v3.26.1
RESTRUCTURING, ACQUISITION AND DIVESTITURE-RELATED COSTS (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended
Sep. 30, 2025
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2023
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   $ 46 $ 3      
Restructuring Reserve Roll Forward            
Restructuring Costs   46 3      
Acquisition-Related Restructuring            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   13 4      
Restructuring Reserve Roll Forward            
Beginning Balance   11 3      
Restructuring Costs   13 4      
Payments   (7) (4)      
Accelerated depreciation and other non-cash items   (12) 0      
Ending Balance   5 3      
Cumulative charges incurred   122 59      
Acquisition-related Restructuring            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   0 0      
Restructuring Reserve Roll Forward            
Beginning Balance   10 14      
Restructuring Costs   0 0      
Payments   (4) (1)      
Accelerated depreciation and other non-cash items   0 0      
Ending Balance   6 13      
Cumulative charges incurred   40 33      
European Operating Structure Optimization            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   0 (1)      
Expected cost           $ 20
Severance Costs   1        
Restructuring Reserve Roll Forward            
Beginning Balance   0 5      
Restructuring Costs   0 (1)      
Payments   0 (1)      
Accelerated depreciation and other non-cash items   0 (1)      
Ending Balance   0 2      
Cumulative charges incurred   12 14      
Building Materials Business Exit            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   0 0      
Restructuring Reserve Roll Forward            
Beginning Balance   0 6      
Restructuring Costs   0 0      
Payments   0 0      
Accelerated depreciation and other non-cash items   0 0      
Ending Balance   0 6      
Cumulative charges incurred   4 6      
Roofing Integration Restructuring            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   1        
Restructuring Reserve Roll Forward            
Beginning Balance   1        
Restructuring Costs   1        
Payments   (1)        
Accelerated depreciation and other non-cash items   (1)        
Ending Balance   0        
Cumulative charges incurred   9        
Global Corporate Restructuring            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   32        
Restructuring Reserve Roll Forward            
Beginning Balance   0        
Restructuring Costs   32        
Payments   (2)        
Accelerated depreciation and other non-cash items   0        
Ending Balance   30        
Cumulative charges incurred   32        
Severance            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges   (32) (2)      
Restructuring Reserve Roll Forward            
Ending Balance   41        
Severance | Global Corporate Restructuring            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs   32        
Restructuring Reserve Roll Forward            
Restructuring Costs   32        
Employee Severance And Other Exit Costs | Acquisition-related Restructuring | Minimum            
Restructuring Cost and Reserve [Line Items]            
Expected cost   20        
Employee Severance And Other Exit Costs | Acquisition-related Restructuring | Maximum            
Restructuring Cost and Reserve [Line Items]            
Expected cost   30        
Employee Severance And Other Exit Costs | Building Materials Business Exit            
Restructuring Cost and Reserve [Line Items]            
Expected cost   15        
Employee Severance And Other Exit Costs | Acquisition-Related Restructuring, Prineville            
Restructuring Cost and Reserve [Line Items]            
Expected cost         $ 12  
Employee Severance And Other Exit Costs | Acquisition-Related Restructuring, Greenville            
Restructuring Cost and Reserve [Line Items]            
Expected cost $ 7          
Employee Severance And Other Exit Costs | Acquisition-Related Restructuring, Aldergrove            
Restructuring Cost and Reserve [Line Items]            
Expected cost       $ 22    
Employee Severance And Other Exit Costs | Acquisition-Related Restructuring, Mesquite            
Restructuring Cost and Reserve [Line Items]            
Expected cost       2    
Employee Severance And Other Exit Costs | Global Corporate Restructuring            
Restructuring Cost and Reserve [Line Items]            
Expected cost   58        
Accelerated depreciation            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges   (3) 0      
Accelerated depreciation | Acquisition-related Restructuring | Minimum            
Restructuring Cost and Reserve [Line Items]            
Expected cost   15        
Accelerated depreciation | Acquisition-related Restructuring | Maximum            
Restructuring Cost and Reserve [Line Items]            
Expected cost   20        
Accelerated depreciation | Acquisition-Related Restructuring, Greenville            
Restructuring Cost and Reserve [Line Items]            
Expected cost 10          
Accelerated depreciation | Acquisition-Related Restructuring, Aldergrove            
Restructuring Cost and Reserve [Line Items]            
Expected cost       7    
Accelerated depreciation | Acquisition-Related Restructuring, Mesquite            
Restructuring Cost and Reserve [Line Items]            
Expected cost       $ 7    
Additional Exit Costs | Cost of sales            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges   (5) 0      
Additional Exit Costs | Other Expense [Member]            
Restructuring Cost and Reserve [Line Items]            
Restructuring Charges   $ (6) $ (1)      
Accelerated Depreciation, Asset Write-Offs, And Other Exit Costs | Roofing Integration Restructuring            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs 22          
Restructuring Reserve Roll Forward            
Restructuring Costs $ 22          
Accelerated Depreciation And Inventory Write-Offs | Acquisition-Related Restructuring, Prineville            
Restructuring Cost and Reserve [Line Items]            
Expected cost         $ 30