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Goodwill (Tables)
 12 Months Ended
Jul. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of changes in goodwill
The following table presents the changes in goodwill allocated to the Company’s reportable segments (in millions):
 
Network
Enablement
 
Service
Enablement
 
Optical Security
and Performance
Products
 
Total
Balance as of June 27, 2015 (1)
$
154.5

 
$
92.7

 
$
8.3

 
$
255.5

Goodwill allocation - WaveReady (3)
(6.0
)
 
—

 
—

 
$
(6.0
)
Currency translation and other adjustments
(4.7
)
 
(1.3
)
 
—

 
$
(6.0
)
Goodwill impairment charge
—

 
(91.4
)
 
—

 
(91.4
)
Balance as of July 2, 2016 (2)
$
143.8


$
—


$
8.3


$
152.1

Currency translation
(0.5
)
 
—

 
—

 
$
(0.5
)
Balance as of July 1, 2017 (4)
$
143.3

 
$
—

 
$
8.3

 
$
151.6

(1)
Gross goodwill balances for NE, SE and OSP were $456.4 million, $273.9 million and $92.8 million, respectively as of June 27, 2015. Accumulated impairment for NE, SE and OSP was $301.9 million, $181.2 million and $84.5 million, respectively as of June 27, 2015.
(2)
Gross goodwill balances for NE, SE and OSP were $445.7 million, $272.6 million and $92.8 million, respectively as of July 2, 2016. Accumulated impairment for NE, SE and OSP was $301.9 million, $272.6 million and $84.5 million, respectively as of July 2, 2016.
(3)
Amount represents a release of the relative fair value of goodwill in our NE reporting unit related to the WaveReady products line, which is now a part of Lumentum as of the Separation Date. Refer to “Note 3. Discontinued Operations” for more information about the Separation.
(4)
Gross goodwill balances for NE, SE and OSP were $445.2 million, $272.6 million and $92.8 million, respectively as of July 1, 2017. Accumulated impairment for NE, SE and OSP was $301.9 million, $272.6 million and $84.5 million, respectively as of July 1, 2017.
Schedule of gross goodwill and accumulated impairment balances
The following table presents gross goodwill and aggregate impairment balances for the fiscal years ended July 1, 2017, and July 2, 2016 (in millions):
 
years ended
 
July 1, 2017
 
July 2, 2016
Gross goodwill balance
$
810.6

 
$
811.1

Accumulated impairment losses
(659.0
)
 
(659.0
)
Net goodwill balance
$
151.6

 
$
152.1