Quarterly report pursuant to Section 13 or 15(d)

Cover Page

v3.24.1.u1
Cover Page - shares
 3 Months Ended
Mar. 30, 2024
May 03, 2024
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 30, 2024  
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 Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   145,978,142
Current Fiscal Year End Date --12-30  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q1  
Amendment Flag false  
CIK 0001839839