Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Mar. 25, 2023	Dec. 24, 2022	Sep. 24, 2022	Mar. 26, 2022	Dec. 25, 2021	Sep. 25, 2021	Mar. 25, 2023	Mar. 26, 2022
Numerator:
Net income	$ 10.4	$ 22.0	$ 64.6	$ 64.9	$ 69.5	$ 40.2	$ 97.0	$ 174.6
Denominator:
Shares, basic	39.4			39.5			39.7	38.8
Effect of dilutive share-based awards and convertible notes	0.5			1.2			0.6	1.9
Diluted	39.9			40.7			40.3	40.7
Net income per share:
Basic	$ 0.26			$ 1.64			$ 2.44	$ 4.50
Diluted	$ 0.26			$ 1.59			$ 2.41	$ 4.29