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Contingencies - Lease Guarantee (Details) - USD ($)
$ in Millions
6 Months Ended
Dec. 26, 2018
Jun. 27, 2018
Guarantor Obligations [Line Items]    
Loss Contingency, Estimate of Possible Loss $ 5.0  
Payments for Legal Settlements 0.7  
Lease Guarantees And Secondary Obligations [Member]    
Guarantor Obligations [Line Items]    
Loss Contingency, Accrual, Current $ 0.6 $ 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 $ 57.5 $ 58.2