Basis of Presentation (Details) $ in Millions	Nov. 25, 2018 USD ($) restaurant	May 28, 2018 USD ($)	May 27, 2018 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Current deferred revenue	$ 388.6		$ 415.8
Deferred franchise fees - non-current	$ 2.8
Accounting Standards Update 2014-09
Summary Of Significant Accounting Policies [Line Items]
Current deferred revenue		$ 1.2
Deferred franchise fees - non-current		2.1
Accounting Standards Update 2014-09 | Retained Earnings
Summary Of Significant Accounting Policies [Line Items]
Cumulative decrease effect of new accounting principle		3.3
Accounting Standards Update 2016-16 | Retained Earnings
Summary Of Significant Accounting Policies [Line Items]
Cumulative decrease effect of new accounting principle		$ 6.3
Latin America and the Middle East
Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant	34
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	37