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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2024
Jun. 25, 2023
Jun. 26, 2022
Jun. 27, 2021
Operating Loss Carryforwards [Line Items]        
Valuation allowance of deferred tax assets $ 734.1 $ 543.9    
Federal net operating loss carryforward 2,300.0      
State net operating loss carryforwards 495.1      
Foreign net operating loss carryforward 1.9      
Unrecognized tax benefits 9.4 9.8 $ 7.2 $ 7.4
Increase (decrease) in unrecognized tax benefits (0.4)      
Expiration of statute of limitations for assessment of taxes 2.0 0.1 0.2  
Estimated change in gross unrecognized tax benefits 0.4      
Interest and penalties expense related to unrecognized tax benefits (less than) 0.1 0.1 $ 0.1  
Interest and penalties accrued related to unrecognized tax benefits (less than) 0.1 0.1    
Undistributed earnings of foreign subsidiaries 206.6      
Undistributed earnings of foreign subsidiaries expected to be repatriated 189.7      
Foreign income taxes incurred 6.9      
Undistributed foreign earnings on which income taxes have not been provided 16.9      
Income tax expense (benefit) if foreign earnings are repatriated 0.2      
Domestic Tax Authority        
Operating Loss Carryforwards [Line Items]        
Valuation allowance of deferred tax assets   $ 543.9    
Increase in valuation allowance of operating loss carryforward 190.1      
Net operating loss carryforward subject to expiration 145.0      
Tax credit carryforward 110.0      
State and Local Jurisdiction        
Operating Loss Carryforwards [Line Items]        
Tax credit carryforward 0.7      
Foreign Tax Authority        
Operating Loss Carryforwards [Line Items]        
Valuation allowance of deferred tax assets 0.1      
Valuation allowance of net operating loss carryforwards $ 0.3