Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 30, 2015	Aug. 24, 2014
Income Tax Disclosure [Abstract]
Effective income tax rate	27.50%	55.80%
Loss on extinguishment of debt	$ 0.0	$ 80.0
Losses on extinguishment of debt, net of taxes		$ 49.4
Effective income tax rate, excluding debt extinguishment costs and debt extinguishment tax benefit (as a percent)		17.00%
Tax position, change is reasonably possible in the next twelve months	$ 0.9