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Commitments and Contingencies (Tables)
 6 Months Ended
Dec. 31, 2016
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 2017 and fiscal 2016 (in millions):
 
Three Months Ended
 
Six Months Ended
 
December 31, 2016
 
January 2, 2016
 
December 31, 2016
 
January 2, 2016
Balance as of beginning of period
$
5.2

 
$
4.0

 
$
4.9

 
$
3.7

Provision for warranty
1.6

 
0.8

 
3.2

 
1.7

Utilization of reserve
(0.9
)
 
(0.7
)
 
(2.0
)
 
(1.5
)
Adjustments related to pre-existing warranties (including changes in estimates)
(0.6
)
 
0.2

 
(0.8
)
 
0.4

Balance as of end of period
$
5.3


$
4.3

 
$
5.3

 
$
4.3