Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018	Dec. 30, 2017	Jun. 30, 2018
Income Tax Disclosure [Abstract]
U.S. federal corporate income tax rate	21.00%	28.00%	21.00%	28.00%	35.00%
Effective income tax rate	26.10%	24.80%	23.40%	(16.70%)
Net deferred tax assets	$ 29.2		$ 29.2			$ 29.2
Net deferred tax liabilities	136.3		136.3			135.5
Deferred Tax Assets, Valuation Allowance	0.4		0.4			0.4
Unrecognized tax benefits	$ 1.1		1.1			$ 1.2
Decrease in unrecognized tax benefits			$ 0.6