Long-Term Debt - Components of Long-Term Debt (Details) - USD ($) $ in Millions	Feb. 25, 2023	Aug. 27, 2022
Debt Instrument [Line Items]
Long-term debt, gross	$ 600.0	$ 600.0
Convertible Notes unamortized interest discount	0.0	(45.3)
Debt issuance costs, net	(9.0)	(8.8)
Long-term debt, net	591.0	545.9
ABL Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	0.0	0.0
Senior Secured Notes
Debt Instrument [Line Items]
Long-term debt, gross	300.0	300.0
Convertible Notes
Debt Instrument [Line Items]
Long-term debt, gross	$ 300.0	$ 300.0