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Commitments and Contingencies (Tables)
 3 Months Ended
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of changes in the entity's warranty reserve
The following table presents the changes in the Company’s warranty reserve during fiscal 2018 and fiscal 2017 (in millions):
 
Three Months Ended
 
September 30, 2017
 
October 1, 2016
Balance as of beginning of period
$
5.8

 
$
4.9

Provision for warranty
0.5

 
1.6

Utilization of reserve
(0.9
)
 
(1.1
)
Adjustments related to pre-existing warranties (including changes in estimates)
0.7

 
(0.2
)
Acquisition of Trilithic (1)
0.3

 
—

Balance as of end of period
$
6.4


$
5.2


(1) See “Note 5. Mergers and Acquisitions” of the Notes to Consolidated Financial Statements for detail of acquisition.