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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 26, 2016	Jun. 28, 2015
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	439,151	$ 573,481
Long-term Investments	40,179	57,595
Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	713	16,614
Short-term investments	439,151	573,481
Long-term Investments	40,179	57,595
Total assets	480,043	647,690
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	576	16,457
Short-term investments	0	0
Long-term Investments	0	0
Total assets	576	16,457
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	137	157
Short-term investments	439,151	573,481
Long-term Investments	40,179	57,595
Total assets	479,467	631,233
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	190,440	194,770
Municipal bonds | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	190,440	194,770
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	190,440	194,770
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	168,767	153,505
Corporate bonds | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	168,767	153,505
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	168,767	153,505
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	3,500
U.S. certificates of deposit | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,500	0
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	3,500	0
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	3,317
Commercial Paper | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	3,317	0
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	3,317	0
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	73,127	225,206
Non-U.S. certificates of deposit | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	73,127	225,206
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	73,127	225,206
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	40,179	57,595
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	40,179	57,595
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	0	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	0	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	137	157
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	137	157
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	576	16,457
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	576	16,457
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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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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