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Goodwill
 12 Months Ended
Jun. 27, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill
Note 9. Goodwill
Changes in the carry value of goodwill allocated segment are as follows (in millions):
 
Network
Enablement
 
Service
Enablement
 
Optical Security
and Performance
Products
 
Total
Balance as of June 30, 2018 (1)
$
328.0

 
$
—

 
$
8.3

 
$
336.3

Acquisitions (2)
12.2

 
—

 
33.9

 
46.1

Other
3.7

 
—

 
—

 
3.7

Currency translation and other adjustments
(5.0
)
 
—

 
—

 
(5.0
)
Balance as of June 29, 2019 (3)
$
338.9


$
—


$
42.2


$
381.1

Acquisitions (2)
—

 
4.3

 
—

 
4.3

Currency translation and other adjustments
(4.0
)
 
—

 
—

 
$
(4.0
)
Balance as of June 27, 2020 (4)
$
334.9

 
$
4.3

 
$
42.2

 
$
381.4

(1)
Gross goodwill balances for NE, SE and OSP were $629.9 million, $272.6 million and $92.8 million, respectively as of June 30, 2018. Accumulated impairment for NE, SE and OSP was $301.9 million, $272.6 million and $84.5 million, respectively as of June 30, 2018.
(2)
See “Note 5. Acquisitions” of the Notes to Consolidated Financial Statement for additional information related to the Company’s acquisitions.
(3)
Gross goodwill balances for NE, SE and OSP were $640.8 million, $272.6 million and $126.7 million, respectively as of June 29, 2019. Accumulated impairment for NE, SE and OSP was $301.9 million, $272.6 million and $84.5 million, respectively as of June 29, 2019.
(4)
Gross goodwill balances for NE, SE and OSP were $636.8 million, $276.9 million and $126.7 million, respectively as of June 27, 2020. Accumulated impairment for NE, SE and OSP was $301.9 million, $272.6 million and $84.5 million, respectively as of June 27, 2020.

Impairment of Goodwill
The Company tests goodwill at the reporting unit level for impairment annually, during the fourth quarter of each fiscal year, or more frequently if events or circumstances indicate that the asset may be impaired. The Company determined that, based on its organizational structure and the financial information that is provided to and reviewed by the Company’s Chief Operating Decision Maker (CODM) during fiscal 2020, 2019 and 2018 and its reporting units were NE, SE and OSP.
No indications of impairment were identified for fiscal years ending on June 27, 2020, June 29, 2019 and June 30, 2018.