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Basis of Presentation (Tables)
 12 Months Ended
Jun. 27, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Asset Retirement Obligations
 
Balance at Beginning of Period
 
Liabilities Incurred
 
Liabilities Settled
 
Accretion Expense
 
Revisions to Estimates
 
Balance at End of Period
Year ended June 27, 2020
$
3.6

 
$
0.3

 
$
—

 
$
0.1

 
$
—

 
$
4.0

Year ended June 29, 2019
$
3.7

 
$
0.4

 
$
(0.1
)
 
$
0.1

 
$
(0.5
)
 
$
3.6