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CONTINGENCIES - Narrative (Details) |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jan. 27, 2014 USD ($) defendant | Nov. 24, 2019 USD ($) | Feb. 28, 2021 USD ($) suit Installment site period | Sep. 04, 2018 USD ($)
Guarantee Obligations [Line Items] |  |  |  |
Threshold amount for environmental matters |  |  | $ 1,000,000 |
Lamb Weston |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Number of optional extension periods | period |  |  | 1 |
Period of optional extensions |  |  | 5 years |
Beatrice |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Number of sites under environmental matters for which acquired company has a liability | site |  |  | 40 |
Accrual for environmental matters |  |  | $ 55,800,000 |
Increase in environmental reserves |  | $ 6,600,000 |  |
Beatrice | Other accrued liabilities |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Accrual for environmental matters |  |  | 2,000,000.0 |
Beatrice | Other noncurrent liabilities |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Accrual for environmental matters |  |  | 53,800,000 |
Performance and payment guarantee for Lamb Weston |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Guarantee under sublease agreement (maximum) |  |  | 75,000,000.0 |
Performance and payment of all amounts under sublease agreement |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Guarantee under sublease agreement (maximum) |  |  | $ 14,500,000 |
Remaining lease terms |  |  | 6 years |
Illinois |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Remaining defendants in active suits | suit |  |  | 1 |
California | Beatrice |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Number of other defendants | defendant | 2 |  |  |
Estimate of possible loss | $ 1,150,000,000 |  |  | $ 409,000,000.0
Total payments to be made under settlement |  |  | $ 101,700,000,000 |
Number of annual installments to be made | Installment |  |  | 7 |
California | Beatrice | Maximum |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Litigation settlement, amount of guarantee provided |  |  | $ 15,000,000.0 |
California | Beatrice | Minimum | Other accrued liabilities |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Amount accrued |  |  | 11,300,000 |
California | Beatrice | Minimum | Other noncurrent liabilities |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |
Amount accrued |  |  | $ 52,100,000 |

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