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Note 10 - Contingencies (Details Textual) $ in Millions | 9 Months Ended | 44 Months Ended
--- | --- | ---
Feb. 26, 2023 USD ($) | Feb. 26, 2023 USD ($)
Threshold Amount For Environmental Matters | $ 1.0 |
Lamb Weston Holdings Inc [Member] |  |
Lessee, Operating Lease, Renewal Term (Year) | 5 years | 5 years
Beatrice [Member] |  |
Accrual for Environmental Loss Contingencies, Ending Balance | $ 38.7 | $ 38.7
Beatrice [Member] | Other Accrued Liabilities [Member] |  |
Accrual for Environmental Loss Contingencies, Ending Balance | 2.0 | 2.0
Beatrice [Member] | Other Noncurrent Liabilities [Member] |  |
Accrual for Environmental Loss Contingencies, Ending Balance | 36.7 | 36.7
MPCA [Member] |  |
Accrued Environmental Loss Contingencies, Proposed Penalty Amount | 6.8 |
Performance And Payment Guarantee [Member] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | 75.0 | 75.0
Property Lease Guarantee [Member] |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 9.3 | $ 9.3
Lease Remaining Lease Terms (Year) | 4 years |
CALIFORNIA | Beatrice [Member] |  |
Litigation Settlement, Amount Awarded to Other Party | $ 101.7 |
Loss Contingency Settlement Agreement Terms Number Of Installments | 7 | 7
Loss Contingency Accrual, Payments |  | $ 61.0
CALIFORNIA | Beatrice [Member] | Other Accrued Liabilities [Member] |  |
Loss Contingency Accrual, Ending Balance | $ 11.6 | 11.6
CALIFORNIA | Beatrice [Member] | Other Noncurrent Liabilities [Member] |  |
Loss Contingency Accrual, Ending Balance | 29.0 | $ 29.0
CALIFORNIA | Beatrice [Member] | Maximum [Member] |  |
Litigation Settlement Amount Of Guarantee | $ 15.0 |

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