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Schedule of Potential Shares of Common Stock Excluded from the Calculation of Diluted Net Income Per Share (Parenthetical) (Detail) |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 24, 2019 | Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2018
0.25% Convertible Senior Note Due 2022 |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Debt instrument, interest rate |  | 0.25% | 0.25% | 0.25%
Debt instrument maturity date |  | Sep. 01, 2022 |  |
0.50% Finisar Convertible Notes |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Debt instrument, interest rate | 0.50% | 0.50% |  |
Debt instrument maturity date | Dec. 15, 2036 |  |  |

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