CONTINGENCIES (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Nov. 23, 2025	Nov. 23, 2025	May 25, 2025	May 31, 2020
CONTINGENCIES
Insurance Settlements Receivable	$ 6.3	$ 6.3	$ 81.8
Threshold amount for Environmental Matters		1.0
Threatened Litigation
CONTINGENCIES
Loss contingency accrual	92.3	92.3	204.5
Settled Litigation
CONTINGENCIES
Payments for Legal Settlements	16.7
Litigation settlement amount				$ 101.7
Accounts Receivable
CONTINGENCIES
Insurance Settlements Receivable			78.4
Noncurrent Assets
CONTINGENCIES
Insurance Settlements Receivable			3.4
Other accrued liabilities | Threatened Litigation
CONTINGENCIES
Loss contingency accrual			160.2
Other noncurrent liabilities | Threatened Litigation
CONTINGENCIES
Loss contingency accrual			44.3
Beatrice
CONTINGENCIES
Accrual for environmental loss contingencies	35.2	35.2	36.0
Beatrice | Other accrued liabilities
CONTINGENCIES
Accrual for environmental loss contingencies	$ 3.2	$ 3.2	$ 3.2
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other Accrued Liabilities, Current	Other Accrued Liabilities, Current	Other Accrued Liabilities, Current
Beatrice | Other noncurrent liabilities
CONTINGENCIES
Accrual for environmental loss contingencies	$ 32.0	$ 32.0	$ 32.8
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other Accrued Liabilities, Current, Other Liabilities, Noncurrent	Other Accrued Liabilities, Current, Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Reese V Conagra Brands Inc
CONTINGENCIES
Loss contingency accrual payments		$ 96.7	$ 25.0
Reese V Conagra Brands Inc | Scenario, Plan [Member]
CONTINGENCIES
Litigation settlement additional amount payable	$ 88.7	$ 88.7