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Note 15 - Contingencies (Details Textual) $ in Thousands |  | 12 Months Ended
--- | --- | ---
May 28, 2023 USD ($) | May 28, 2023 USD ($) | May 29, 2022 USD ($) | May 30, 2021 USD ($)
Threshold Amount For Environmental Matters |  |  | $ 1,000 |
Accrued Environmental Loss Contingencies, Proposed Penalty Amount | $ 1,250 |  |  |
Lamb Weston Holdings Inc [Member] |  |  |  |
Lessee, Operating Lease, Renewal Term (Year) | 5 years | 5 years |  |
Negrete v. ConAgra Foods, In [Member] |  |  |  |
Litigation Settlement, Amount Awarded to Other Party |  | $ 3,000 |  |
Loss Contingency, Claims Settled, Number |  | 1 |  |
Beatrice [Member] |  |  |  |
Accrual for Environmental Loss Contingencies | $ 40,100 | $ 40,100 |  |
Beatrice [Member] | Other Accrued Liabilities [Member] |  |  |  |
Accrual for Environmental Loss Contingencies | 1,500 | 1,500 |  |
Beatrice [Member] | Other Noncurrent Liabilities [Member] |  |  |  |
Accrual for Environmental Loss Contingencies | 38,600 | 38,600 |  |
Performance And Payment Guarantee [Member] |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 75,000 | 75,000 |  |
Property Lease Guarantee [Member] |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 8,700 | $ 8,700 |  |
Lease Remaining Lease Terms (Year) |  | 4 years |  |
CANADA | Beatrice [Member] |  |  |  |
Litigation Settlement, Amount Awarded to Other Party |  |  |  | $ 101,700
Loss Contingency Settlement Agreement Terms Number Of Installments |  |  |  | 7
Loss Contingency Accrual, Payments |  | $ 61,000 |  |
CANADA | Beatrice [Member] | Other Accrued Liabilities [Member] |  |  |  |
Loss Contingency Accrual | 11,800 | 11,800 |  |
CANADA | Beatrice [Member] | Other Noncurrent Liabilities [Member] |  |  |  |
Loss Contingency Accrual | $ 28,900 | 28,900 |  |
CANADA | Beatrice [Member] | Maximum [Member] |  |  |  |
Litigation Settlement Amount Of Guarantee |  | $ 15,000 |  |

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