Basis of Presentation (Details) $ in Millions	Feb. 28, 2021 USD ($) restaurant	Jun. 01, 2020 USD ($)	May 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Retained earnings | $	$ (303.0)		$ (143.5)
Cumulative Effect, Period of Adoption, Adjustment
Summary Of Significant Accounting Policies [Line Items]
Retained earnings | $		$ 7.5
Retained earnings, net of tax | $		$ 2.5
Entity Operated Units
Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant	3
Franchised Units
Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant	31
Franchised Units | Latin America
Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant	24