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Goodwill (Tables)
 6 Months Ended
Dec. 31, 2016
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 
 
Optical Security
and Performance
Products
 
Total
Balance as of July 2, 2016
$
143.8

 
$
8.3

 
$
152.1

Currency translation adjustments
(2.4
)
 
—

 
(2.4
)
Balance as of December 31, 2016
$
141.4

 
$
8.3

 
$
149.7