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Goodwill - Changes in goodwill (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jul. 02, 2016
Changes in goodwill |  |  |
Balance at the beginning of the period | $ 151.6 | $ 152.1 |
Acquisitions | 190.1 |  |
Currency translation and other adjustments | (5.4) | (0.5) |
Balance at the end of the period | 336.3 | 151.6 |
Goodwill balance | 995.3 | 810.6 |
Accumulated impairment losses | 659.0 | 659.0 |
Network Enablement |  |  |
Changes in goodwill |  |  |
Balance at the beginning of the period | 143.3 | 143.8 |
Acquisitions | 190.1 |  |
Currency translation and other adjustments | (5.4) | (0.5) |
Balance at the end of the period | 328.0 | 143.3 |
Goodwill balance | 629.9 | 445.2 | $ 445.7
Accumulated impairment losses | 301.9 | 301.9 | 301.9
Service Enablement |  |  |
Changes in goodwill |  |  |
Balance at the beginning of the period | 0.0 | 0.0 |
Acquisitions | 0.0 |  |
Currency translation and other adjustments | 0.0 | 0.0 |
Balance at the end of the period | 0.0 | 0.0 |
Goodwill balance | 272.6 | 272.6 | 272.6
Accumulated impairment losses | 272.6 | 272.6 | 272.6
Optical Security and Performance Products |  |  |
Changes in goodwill |  |  |
Balance at the beginning of the period | 8.3 | 8.3 |
Acquisitions | 0.0 |  |
Balance at the end of the period | 8.3 | 8.3 |
Goodwill balance | 92.8 | 92.8 | 92.8
Accumulated impairment losses | $ 84.5 | $ 84.5 | $ 84.5

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