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Operating Segments and Geographic Information - Information on Reportable Segments (Details)
$ in Millions
 3 Months Ended
Oct. 01, 2022
USD ($)
segment
Oct. 02, 2021
USD ($)
Information on reportable segments    
Number of broad business categories (in segment) | segment 2  
Total net revenue $ 310.2 $ 326.8
Gross profit $ 184.8 $ 195.0
Gross margin (as a percent) 59.60% 59.70%
Operating income $ 49.8 $ 46.9
Operating margin (as a percent) 16.10% 14.40%
Other Items    
Information on reportable segments    
Total net revenue $ 0.0 $ 0.0
Gross profit (8.6) (9.5)
Operating income (17.6) (27.4)
Network and Service Enablement | Segment Measures    
Information on reportable segments    
Total net revenue 218.9 227.9
Gross profit $ 141.6 $ 147.4
Gross margin (as a percent) 64.70% 64.70%
Operating income $ 28.8 $ 30.7
Operating margin (as a percent) 13.20% 13.50%
Network and Service Enablement | Network Enablement | Segment Measures    
Information on reportable segments    
Total net revenue $ 194.9 $ 204.9
Gross profit $ 125.6 $ 132.7
Gross margin (as a percent) 64.40% 64.80%
Network and Service Enablement | Service Enablement | Segment Measures    
Information on reportable segments    
Total net revenue $ 24.0 $ 23.0
Gross profit $ 16.0 $ 14.7
Gross margin (as a percent) 66.70% 63.90%
Optical Security and Performance Products | Segment Measures    
Information on reportable segments    
Total net revenue $ 91.3 $ 98.9
Gross profit $ 51.8 $ 57.1
Gross margin (as a percent) 56.70% 57.70%
Operating income $ 38.6 $ 43.6
Operating margin (as a percent) 42.30% 44.10%
Product revenue    
Information on reportable segments    
Total net revenue $ 267.7 $ 289.1
Product revenue | Other Items    
Information on reportable segments    
Total net revenue 0.0 0.0
Product revenue | Network and Service Enablement | Segment Measures    
Information on reportable segments    
Total net revenue 176.5 190.5
Product revenue | Network and Service Enablement | Network Enablement | Segment Measures    
Information on reportable segments    
Total net revenue 165.9 179.6
Product revenue | Network and Service Enablement | Service Enablement | Segment Measures    
Information on reportable segments    
Total net revenue 10.6 10.9
Product revenue | Optical Security and Performance Products | Segment Measures    
Information on reportable segments    
Total net revenue 91.2 98.6
Service revenue    
Information on reportable segments    
Total net revenue 42.5 37.7
Service revenue | Other Items    
Information on reportable segments    
Total net revenue 0.0 0.0
Service revenue | Network and Service Enablement | Segment Measures    
Information on reportable segments    
Total net revenue 42.4 37.4
Service revenue | Network and Service Enablement | Network Enablement | Segment Measures    
Information on reportable segments    
Total net revenue 29.0 25.3
Service revenue | Network and Service Enablement | Service Enablement | Segment Measures    
Information on reportable segments    
Total net revenue 13.4 12.1
Service revenue | Optical Security and Performance Products | Segment Measures    
Information on reportable segments    
Total net revenue $ 0.1 $ 0.3