v3.26.1
Cover - shares
3 Months Ended
Mar. 29, 2026
May 04, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 29, 2026  
Document Transition Report false  
Entity File Number 001-41545  
Entity Registrant Name MasterBrand, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 88-3479920  
Entity Address, Address Line One 3300 Enterprise Parkway, Suite 300  
Entity Address, City or Town Beachwood  
Entity Address, State or Province OH  
Entity Address, Postal Zip Code 44122  
City Area Code 877  
Local Phone Number 622-4782  
Title of 12(g) Security Common Stock, par value $0.01 per share  
Trading Symbol MBC  
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   127,984,590
Entity Central Index Key 0001941365  
Amendment Flag false  
Current Fiscal Year End Date --12-29  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1