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Consolidated Statements of Stockholders Equity - USD ($) $ in Millions	Total	Cumulative Effect of Changes in Accounting Principles for Leases [Member]	As Adjusted [Member]	Common Stock [Member]	Common Stock [Member] As Adjusted [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] As Adjusted [Member]	Treasury Stock [Member]	Treasury Stock [Member] As Adjusted [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect of Changes in Accounting Principles for Leases [Member]	Retained Earnings [Member] As Adjusted [Member]
Balance, value at Jun. 30, 2018	$ 729.3			$ 0.1		$ 1,195.2		$ (1,073.9)		$ 1.5	$ 606.4
Balance, shares at Jun. 30, 2018				62,889,679
Net income/(loss)	(22.9)										(22.9)
Other comprehensive income	(1.5)									$ (1.5)
Issuance of common stock for share-based award compensation plans	21.3					21.3
Issuance of common stock for share-based award compensation plans, shares				1,394,269
Payroll taxes for deferred stock units	(9.4)					(9.4)
Purchases of treasury stock	(118.5)							(118.5)
Share-based compensation	59.0					59.0
Balance, value at Jun. 29, 2019	657.3	$ (0.9)	$ 656.4	$ 0.1	$ 0.1	1,266.1	$ 1,266.1	(1,192.4)	$ (1,192.4)		583.5	$ (0.9)	$ 582.6
Balance, shares at Jun. 29, 2019				64,283,948	64,283,948
Net income/(loss)	118.8										118.8
Issuance of common stock for share-based award compensation plans	34.5					34.5
Issuance of common stock for share-based award compensation plans, shares				1,587,700
Payroll taxes for deferred stock units	(9.7)					(9.7)
Purchases of treasury stock	(30.2)							(30.2)
Share-based compensation	49.3					49.3
Balance, value at Jun. 27, 2020	819.1			$ 0.1		1,340.2		(1,222.6)			701.4
Balance, shares at Jun. 27, 2020				65,871,648
Net income/(loss)	79.6										79.6
Issuance of common stock for share-based award compensation plans	27.8					27.8
Issuance of common stock for share-based award compensation plans, shares				1,091,358
Treasury stock issued for redemption of convertible notes	(0.3)					(17.5)		17.2
Payroll taxes for deferred stock units	(28.3)					(28.3)
Share-based compensation	69.3					69.3
Balance, value at Jun. 26, 2021	$ 967.2			$ 0.1		$ 1,391.5		$ (1,205.4)			$ 781.0
Balance, shares at Jun. 26, 2021				66,963,006

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