INCOME TAXES (Provision (Benefit) For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 24, 2020	Jun. 26, 2019
Current income tax (benefit) expenses:
Federal	$ 11.6	$ (32.9)	$ 63.3
State	14.4	4.8	28.8
Foreign	0.0	0.0	0.6
Total current income tax (benefit) expenses	26.0	(28.1)	92.7
Deferred income tax (benefit) expenses:
Federal	(9.4)	8.8	(58.5)
State	(3.0)	(0.2)	(18.0)
Foreign	0.0	0.0	0.7
Total deferred income tax (benefit) expenses	(12.4)	8.6	(75.8)
Provision (benefit) for income taxes	$ 13.6	$ (19.5)	$ 16.9
Effective tax rate	9.40%	(398.00%)	9.80%