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Note 7 - Goodwill and Other Identifiable Intangible Assets (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
May 28, 2023 | Aug. 28, 2022 | May 28, 2023 | May 29, 2022 | May 30, 2021
Fair Value Measurement, Inputs, Terminal Growth Rate |  | 1.00% | 1.00% |  |
Goodwill, Impairment Loss |  |  | $ 141.7 |  |
Amortization of Intangible Assets |  |  | 56.8 | $ 59.3 | $ 59.7
Trade Names [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) |  |  | 589.2 |  |
Refrigerated And Frozen [Member] |  |  |  |  |
Goodwill, Impairment Loss |  |  | 141.7 |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) |  |  | 496.6 | 103.9 | 76.9
Grocery Snacks and Refrigerated Frozen [Member] | Trademarks and Trade Names [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) | $ 345.2 |  |  | $ 209.0 | $ 90.9
Grocery Snacks and Refrigerated Frozen [Member] | Gardein Brand Name [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) |  |  | 91.5 |  |
Grocery Snacks and Refrigerated Frozen [Member] | Birds Eye Brand Name [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) |  |  | 78.3 |  |
Selling, General and Administrative Expenses [Member] | Refrigerated And Frozen [Member] |  |  |  |  |
Goodwill, Impairment Loss |  | $ 141.7 | $ 141.7 |  |
Selling, General and Administrative Expenses [Member] | Refrigerated And Frozen [Member] | Trade Names [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) |  | $ 244.0 |  |  |
Sides Components And Enhancers Reporting Unit [Member] |  |  |  |  |
Fair Value Measurement, Inputs, Discount Rate |  | 7.75% | 7.75% |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482686/350-30-45-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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