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Operating Segments and Geographic Information - Information on Reportable Segments (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 03, 2021 USD ($) | Mar. 28, 2020 USD ($) | Apr. 03, 2021 USD ($) segment | Mar. 28, 2020 USD ($)
Information on reportable segments |  |  |  |
Number of broad business categories (in segment) | segment |  |  | 2 |
Total net revenue | $ 303.4 | $ 256.2 | $ 888.0 | $ 869.7
Gross profit | $ 182.0 | $ 146.8 | $ 531.5 | $ 510.7
Gross margin (as a percent) | 60.00% | 57.30% | 59.90% | 58.70%
Operating income | $ 35.9 | $ 9.1 | $ 109.5 | $ 74.8
Operating margin (as a percent) | 11.80% | 3.60% | 12.30% | 8.60%
Other Items |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0
Gross profit | (9.4) | (9.9) | (28.0) | (29.1)
Operating income | (25.5) | (28.9) | (79.3) | (83.8)
Network and Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 211.2 | 187.0 | 601.4 | 641.0
Gross profit | $ 135.5 | $ 120.3 | $ 384.2 | $ 416.5
Gross margin (as a percent) | 64.20% | 64.30% | 63.90% | 65.00%
Operating income | $ 20.9 | $ 13.8 | $ 56.4 | $ 73.6
Operating margin (as a percent) | 9.90% | 7.40% | 9.40% | 11.50%
Network and Service Enablement | Network Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 190.9 | $ 163.9 | $ 533.9 | $ 565.8
Gross profit | $ 123.1 | $ 104.3 | $ 339.9 | $ 367.1
Gross margin (as a percent) | 64.50% | 63.60% | 63.70% | 64.90%
Network and Service Enablement | Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 20.3 | $ 23.1 | $ 67.5 | $ 75.2
Gross profit | $ 12.4 | $ 16.0 | $ 44.3 | $ 49.4
Gross margin (as a percent) | 61.10% | 69.30% | 65.60% | 65.70%
Optical Security and Performance Products | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 92.2 | $ 69.2 | $ 286.6 | $ 228.7
Gross profit | $ 55.9 | $ 36.4 | $ 175.3 | $ 123.3
Gross margin (as a percent) | 60.60% | 52.60% | 61.20% | 53.90%
Operating income | $ 40.5 | $ 24.2 | $ 132.4 | $ 85.0
Operating margin (as a percent) | 43.90% | 35.00% | 46.20% | 37.20%
Product revenue |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 266.6 | $ 223.8 | $ 776.6 | $ 770.5
Product revenue | Other Items |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 0.0 | 0.0 | 0.0 | 0.0
Product revenue | Network and Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 174.4 | 154.6 | 490.6 | 542.1
Product revenue | Network and Service Enablement | Network Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 166.5 | 146.0 | 462.1 | 507.2
Product revenue | Network and Service Enablement | Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 7.9 | 8.6 | 28.5 | 34.9
Product revenue | Optical Security and Performance Products | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 92.2 | 69.2 | 286.0 | 228.4
Service revenue |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 36.8 | 32.4 | 111.4 | 99.2
Service revenue | Other Items |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 0.0 | 0.0 | 0.0 | 0.0
Service revenue | Network and Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 36.8 | 32.4 | 110.8 | 98.9
Service revenue | Network and Service Enablement | Network Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 24.4 | 17.9 | 71.8 | 58.6
Service revenue | Network and Service Enablement | Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | 12.4 | 14.5 | 39.0 | 40.3
Service revenue | Optical Security and Performance Products | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Total net revenue | $ 0.0 | $ 0.0 | $ 0.6 | $ 0.3

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