Long-term Debt - Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Dec. 26, 2021	Dec. 27, 2020	Dec. 26, 2021	Dec. 27, 2020
Debt Instrument [Line Items]
Amortization of debt issuance costs and discount, net of non-cash capitalized interest			$ 9.0	$ 18.1
Convertible Notes
Debt Instrument [Line Items]
Interest expense, net of capitalized interest	$ 0.8	$ 2.8	1.9	6.0
Amortization of debt issuance costs and discount, net of non-cash capitalized interest	3.9	8.7	9.0	18.1
Total interest expense, net	$ 4.7	$ 11.5	$ 10.9	$ 24.1

Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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