Annual report pursuant to Section 13 and 15(d)

Cover Page

Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 30, 2023
Feb. 23, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 30, 2023    
Current Fiscal Year End Date --12-30    
Document Transition Report false    
Entity File Number 001-40456    
Entity Registrant Name JANUS INTERNATIONAL GROUP, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 86-1476200    
Entity Address, Address Line One 135 Janus International Blvd.    
Entity Address, City or Town Temple    
Entity Address, State or Province GA    
Entity Address, Postal Zip Code 30179    
City Area Code 866    
Local Phone Number 562-2580    
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol JBI    
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     $ 1,010.9
Entity Common Stock, Shares Outstanding   146,871,908  
Documents Incorporated by Reference
Portions of the Registrant’s Definitive Proxy Statement (the “Proxy Statement”) relating to its 2024 Annual Meeting of Stockholders are incorporated by reference into Part III, Items 10-14 of this Annual Report on Form 10-K where indicated, or such information will be included in an amendment to this Annual Report on Form 10-K in accordance with Instruction G(3) of Form 10-K. Except with respect to information specifically incorporated by reference herein, the Proxy Statement is not deemed to be filed as part hereof.
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Central Index Key 0001839839