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Basis of Presentation (Tables)
 12 Months Ended
Jul. 01, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of asset retirement obligation
The activities and balances for ARO are as follows (in millions):
 
Balance at Beginning of Period
 
Liabilities Incurred
 
Liabilities Settled
 
Accretion Expense
 
Revisions to Estimates
 
Balance at End of Period
Year ended July 1, 2017
$
3.7

 
0.1

 
(0.1
)
 
0.2

 
(0.3
)
 
$
3.6

Year ended July 2, 2016
$
4.4

 
0.4

 
(0.9
)
 
0.2

 
(0.4
)
 
$
3.7