Earnings Per Share - Schedule of Reconciliation of Numerators and Denominators for Basic and Diluted Earnings Per Share Computations (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 28, 2019	Sep. 29, 2018
Numerator:
Net income	$ 36.1	$ 28.2
Denominator:
Weighted-average common shares outstanding	104.0	103.5
Dilutive effect of share-based awards	1.6	1.6
Weighted-average dilutive shares outstanding	105.6	105.1
Basic earnings per share	$ 0.35	$ 0.27
Diluted earnings per share	$ 0.34	$ 0.27