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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