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 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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FAIR VALUE - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Jun. 30, 2018	Sep. 30, 2017
Short-term Investments [Abstract]
Cash held in bank accounts, excluded	$ 337,920	$ 245,688	$ 192,420
Fair Value, Measurements, Recurring
Short-term Investments [Abstract]
Total assets measured at fair value	277,231	234,831
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Short-term Investments [Abstract]
Total assets measured at fair value	273,234	153,392
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Short-term Investments [Abstract]
Total assets measured at fair value	3,997	81,439
Commercial paper \| Fair Value, Measurements, Recurring
Short-term Investments [Abstract]
Short-term investments		41,401
Commercial paper \| Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Short-term Investments [Abstract]
Short-term investments		41,401
Corporate bonds \| Fair Value, Measurements, Recurring
Short-term Investments [Abstract]
Short-term investments		4,100
Corporate bonds \| Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Short-term Investments [Abstract]
Short-term investments		4,100
US Treasury securities \| Fair Value, Measurements, Recurring
Short-term Investments [Abstract]
Short-term investments	3,997	31,939
US Treasury securities \| Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Short-term Investments [Abstract]
Short-term investments	3,997	31,939
Money market funds
Short-term Investments [Abstract]
Cash held in bank accounts, excluded	273,234	153,392
Money market funds \| Fair Value, Measurements, Recurring
Cash and cash equivalents:
Cash and cash equivalents	273,234	153,392
Money market funds \| Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Cash and cash equivalents:
Cash and cash equivalents	273,234	153,392
Commercial paper
Short-term Investments [Abstract]
Cash held in bank accounts, excluded	0	3,999
Commercial paper \| Fair Value, Measurements, Recurring
Cash and cash equivalents:
Cash and cash equivalents		3,999
Commercial paper \| Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Cash and cash equivalents:
Cash and cash equivalents		3,999
Cash-in-bank
Short-term Investments [Abstract]
Cash held in bank accounts, excluded	$ 64,686	$ 88,297