Derivative Instruments and Hedging Activities (Effects Of Derivatives Not Designated As Hedging Instruments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 26, 2017	Feb. 28, 2016	Feb. 26, 2017	Feb. 28, 2016
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Earnings	$ 1.2	$ 5.1	$ 5.6	$ 8.3
Equity forwards | Restaurant labor expenses
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Earnings	0.5	1.7	2.0	2.7
Equity forwards | General and administrative expenses
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Earnings	$ 0.7	$ 3.4	$ 3.6	$ 5.6