v3.26.1
Operating Segments and Geographic Information - Summary of Reportable Segments (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 27, 2026
Jun. 28, 2025
Jun. 29, 2024
Information on reportable segments      
Net revenue $ 1,518.3 $ 1,084.3 $ 1,000.4
Total cost of revenues 642.9 463.2 424.5
Research and development 262.7 208.7 201.9
Selling, general and administrative 469.2 349.4 333.3
Total operating expenses 770.3 563.6 555.1
Income from operations 105.1 57.5 20.8
Unallocated other expenses 105.1 57.5 20.8
Loss on debt extinguishment (Note 11) (56.7) 0.0 0.0
Interest and other income, net 15.3 11.1 21.7
Interest expense (47.4) (30.0) (30.9)
Income before income taxes and equity investment earnings 16.3 38.6 11.6
Inventories, net 155.3 117.9 96.5
Prepayments and other current assets 22.0 5.8 5.6
Assets not allocated to segments 2,705.6 1,993.8 1,736.3
Total assets 2,705.6 1,993.8 1,736.3
Product      
Information on reportable segments      
Net revenue 1,324.6 912.0 834.8
Service      
Information on reportable segments      
Net revenue 193.7 172.3 165.6
Operating Segments      
Information on reportable segments      
Net revenue 1,518.3 1,084.3 1,000.4
Total cost of revenues
Research and development
Selling, general and administrative
Other
Total operating expenses
Income from operations 312.9 155.2 116.0
Unallocated other expenses 312.9 155.2 116.0
Operating Segments | Product      
Information on reportable segments      
Net revenue 1,324.6 912.0 834.8
Operating Segments | Service      
Information on reportable segments      
Net revenue 193.7 172.3 165.6
Operating Segments | Network and Service Enablement      
Information on reportable segments      
Net revenue 1,182.9 776.6 702.0
Total cost of revenues 420.9 288.6 262.3
Research and development 231.1 179.0 173.4
Selling, general and administrative 219.5 165.3 160.5
Other 121.4 101.1 97.1
Total operating expenses 572.0 445.4 431.0
Income from operations $ 190.0 $ 42.6 $ 8.7
Operating margin (percent) 16.10% 5.50% 1.20%
Unallocated other expenses $ 190.0 $ 42.6 $ 8.7
Inventories, net 113.7 74.4  
Prepayments and other current assets 22.0 5.8 5.6
Operating Segments | Network and Service Enablement | Product      
Information on reportable segments      
Net revenue 989.2 604.3 536.4
Inventories, net     53.1
Operating Segments | Network and Service Enablement | Service      
Information on reportable segments      
Net revenue 193.7 172.3 165.6
Operating Segments | OSP      
Information on reportable segments      
Net revenue 335.4 307.7 298.4
Total cost of revenues 160.2 144.1 143.4
Research and development 13.5 17.2 16.4
Selling, general and administrative 25.8 23.7 23.1
Other 13.0 10.1 8.2
Total operating expenses 52.3 51.0 47.7
Income from operations $ 122.9 $ 112.6 $ 107.3
Operating margin (percent) 36.60% 36.60% 36.00%
Unallocated other expenses $ 122.9 $ 112.6 $ 107.3
Inventories, net 41.6 43.5  
Prepayments and other current assets 0.0 0.0 0.0
Operating Segments | OSP | Product      
Information on reportable segments      
Net revenue 335.4 307.7 298.4
Inventories, net     43.4
Operating Segments | OSP | Service      
Information on reportable segments      
Net revenue 0.0 0.0 0.0
Other Items      
Information on reportable segments      
Income from operations 207.8 97.7 95.2
Unallocated other expenses 207.8 97.7 95.2
Assets not allocated to segments 2,528.3 1,870.1 1,634.2
Total assets $ 2,528.3 $ 1,870.1 $ 1,634.2