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Goodwill | 3 Months Ended
--- | ---
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Note 8. Goodwill The following table presents the changes in goodwill allocated to the Company’s reportable segments (in millions):
| Network Enablement |  | Optical Security and Performance Products |  | Total
Balance as of July 1, 2017 | $ | 143.3 |  |  | $ | 8.3 |  |  | $ | 151.6 |
Goodwill - Trilithic (1) | 16.9 |  |  | — |  |  | 16.9 |
Currency translation adjustments | 0.9 |  |  | — |  |  | 0.9 |
Balance as of September 30, 2017 | $ | 161.1 |  |  | $ | 8.3 |  |  | $ | 169.4 |
(1) See “Note 5. Mergers and Acquisitions” of the Notes to Consolidated Financial Statements for detail. The Company reviews goodwill for impairment during the fourth quarter of each fiscal year, or more frequently if events or circumstances indicate that an impairment loss may have occurred. In the fourth quarter of fiscal 2017, the Company completed the annual impairment test of goodwill with no goodwill impairments for the NE and OSP reporting units. There were no events or changes in circumstances which triggered an impairment review during the three months ended September 30, 2017.

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