v3.26.1
GOODWILL AND OTHER INTANGIBLE ASSETS - ROLLFORWARD (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Gross Goodwill [Roll Forward]    
Goodwill, gross, beginning balance $ 3,796  
Divestiture (7)  
Foreign currency translation 28  
Goodwill, gross, ending balance 3,761  
Accumulated Impairment Loss [Roll Forward]    
Goodwill, Impaired, Accumulated Impairment Loss 2,117  
Foreign currency translation 14  
Goodwill, Impaired, Accumulated Impairment Loss 2,103  
Goodwill, net 1,658 $ 1,679
Roofing    
Gross Goodwill [Roll Forward]    
Goodwill, gross, beginning balance 661  
Divestiture 0  
Foreign currency translation 2  
Goodwill, gross, ending balance 659  
Accumulated Impairment Loss [Roll Forward]    
Goodwill, Impaired, Accumulated Impairment Loss 0  
Foreign currency translation 0  
Goodwill, Impaired, Accumulated Impairment Loss 0  
Goodwill, net 659  
Doors    
Gross Goodwill [Roll Forward]    
Goodwill, gross, beginning balance 1,515  
Divestiture (7)  
Foreign currency translation 6  
Goodwill, gross, ending balance 1,502  
Accumulated Impairment Loss [Roll Forward]    
Goodwill, Impaired, Accumulated Impairment Loss 1,135  
Foreign currency translation 0  
Goodwill, Impaired, Accumulated Impairment Loss 1,135  
Goodwill, net 367  
Insulation    
Gross Goodwill [Roll Forward]    
Goodwill, gross, beginning balance 1,620  
Divestiture 0  
Foreign currency translation 20  
Goodwill, gross, ending balance 1,600  
Accumulated Impairment Loss [Roll Forward]    
Goodwill, Impaired, Accumulated Impairment Loss 982  
Foreign currency translation 14  
Goodwill, Impaired, Accumulated Impairment Loss 968  
Goodwill, net $ 632