v3.26.1
Restructuring - Summary of Restructuring Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 27, 2026
Jun. 28, 2025
Jun. 29, 2024
Summary of various restructuring plans      
Accrual balance at the beginning of the period $ 3.5    
Restructuring and related charges 15.9 $ 0.7 $ 13.6
Cash settlements (12.7)    
Foreign currency translation adjustments (0.2)    
Accrual balance at the end of the period 6.5 3.5  
Fiscal 2026 Plan      
Summary of various restructuring plans      
Accrual balance at the beginning of the period 0.0    
Restructuring and related charges 16.4    
Cash settlements (9.7)    
Foreign currency translation adjustments (0.2)    
Accrual balance at the end of the period 6.5 0.0  
Fiscal 2026 Plan | Network and Service Enablement      
Summary of various restructuring plans      
Accrual balance at the beginning of the period 0.0    
Restructuring and related charges 14.4    
Cash settlements (8.8)    
Foreign currency translation adjustments (0.2)    
Accrual balance at the end of the period 5.4 0.0  
Fiscal 2026 Plan | OSP      
Summary of various restructuring plans      
Accrual balance at the beginning of the period 0.0    
Restructuring and related charges 2.0    
Cash settlements (0.9)    
Foreign currency translation adjustments 0.0    
Accrual balance at the end of the period 1.1 0.0  
Fiscal 2024 Plan      
Summary of various restructuring plans      
Accrual balance at the beginning of the period 3.5    
Restructuring and related charges (0.5) 0.9 $ 14.8
Cash settlements (3.0)    
Foreign currency translation adjustments 0.0    
Accrual balance at the end of the period 0.0 3.5  
Fiscal 2024 Plan | OSP      
Summary of various restructuring plans      
Accrual balance at the beginning of the period 3.5    
Restructuring and related charges (0.5)    
Cash settlements (3.0)    
Foreign currency translation adjustments 0.0    
Accrual balance at the end of the period $ 0.0 $ 3.5