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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jun. 29, 2019
Reconciliation of unrecognized tax benefits      
Balance at the beginning of the period $ 52.0 $ 54.2 $ 48.6
Additions based on tax positions related to current year 14.8 2.2 1.7
Additions based on tax positions related to prior year   0.3 7.3
Reduction based on tax positions related to prior year (6.8) (3.8) (2.8)
Reduction related to settlement (0.5) (0.4)  
Reductions for lapse of statute of limitations (0.4) (0.5) (0.6)
Balance at the end of the period $ 59.1 $ 52.0 $ 54.2