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Income Taxes - Components of Income Tax Expense from Continuing Operations (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 27, 2021
Jun. 28, 2020
Jun. 30, 2019
Current:      
Federal $ 0.1 $ (7.3) $ 1.4
Foreign 0.1 0.2 0.5
State 0.2 0.1 0.3
Total current 0.4 (7.0) 2.2
Deferred:      
Federal 0.7 1.8 (1.9)
Foreign 0.0 (2.8) (4.5)
State 0.0 0.0 (0.2)
Total deferred 0.7 (1.0) (6.6)
Income tax expense (benefit) $ 1.1 $ (8.0) $ (4.4)