Earnings Per Common Share - Schedule of Reconciliation of Numerators and Denominators for Basic and Diluted Earnings Per Common Share Computations (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jun. 27, 2020
Numerator:
Net income (loss)	$ 112.5	$ 40.7	$ (114.1)
Denominator:
Weighted-average common shares outstanding	149,800,000	132,100,000	113,000,000.0
Dilutive effect of potential common shares	1,500,000	1,300,000	0
Weighted-average dilutive shares outstanding	151,300,000	133,400,000	113,000,000.0
Basic earnings (loss) per common share	$ 0.75	$ 0.31	$ (1.01)
Diluted earnings (loss) per common share	$ 0.74	$ 0.30	$ (1.01)