Summary Of Significant Accounting Policies (Costs And Accumulated Amortization Of Acquired Definite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	May 28, 2017	May 29, 2016
Accounting Policies [Abstract]
Definite-lived intangible assets	$ 43.4	$ 43.4
Accumulated amortization	(23.3)	(20.6)
Definite-lived intangible assets, net of accumulated amortization	20.1	22.8
Definite-lived intangible liabilities	(31.6)	(21.4)
Accumulated amortization	8.8	8.3
Definite-lived intangible liabilities, net of accumulated amortization	$ (22.8)	$ (13.1)