v3.26.1
DISCONTINUED OPERATIONS - Net Earnings (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
NET EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS ATTRIBUTABLE TO OWENS CORNING, NET OF TAX $ (143) $ (348)
Discontinued Operations, Disposed of by Sale    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Disposal Group, Including Discontinued Operation, Revenue 312 270
Disposal Group, Including Discontinued Operation, Costs of Goods Sold 248 204
Disposal Group, Including Discontinued Operation, General and Administrative Expense 20 17
Disposal Group, Including Discontinued Operation, Loss from classification as held for sale 182 362
Disposal Group, Including Discontinued Operation, Other Expense (Income), Net 6 2
Total operating expenses 208 381
Disposal Group, Including Discontinued Operation, Interest Expense 0 1
Disposal Group, Including Discontinued Operation, Income Tax Expense (Benefit) (1) 32
NET EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS ATTRIBUTABLE TO OWENS CORNING, NET OF TAX $ (143) $ (348)