Debt - Components of Debt (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Line of Credit Facility [Line Items]
Debt, gross	$ 1,417,270
Total debt	1,375,141	$ 2,255,342
Current portion of long-term debt	(62,050)	(69,250)
Long-term debt, less current portion	$ 1,313,091	2,186,092
0.50% Convertible Senior Notes
Line of Credit Facility [Line Items]
Debt instrument, interest rate	0.50%
0.50% Convertible Senior Notes | Finisar Corporation
Line of Credit Facility [Line Items]
Debt, gross	$ 14,888	14,888
0.25% Convertible Senior Note Due 2022
Line of Credit Facility [Line Items]
Debt instrument, interest rate	0.25%
Debt, gross	$ 344,969	345,000
0.25% convertible senior notes unamortized discount attributable to cash conversion option and debt issuance costs including initial purchaser discount	(16,937)	(30,688)
Term A Loan Facility
Line of Credit Facility [Line Items]
Debt, gross	$ 1,057,412	1,194,463
Term A Loan Facility | LIBOR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	1.38%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt, gross	$ 0	74,000
Revolving Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	1.38%
Term A Facility and Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit facility unamortized debt issuance costs	$ (25,191)	(32,174)
Term B Loan Facility
Line of Credit Facility [Line Items]
Debt, gross	0	714,600
Credit facility unamortized debt issuance costs	$ 0	$ (24,747)
Term B Loan Facility | LIBOR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate	3.50%