Income Taxes - Schedule Effective Income Tax Rate from Continuing Operation (Detail) - USD ($) $ in Millions	12 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jun. 27, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal income tax expense (benefit) computed at statutory rate	$ 35.1	$ 11.5	$ (46.7)
State income taxes, net of federal income tax benefit	13.1	4.1	(10.7)
Non-deductible expenses and other	9.6	2.1	2.0
Net Operating Loss Carryback - Rate Differential	0.0	(2.1)	(46.3)
Stock-based compensation	(1.9)	(1.5)	(4.6)
Other	(1.3)	(0.1)	(1.8)
Total income tax expense (benefit), net	$ 54.6	$ 14.0	$ (108.1)