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Goodwill - Changes in Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jun. 29, 2019 | Jun. 30, 2018 | Jul. 01, 2017
Changes in goodwill |  |  |
Balance at the beginning of the period | $ 336.3 | $ 151.6 |
Acquisitions | 46.1 | 190.1 |
Other | 3.7 |  |
Currency translation and other adjustments | (5.0) | (5.4) |
Balance at the end of the period | 381.1 | 336.3 |
Goodwill balance | 1,040.1 | 995.3 |
Accumulated impairment losses | 659.0 | 659.0 |
Network Enablement |  |  |
Changes in goodwill |  |  |
Balance at the beginning of the period | 328.0 | 143.3 |
Acquisitions | 12.2 | 190.1 |
Other | 3.7 |  |
Currency translation and other adjustments | (5.0) | (5.4) |
Balance at the end of the period | 338.9 | 328.0 |
Goodwill balance | 640.8 | 629.9 | $ 445.2
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 | 0.0 |
Other | 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 | 33.9 | 0.0 |
Balance at the end of the period | 42.2 | 8.3 |
Goodwill balance | 126.7 | 92.8 | 92.8
Accumulated impairment losses | $ 84.5 | $ 84.5 | $ 84.5

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