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, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 28, 2024	Dec. 30, 2023
Numerator:
Net Income (Loss)	$ 42.4	$ 78.3	$ 150.4	$ 199.0
Denominator:
Weighted-average common shares outstanding	154.6	154.2	154.6	154.5
Dilutive effect of potential common shares	1.7	1.5	1.7	1.7
Weighted-average dilutive common shares outstanding	156.3	155.7	156.3	156.2
Basic earnings per common share	$ 0.27	$ 0.51	$ 0.97	$ 1.29
Diluted earnings per common share	$ 0.27	$ 0.5	$ 0.96	$ 1.27