CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Total Equity - Controlled Interest	Total Equity - Controlled Interest Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income	Non-controlling Interest from Discontinued Operations
Balance at beginning of period (shares) at Jun. 28, 2020					109,230
Balance at beginning of period at Jun. 28, 2020	$ 2,089.2		$ 2,083.1		$ 0.1	$ 3,106.2		$ (1,039.2)		$ 16.0	$ 6.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(522.5)		(523.9)					(523.9)			1.4
Reclassification of currency translation gain to loss on sale of discontinued operations	(9.5)		(9.5)							(9.5)
Unrealized gain (loss) on available-for-sale securities	(3.8)		(3.8)							(3.8)
Tax withholding on vested equity awards	(36.2)		(36.2)			(36.2)
Stock-based compensation	67.1		67.1			67.1
Exercise of stock options and issuance of shares (in shares)					2,238
Exercise of stock options and issuance of shares	50.6		50.6			50.6
Issuance of shares under the at-the-market offering program, net of issuance costs (shares)					4,223
Issuance of shares under the at-the-market offering program, net of issuance costs	489.1		489.1			489.1
Reclassification of noncontrolling interest to loss on sale of discontinued operations	(7.5)										(7.5)
Balance at end of period (shares) at Jun. 27, 2021					115,691
Balance at end of period at Jun. 27, 2021	2,116.5		2,116.5		$ 0.1	3,676.8		(1,563.1)		2.7	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(200.9)		(200.9)					(200.9)
Reclassification of currency translation gain to loss on sale of discontinued operations	0.0
Unrealized gain (loss) on available-for-sale securities	(28.0)		(28.0)							(28.0)
Tax withholding on vested equity awards	(29.1)		(29.1)			(29.1)
Stock-based compensation	62.8		62.8			62.8
Exercise of stock options and issuance of shares (in shares)					978
Exercise of stock options and issuance of shares	22.4		22.4			22.4
Issuance of shares related to the extinguishment of convertible notes due September 1, 2023 (in shares)					7,126
Issuance of shares related to the extinguishment of convertible notes due September 1, 2023	416.2		416.2		$ 0.1	416.1
Issuance of convertible notes due February 15, 2028	187.6		187.6			187.6
Capped call transactions related to the issuance of convertible notes	$ (108.2)		(108.2)			(108.2)
Balance at end of period (shares) at Jun. 26, 2022	123,795				123,795
Balance at end of period at Jun. 26, 2022	$ 2,439.3	$ (303.3)	2,439.3	$ (303.3)	$ 0.2	4,228.4	$ (333.0)	(1,764.0)	$ 29.7	(25.3)	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(329.9)		(329.9)					(329.9)
Reclassification of currency translation gain to loss on sale of discontinued operations	0.0
Unrealized gain (loss) on available-for-sale securities	0.2		0.2							0.2
Tax withholding on vested equity awards	(19.2)		(19.2)			(19.2)
Stock-based compensation	84.9		84.9			84.9
Exercise of stock options and issuance of shares (in shares)					999
Exercise of stock options and issuance of shares	23.8		23.8			23.8
Capped call transactions related to the issuance of convertible notes	$ (273.9)		(273.9)			(273.9)
Balance at end of period (shares) at Jun. 25, 2023	124,794				124,794
Balance at end of period at Jun. 25, 2023	$ 1,621.9		$ 1,621.9		$ 0.2	$ 3,711.0		$ (2,064.2)		$ (25.1)	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2020-06 [Member]