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Long-term Debt - Interest Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 27, 2021
Jun. 28, 2020
Jun. 30, 2019
Debt Instrument [Line Items]      
Amortization of discount and issuance costs, net of capitalized interest $ 32.8 $ 26.2 $ 18.3
Convertible Notes      
Debt Instrument [Line Items]      
Interest expense, net of capitalized interest 10.4 6.8 4.3
Amortization of discount and issuance costs, net of capitalized interest 32.8 26.2 18.3
Total interest expense, net $ 43.2 $ 33.0 $ 22.6