Note 5 - Financing Arrangements (Details Textual) - USD ($) $ in Millions	Feb. 25, 2024	May 28, 2023
Supplier Finance Program, Payment Timing, Period (Year)	120 years
Supplier Finance Program, Obligation	$ 321.3	$ 355.1
Short-Term Debt	$ 166.3	636.3
Lessee, Finance Lease, Term of Contract (Year)	20 years
Lessee, Finance Lease, Discount Rate	5.42%
Property, Plant and Equipment [Member]
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	$ 165.3
Finance Lease, Liability	165.3
Supplier Financing Arrangment [Member]
Short-Term Debt	$ 50.3	$ 62.5