Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 28, 2016	Aug. 30, 2015
Supplemental Cash Flow Elements [Abstract]
Interest paid, net of amounts capitalized	$ 6.8	$ 6.2
Income taxes paid, net of refunds	(3.0)	29.3
Increase in land, buildings and equipment through accrued purchases	$ 14.9	$ 18.9