Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	May 27, 2018	May 28, 2017	May 29, 2016
Income Tax Disclosure [Line Items]
Tax Cuts and Jobs Act of 2017, blended income tax rate	29.40%	35.00%	35.00%
Tax Cuts and Jobs Act of 2017, remeasurement of deferred tax liabilities	$ 79.3
Prepaid income taxes	15.9	$ 6.2
Gross unrecognized tax benefits	17.4	$ 16.4
Tax position, change is reasonably possible in the next twelve month	2.0
Unrecognized tax benefits, accrued interest	1.1
State loss carryforwards	12.6
Foreign loss carryforwards	11.1
Expiring Between 2019 and 2039
Income Tax Disclosure [Line Items]
State loss carryforwards	42.6
Deferred tax assets, federal tax credit carryforwards	17.1
State
Income Tax Disclosure [Line Items]
Prepaid income taxes	2.6
Federal
Income Tax Disclosure [Line Items]
Prepaid income taxes	$ 13.3