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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 27, 2020
Dec. 31, 2017
Jun. 27, 2020
Jun. 29, 2019
Jun. 30, 2018
Jun. 30, 2018
Jul. 01, 2019
Jun. 24, 2017
Income Tax Disclosure [Line Items]                
U.S. federal corporate tax rate 21.00% 35.00% 21.00% 21.00%   28.17%    
Net deferred tax assets $ 28.7   $ 28.7 $ 31.1        
Valuation allowance 33.3   33.3 30.4        
Net increase in valuation allowance     2.9          
Undistributed earnings of foreign subsidiaries accounted for one-time transition tax 1.0   1.0          
Gross unrecognized tax benefits 20.1   20.1 18.9 $ 24.8 $ 24.8 $ 18.9 $ 15.2
Gross unrecognized tax benefits decreased during the year       1.2        
Unrecognized tax benefit, reduction of effective tax rate if recognized       12.6        
Increase (decrease) in interest and penalties accrued related to unrecognized tax benefits           $ 0.7    
Interest and penalties accrued related to unrecognized tax benefits 1.9   1.9 1.9        
Estimated decrease in unrecognized tax benefit in next 12 months 1.7   1.7          
Estimated increase in unrecognized tax benefit in next 12 months 2.3   2.3          
Federal [Member]                
Income Tax Disclosure [Line Items]                
Net operating loss carryforwards 1.5   1.5          
Tax credit carryforward, amount 14.0   14.0          
State and Local Jurisdiction [Member]                
Income Tax Disclosure [Line Items]                
Net operating loss carryforwards 46.2   46.2          
Net operating loss, beginning of expiration period         2021      
Tax credit carryforward, amount 38.5   38.5          
Other Assets [Member]                
Income Tax Disclosure [Line Items]                
Net deferred tax assets $ 28.7   $ 28.7 $ 31.1