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Note 15 - Business Segments and Related Information - Presentation of Derivative Gains (Losses) from Economic Hedges of Forecasted Cash Flows in Segment Results (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions | 3 Months Ended
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Aug. 28, 2022 | Aug. 29, 2021
Net derivative gains (losses) | $ 9.5 | $ 10.2
Operating Segments [Member] |  |
Net derivative gains (losses) | 9.0 | 5.0
Operating Segments [Member] | Grocery And Snacks [Member] |  |
Net derivative gains (losses) | 5.0 | 3.2
Operating Segments [Member] | Refrigerated And Frozen [Member] |  |
Net derivative gains (losses) | 3.3 | 4.7
Operating Segments [Member] | International [Member] |  |
Net derivative gains (losses) | 0.1 | (3.2)
Operating Segments [Member] | Foodservice [Member] |  |
Net derivative gains (losses) | 0.6 | 0.3
Segment Reconciling Items [Member] |  |
Net derivative gains (losses) | $ 0.5 | $ 5.2

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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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