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Debt - Interest Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Debt Disclosure [Abstract]    
Interest expense-contractual interest $ 2.1 $ 2.5
Amortization of debt issuance cost 0.3 0.4
Accretion of debt discount $ 5.1 $ 6.5