v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Jul. 31, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Period End Date Jun. 30, 2026  
Current Fiscal Year End Date --12-31  
Document Transition Report false  
Entity File Number 1-33100  
Entity Registrant Name Owens Corning  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 43-2109021  
Entity Address, Address Line One One Owens Corning Parkway  
Entity Address, City or Town Toledo  
Entity Address, State or Province OH  
Entity Address, Postal Zip Code 43659  
City Area Code 419  
Local Phone Number 248-8000  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol OC  
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   79,048,683
Entity Central Index Key 0001370946  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Document Quarterly Report true