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Operating Segments and Geographic Information - Information on Reportable Segments (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) | Jan. 02, 2016 USD ($) | Dec. 31, 2016 USD ($) subsegment segment | Jan. 02, 2016 USD ($)
Information on reportable segments |  |  |  |
Number of broad business categories (in segment) | segment |  |  | 2 |
Net revenue | $ 206.5 | $ 232.1 | $ 417.3 | $ 461.8
Gross profit | $ 124.7 | $ 141.8 | $ 249.8 | $ 282.3
Gross margin (as a percent) | 60.40% | 61.10% | 59.90% | 61.10%
Operating income | $ 6.7 | $ 9.2 | $ 16.8 | $ 6.3
Operating margin (as a percent) | 3.20% | 4.00% | 4.00% | 1.40%
Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Net revenue | $ 206.5 | $ 232.1 | $ 417.3 | $ 461.8
Gross profit | $ 129.9 | $ 147.9 | $ 260.2 | $ 294.0
Gross margin (as a percent) | 62.90% | 63.70% | 62.40% | 63.70%
Operating income | $ 26.9 | $ 30.5 | $ 54.4 | $ 59.2
Operating margin (as a percent) | 13.00% | 13.10% | 13.00% | 12.80%
Reconciling Items |  |  |  |
Information on reportable segments |  |  |  |
Net revenue | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0
Gross profit | (5.2) | (6.1) | (10.4) | (11.7)
Operating income | (20.2) | (21.3) | $ (37.6) | (52.9)
Network and Service Enablement |  |  |  |
Information on reportable segments |  |  |  |
Number of subsegment (in subsegment) | subsegment |  |  | 2 |
Network and Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Net revenue | 157.6 | 173.3 | $ 312.6 | 338.8
Gross profit | $ 101.7 | $ 115.1 | $ 200.4 | $ 224.2
Gross margin (as a percent) | 64.50% | 66.40% | 64.10% | 66.20%
Operating income | $ 6.0 | $ 8.0 | $ 10.1 | $ 10.4
Operating margin (as a percent) | 3.80% | 4.60% | 3.20% | 3.10%
Network and Service Enablement | Network Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Net revenue | $ 117.0 | $ 136.4 | $ 235.6 | $ 254.0
Gross profit | $ 74.6 | $ 90.6 | $ 152.0 | $ 166.3
Gross margin (as a percent) | 63.80% | 66.40% | 64.50% | 65.50%
Network and Service Enablement | Service Enablement | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Net revenue | $ 40.6 | $ 36.9 | $ 77.0 | $ 84.8
Gross profit | $ 27.1 | $ 24.5 | $ 48.4 | $ 57.9
Gross margin (as a percent) | 66.70% | 66.40% | 62.90% | 68.30%
Optical Security and Performance Products | Segment Measures |  |  |  |
Information on reportable segments |  |  |  |
Net revenue | $ 48.9 | $ 58.8 | $ 104.7 | $ 123.0
Gross profit | $ 28.2 | $ 32.8 | $ 59.8 | $ 69.8
Gross margin (as a percent) | 57.70% | 55.80% | 57.10% | 56.70%
Operating income | $ 20.9 | $ 22.5 | $ 44.3 | $ 48.8
Operating margin (as a percent) | 42.70% | 38.30% | 42.30% | 39.70%

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