v3.25.4
Document and Entity Information - USD ($)
 12 Months Ended
Jan. 03, 2026
Feb. 26, 2026
Jun. 27, 2025
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jan. 03, 2026    
Document Transition Report false    
Entity File Number 001-32316    
Entity Registrant Name B&G FOODS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 13-3918742    
Entity Address, Address Line One 8 Sylvan Way    
Entity Address, City or Town Parsippany    
Entity Address, State or Province NJ    
Entity Address, Postal Zip Code 07054    
City Area Code 973    
Local Phone Number 401-6500    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol BGS    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category 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     $ 337,917,765
Entity Common Stock, Shares Outstanding   79,971,360  
Documents Incorporated by Reference [Text Block] Selected designated portions of the registrant’s definitive proxy statement to be filed on or before May 4, 2026 in connection with the registrant’s 2026 annual meeting of stockholders are incorporated by reference into Part III of this annual report    
Entity Central Index Key 0001278027    
Current Fiscal Year End Date --01-03    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY    
Amendment Flag false    
Auditor Name KPMG LLP    
Auditor Firm ID 185    
Auditor Location Short Hills, New Jersey