non-U.S. corporations | Quoted Prices in Active Markets for Identical Items (Level 1) | 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) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Long-term Investments	57,501	50,366
Common stock of non-U.S. corporations | Significant Unobservable Inputs (Level 3) | 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	0	1,802
Municipal bonds | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Municipal bonds | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	1,802
Municipal bonds | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Certificates of deposit | Fair Value, Measurements, Recurring [Member] | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	75,499	736
Certificates of deposit | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member] | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Certificates of deposit | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member] | Non-US [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	75,499	736
Certificates of deposit | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member] | Non-US [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	1,992	1,184
Money market funds | Quoted Prices in Active Markets for Identical Items (Level 1) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	1,992	1,184
Money market funds | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Money market funds | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Commercial Paper | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$ 275	$ 0

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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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.

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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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