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Note 12 - Contingencies (Details Textual) $ in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Oct. 31, 2023 USD ($) | Nov. 26, 2023 USD ($) | May 28, 2023 USD ($)
Threshold Amount For Environmental Matters |  | $ 1.0 |
Lamb Weston Holdings Inc [Member] |  |  |
Lessee, Operating Lease, Renewal Term (Year) |  | 5 years |
Threatened Litigation [Member] |  |  |
Loss Contingency Accrual |  | $ 54.5 | $ 51.3
Reese v. Conagra Brands, Inc. [Member] | Damages from Product Defects [Member] | Judicial Ruling For Compensatory Damages [Member] |  |  |
Loss Contingency, Damages Awarded, Value | $ 3.1 |  |
Reese v. Conagra Brands, Inc. [Member] | Damages from Product Defects [Member] | Judicial Ruling For Punitive Damages [Member] |  |  |
Loss Contingency, Damages Awarded, Value | $ 4.0 |  |
Other Accrued Liabilities [Member] | Threatened Litigation [Member] |  |  |
Loss Contingency Accrual |  | 26.1 | 22.4
Other Noncurrent Liabilities [Member] | Threatened Litigation [Member] |  |  |
Loss Contingency Accrual |  | 28.4 | 28.9
Beatrice [Member] |  |  |
Accrual for Environmental Loss Contingencies |  | 38.8 | 40.1
Beatrice [Member] | Other Accrued Liabilities [Member] |  |  |
Accrual for Environmental Loss Contingencies |  | 1.5 | 1.5
Beatrice [Member] | Other Noncurrent Liabilities [Member] |  |  |
Accrual for Environmental Loss Contingencies |  | 37.3 | 38.6
Performance And Payment Guarantee [Member] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted |  | 75.0 |
Property Lease Guarantee [Member] |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted |  | $ 7.4 |
Lease Remaining Lease Terms (Year) |  | 3 years |
CALIFORNIA | Beatrice [Member] |  |  |
Litigation Settlement, Amount Awarded to Other Party |  | $ 101.7 |
Loss Contingency Settlement Agreement Terms Number Of Installments |  | 7 |
Loss Contingency Accrual, Payments |  | $ 73.0 |
Loss Contingency Accrual |  | 28.8 | 40.7
CALIFORNIA | Beatrice [Member] | Other Accrued Liabilities [Member] |  |  |
Loss Contingency Accrual |  | 11.6 | 11.8
CALIFORNIA | Beatrice [Member] | Other Noncurrent Liabilities [Member] |  |  |
Loss Contingency Accrual |  | 17.2 | $ 28.9
CALIFORNIA | Beatrice [Member] | Maximum [Member] |  |  |
Litigation Settlement Amount Of Guarantee |  | $ 15.0 |

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