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CONTINGENCIES - Narrative (Details)
6 Months Ended 12 Months Ended
Jul. 24, 2019
USD ($)
Installment
Jan. 27, 2014
USD ($)
defendant
Nov. 28, 2021
USD ($)
suit
site
period
May 31, 2020
USD ($)
Sep. 04, 2018
USD ($)
Guarantee Obligations [Line Items]          
Threshold amount for environmental matters     $ 1,000,000.0    
Proposed penalty for violation of air quality standards       $ 2,200,000  
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     $ 54,500,000    
Beatrice | Other accrued liabilities          
Guarantee Obligations [Line Items]          
Accrual for environmental matters     2,400,000    
Beatrice | Other noncurrent liabilities          
Guarantee Obligations [Line Items]          
Accrual for environmental matters     52,100,000    
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)     $ 12,600,000    
Remaining lease terms     5 years    
Illinois          
Guarantee Obligations [Line Items]          
Remaining defendants in active suits | suit     1    
California | Negrete v. ConAgra Foods Case          
Guarantee Obligations [Line Items]          
Settlement require to pay     $ 9,000,000.0    
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     11,200,000    
California | Beatrice | Minimum | Other noncurrent liabilities          
Guarantee Obligations [Line Items]          
Amount accrued     $ 40,700,000