Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	May 26, 2019	May 27, 2018
Income Tax Disclosure [Line Items]
Tax Cuts and Jobs Act of 2017, remeasurement of deferred tax liabilities	$ 79.3
Prepaid income taxes	41.6	$ 15.9
Gross unrecognized tax benefits	27.0	$ 17.4
Tax position, change is reasonably possible in the next twelve month	11.6
Unrecognized tax benefits, accrued interest	1.8
State loss carryforwards	15.4
Foreign loss carryforwards	11.1
Expiring Between 2019 and 2039
Income Tax Disclosure [Line Items]
State loss carryforwards	39.9
Deferred tax assets, federal tax credit carryforwards	16.5
State
Income Tax Disclosure [Line Items]
Prepaid income taxes	2.8
Accrued income taxes	5.6
Federal
Income Tax Disclosure [Line Items]
Prepaid income taxes	38.8
Accrued income taxes	$ 6.0