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Income Taxes - Reconciliations of Income Taxes at Statutory Federal Income Tax Rate (Detail)
12 Months Ended
Jun. 27, 2019
Jun. 28, 2018
Jun. 29, 2017
Income Tax Disclosure [Abstract]      
Federal statutory income tax rate 21.00% 28.10% 35.00%
State income taxes, net of federal benefit 3.10% 3.10% 3.30%
Impact of Tax Reform   6.30%  
Section 162(m) Limitation 1.10%    
Research and development tax credit (0.30%) (0.20%) (0.10%)
Domestic manufacturing deduction   (2.20%) (3.10%)
Windfall tax benefits (0.20%) (1.00%) (1.80%)
Uncertain tax positions 0.10% 0.10% 0.10%
Other (0.10%) (0.10%) (0.10%)
Effective tax rate 24.70% 34.10% 33.30%