Debt - Additional Information (Details)						1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 15, 2022	Jul. 01, 2022 USD ($)	Dec. 22, 2021 USD ($) shares	Dec. 21, 2021	Dec. 10, 2021 USD ($)	Aug. 31, 2017 USD ($) d $ / shares	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($) d $ / shares shares	Jun. 30, 2021 USD ($) $ / shares	Jun. 30, 2020 USD ($) $ / shares	Dec. 15, 2021 USD ($)	Nov. 01, 2021	Oct. 25, 2021 USD ($)	Jul. 01, 2021 USD ($)	Jun. 30, 2019 USD ($)
Line of Credit Facility [Line Items]
Debt issuance costs capitalized							$ (17,000,000)	$ (17,000,000)
Debt issuance costs								5,000,000
Cash, cash equivalents and restricted cash							2,582,371,000	2,582,371,000	$ 1,591,892,000	$ 493,046,000					$ 204,872,000
Current portion of long-term debt							403,212,000	403,212,000	62,050,000
Deferred taxes							(236,282,000)	(236,282,000)	(249,675,000)
Retained earnings							(1,348,125,000)	$ (1,348,125,000)	$ (1,136,777,000)
Basic earnings per share (in usd per share) | $ / shares								$ (1.57)	$ (2.50)	$ 0.79
Diluted earnings per common share (in usd per share) | $ / shares								$ (1.45)	$ (2.37)	$ 0.79
Available credit under lines of credit							$ 450,000,000	$ 450,000,000
Weighted average interest rate of total borrowings							2.00%	2.00%	1.00%
Amended and Restated Commitment Letter | Subsequent Event
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount		$ 4,000,000,000
5.00% Senior Notes due December 2029
Line of Credit Facility [Line Items]
Debt instrument, interest rate					5.00%		5.00%	5.00%
Aggregate principal amount					$ 990,000,000
Senior Notes
Line of Credit Facility [Line Items]
Cash, cash equivalents and restricted cash							$ 990,000,000	$ 990,000,000
Senior Notes | Subsequent Event
Line of Credit Facility [Line Items]
Redemption price, percentage	100.00%
0.50% Finisar Convertible Notes
Line of Credit Facility [Line Items]
Debt instrument, interest rate							0.50%	0.50%				0.50%
Redemption price, percentage				100.00%
Debt instrument, repurchase amount											$ 15,000,000
Debt conversion, shares issued | shares			45
Payment to settle conversion of debt and repurchase of notes			$ 300,000
0.25% Convertible Senior Note Due 2022
Line of Credit Facility [Line Items]
Interest expense							$ 875,000		$ 874,000	$ 876,000
Debt instrument, interest rate							0.25%	0.25%
Aggregate principal amount						$ 345,000,000
Interest expense							$ 2,822,000	$ 13,000,000	14,622,000	$ 14,048,000
Basic earnings per share (in usd per share) | $ / shares								$ (0.09)
Diluted earnings per common share (in usd per share) | $ / shares								$ 0.02
Debt instrument conversion, shares issued per $1,000 principal amount						0.02125
Debt instrument conversion, conversion price per share | $ / shares						$ 47.06
Debt instrument conversion, If-converted value of notes								$ 370,000,000	$ 532,000,000
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be convertible into common stock | d						20		20
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be convertible into common stock | d						30		30
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the notes to be convertible						130.00%		130.00%
Business day period						5 days
Measurement period						5 days
Measurement period percentage						98.00%
Total debt conversions								$ 3,000,000
Effective interest rate							1.00%	1.00%	5.00%	5.00%
0.25% Convertible Senior Note Due 2022 | Common Stock
Line of Credit Facility [Line Items]
Debt conversion, shares issued | shares								74,000
0.25% Convertible Senior Note Due 2022 | Cumulative Effect, Period of Adoption, Adjustment
Line of Credit Facility [Line Items]
Current portion of long-term debt														$ (15,000,000)
Deferred taxes														3,000,000
Retained earnings														$ 11,000,000
Debt Instrument, Redemption, Period One | 5.00% Senior Notes due December 2029
Line of Credit Facility [Line Items]
Redemption price, percentage					100.00%
Debt Instrument, Redemption, Period Two | 5.00% Senior Notes due December 2029
Line of Credit Facility [Line Items]
Redemption of principal amount, percentage					40.00%
Debt Instrument, Redemption, Period Three | 5.00% Senior Notes due December 2029
Line of Credit Facility [Line Items]
Redemption price, percentage					105.00%
Bank of America, N.A.
