Summary Of Significant Accounting Policies (Costs And Accumulated Amortization Of Acquired Definite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	May 27, 2018	May 28, 2017
Accounting Policies [Abstract]
Definite-lived intangible assets	$ 83.0	$ 43.4
Accumulated amortization	(25.7)	(23.3)
Definite-lived intangible assets, net of accumulated amortization	57.3	20.1
Definite-lived intangible liabilities	(33.5)	(31.6)
Accumulated amortization	11.3	8.8
Definite-lived intangible liabilities, net of accumulated amortization	$ (22.2)	$ (22.8)