Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 30, 2018	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017	Jun. 30, 2017
Income Taxes [Line Items]
Liability for uncertain tax positions including accrued interest and penalties	$ 2.2		$ 2.2		$ 2.0
Corporate effective income tax rate	6.20%	6.50%	6.30%	6.70%
Corporate income tax rate			21.00%		35.00%
Earliest Tax Year
Income Taxes [Line Items]
Tax year remain open to examination			2012
Latest Tax Year
Income Taxes [Line Items]
Tax year remain open to examination			2016