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Basis of Presentation - Asset Retirement Obligation (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Balance at beginning of period $ 4.0 $ 3.6
Liabilities Incurred 0.3 0.3
Liabilities Settled (0.7) 0.0
Accretion Expense 0.1 0.1
Revisions to Estimates 0.0 0.0
Balance at end of period $ 3.7 $ 4.0