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Commitments and Contingencies (Tables)
 6 Months Ended
Dec. 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
 
Six Months Ended
 
December 30, 2017
 
December 31, 2016
 
December 30, 2017
 
December 31, 2016
Balance as of beginning of period
$
6.4

 
$
5.2

 
$
5.8

 
$
4.9

Provision for warranty
1.7

 
1.6

 
2.2

 
3.2

Utilization of reserve
(2.6
)
 
(0.9
)
 
(3.5
)
 
(2.0
)
Adjustments related to pre-existing warranties (including changes in estimates)
1.3

 
(0.6
)
 
2.0

 
(0.8
)
Acquisition of Trilithic (1)
—

 
—

 
0.3

 
—

Balance as of end of period
$
6.8


$
5.3

 
$
6.8

 
$
5.3


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