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Contingencies - Lease Guarantee (Details) - USD ($)
$ in Millions
9 Months Ended
Mar. 27, 2019
Jun. 27, 2018
Guarantor Obligations [Line Items]    
Loss contingency, estimate of possible loss $ 5.0  
Payments for legal settlements 0.9  
Lease Guarantees And Secondary Obligations [Member]    
Guarantor Obligations [Line Items]    
Loss contingency, accrual, current $ 0.4 $ 1.4
Description of material contingencies of registrant No other liabilities related to this matter have been recorded  
Maximum [Member] | Lease Guarantees And Secondary Obligations [Member]    
Guarantor Obligations [Line Items]    
Loss contingency, estimate of possible loss $ 58.4 $ 58.2