Line of Credit Facility [Line Items]
Swing loan sub-facility maximum initial borrowing capacity							$ 20,000,000	$ 20,000,000
Senior Secured Credit Facility | Minimum
Line of Credit Facility [Line Items]
Interest coverage ratio								3.00
Senior Secured Credit Facility | Federal Funds Rate
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate								0.50%
Senior Secured Credit Facility | Euro Rate Option
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate								1.00%
Senior Secured Credit Facility | First Four Fiscal Quarters After Closing Date | Maximum
Line of Credit Facility [Line Items]
Leverage ratio								5.00
Senior Secured Credit Facility | Fifth Fiscal Quarter Through Eighth Fiscal Quarter After Closing Date
Line of Credit Facility [Line Items]
Leverage ratio								4.50
Senior Secured Credit Facility | Subsequent Fiscal Quarter
Line of Credit Facility [Line Items]
Leverage ratio								4.00
Senior Secured Credit Facility | Bank of America, N.A.
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount							2,425,000,000	$ 2,425,000,000
Number of days credit facilities, outstanding become due and payable, prior to maturity of convertible notes								120 days
Term A Loan Facility | LIBOR
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate								1.375%
Term A Loan Facility | Bank of America, N.A.
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount							1,255,000,000	$ 1,255,000,000
Debt instrument term								5 years
Redemption of principal amount, percentage								1.25%
Term B Loan Facility | Bank of America, N.A.
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount							720,000,000	$ 720,000,000
Debt instrument term								7 years
Revolving Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount		$ 350,000,000
Revolving Credit Facility | LIBOR | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.00%
Revolving Credit Facility | LIBOR | Term A Facility and Revolving Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		0.00%
Revolving Credit Facility | LIBOR | Minimum | Term A Facility and Revolving Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		1.75%
Revolving Credit Facility | LIBOR | Maximum | Term A Facility and Revolving Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.50%
Revolving Credit Facility | Bank of America, N.A.
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount							450,000,000	$ 450,000,000
Debt instrument term								5 years
Letter of Credit | Subsequent Event
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount		$ 50,000,000
Letter of Credit | Bank of America, N.A.
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount							$ 25,000,000	$ 25,000,000
New Senior Credit Facilities | Amended and Restated Commitment Letter
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount													$ 5,000,000,000
New Term Loan A Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount		$ 850,000,000
New Term Loan A Credit Facility | LIBOR | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.00%
New Term Loan A Credit Facility | LIBOR | Term A Facility and Revolving Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		0.00%
New Term Loan A Credit Facility | LIBOR | Minimum | Term A Facility and Revolving Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		1.75%
New Term Loan A Credit Facility | LIBOR | Maximum | Term A Facility and Revolving Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.50%
New Term Facilities | Subsequent Event
Line of Credit Facility [Line Items]
Credit facility, aggregate principal amount		$ 2,800,000,000
New Term Loan B Credit Facility | New Term Loan B Credit Facility
Line of Credit Facility [Line Items]
Interest expense								34,000,000
New Term Loan B Credit Facility | LIBOR | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		2.75%
New Term Loan B Credit Facility | LIBOR | New Term Loan B Credit Facility | Subsequent Event
Line of Credit Facility [Line Items]
Debt instrument, rate added on variable rate		0.50%
Bridge Loan
Line of Credit Facility [Line Items]
Interest expense								$ 3,000,000
Aggregate principal amount					$ 990,000,000