Income Taxes (Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	May 26, 2019	May 27, 2018	May 28, 2017
Income Tax Disclosure [Abstract]
U.S. statutory rate	21.00%	29.40%	35.00%
State and local income taxes, net of federal tax benefits	2.40%	1.80%	1.70%
Enactment of the Tax Act	0	(0.131)	0
Benefit of federal income tax credits	(10.80%)	(12.80%)	(9.20%)
Other, net	(4.50%)	(5.00%)	(3.20%)
Effective income tax rate	8.10%	0.30%	24.30%