v3.26.1
Document And Entity Information - USD ($)
 12 Months Ended
May 31, 2026
Jun. 28, 2026
Nov. 21, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date May 31, 2026    
Document Transition Report false    
Securities Act File Number 1-7275    
Entity Registrant Name CONAGRA BRANDS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 47-0248710    
Entity Address, Address Line One 222 W. Merchandise Mart Plaza, Suite 1300    
Entity Address, City or Town Chicago    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60654    
City Area Code 312    
Local Phone Number 549-5000    
Title of 12(b) Security Common Stock, $5.00 par value    
Trading Symbol CAG    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 8,500,625,571
Entity Common Stock, Shares Outstanding   478,565,642  
Documents Incorporated by Reference [Text Block]

Portions of the Registrant’s definitive Proxy Statement for the Registrant’s 2026 Annual Meeting of Stockholders (the “2026 Proxy Statement”) are incorporated by reference into Part III.

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Auditor Name KPMG LLP    
Auditor Location Chicago, Illinois    
Auditor Firm ID 185    
Entity Central Index Key 0000023217    
Current Fiscal Year End Date --05-31    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY    
Amendment Flag false