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Investments, Forward Contracts and Fair Value Measurements - Additional Information (Details) - USD ($) shares in Millions |  | 12 Months Ended
--- | --- | ---
Oct. 30, 2018 | Jun. 29, 2019 | Jun. 30, 2018 | Jul. 01, 2017
Investments |  |  |  |
Total debt available-for-sale securities |  | $ 600,000 | $ 189,600,000 |
Other-than-temporary impairment charges |  | 0 | 0 | $ 0
Contingent consideration liability, up to |  | $ 63,000,000.0 |  |
Contingent consideration period |  | 4 years |  |
Contingent consideration liability |  | $ 38,400,000 |  |
Change in fair value of contingent liability |  | 5,900,000 | 0 | $ 0
Not designated | Foreign exchange forward contracts |  |  |  |
Investments |  |  |  |
Derivative asset, fair value |  | 1,200,000 |  |
Derivative liability, fair value |  | 4,000,000.0 |  |
Loss on derivatives |  | $ 6,900,000 | 800,000 |
Not designated | Foreign exchange forward contracts | Held to purchase |  |  |  |
Investments |  |  |  |
Derivative term |  | 120 days |  |
Notional amount of forward contracts |  | $ 117,800,000 | 167,500,000 |
Not designated | Foreign exchange forward contracts | Held to sell |  |  |  |
Investments |  |  |  |
Notional amount of forward contracts |  | 31,300,000 | 28,600,000 |
Short-term investments |  |  |  |
Investments |  |  |  |
Deferred compensation plan assets |  | 1,500,000 | 1,600,000 |
Short-term investments | Debt securities |  |  |  |
Investments |  |  |  |
Deferred compensation plan assets |  | 400,000 |  |
Short-term investments | Money market funds |  |  |  |
Investments |  |  |  |
Deferred compensation plan assets |  | 300,000 |  |
Short-term investments | Marketable equity securities |  |  |  |
Investments |  |  |  |
Deferred compensation plan assets |  | 800,000 |  |
Cash equivalents |  |  |  |
Investments |  |  |  |
Total debt available-for-sale securities |  |  | 21,200,000 |
Short-term investments |  |  |  |
Investments |  |  |  |
Total debt available-for-sale securities |  |  | 167,700,000 |
Other non-current assets |  |  |  |
Investments |  |  |  |
Total debt available-for-sale securities |  | 600,000 | 700,000 |
Money market funds | Short-term investments |  |  |  |
Investments |  |  |  |
Deferred compensation plan assets |  |  | 300,000 |
Marketable equity securities | Short-term investments |  |  |  |
Investments |  |  |  |
Deferred compensation plan assets |  |  | 900,000 |
Debt securities | Short-term investments |  |  |  |
Investments |  |  |  |
Deferred compensation plan assets |  |  | $ 400,000 |
RPC Photonics, Inc. |  |  |  |
Investments |  |  |  |
Contingent consideration liability, up to | $ 53,000,000.0 |  |  |
Contingent consideration period | 4 years |  |  |
Contingent consideration liability | $ 36,200,000 | 30,300,000 |  |
Change in fair value of contingent liability |  | $ 5,900,000 |  |
Lumentum |  |  |  |
Investments |  |  |  |
Equity securities sold (in shares) |  |  |  | 7.2
Gain on sale of investments |  |  |  | $ 203,000,000.0
Tax effect on sale of investments |  |  |  | $ 0

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