Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 24, 2017
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 1.8	$ 2.6
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	62,889,679	60,579,911
Common stock, shares outstanding	35,249,803	34,638,435
Common treasury shares	27,639,876	25,941,476

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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