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		9 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Numerator:
Net income	$ 32.3	$ 33.7	$ 103.6	$ 134.3
Denominator:
Weighted-average common shares outstanding	103.8	102.7	103.8	101.7
Dilutive effect of share-based awards	1.3	1.8	1.3	2.8
Weighted-average dilutive shares outstanding	105.1	104.5	105.1	104.5
Basic earnings per share	$ 0.31	$ 0.33	$ 1.00	$ 1.32
Diluted earnings per share	$ 0.31	$ 0.32	$ 0.99	$ 1.29