Discontinued Operations and Assets Held for Sale (Income Statement Disclosure) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Feb. 26, 2017	Feb. 28, 2016	Feb. 26, 2017	Feb. 28, 2016
Discontinued Operations and Disposal Groups [Abstract]
Restaurant and marketing expenses		$ 0.3	$ 1.0	$ 0.2	$ 1.3
Other income and expenses	[1]	1.3	1.7	3.8	(20.3)
Earnings (loss) before income taxes		(1.6)	(2.7)	(4.0)	19.0
Income tax expense (benefit)		(0.9)	(0.3)	(2.2)	2.9
Earnings (loss) from discontinued operations, net of tax		$ (0.7)	$ (2.4)	$ (1.8)	$ 16.1

[1] Amounts for the nine months ended February 28, 2016 include gains recognized upon satisfaction of landlord consents.