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EARNINGS PER SHARE (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
USD ($)
$ / shares
shares
Mar. 31, 2023
USD ($)
Jun. 30, 2022
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
Jun. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2022
USD ($)
$ / shares
shares
Dec. 31, 2022
share_repurchase_program
shares
Earnings Per Share [Abstract]              
Net earnings attributable to Owens Corning | $ $ 345 $ 383 $ 343 $ 304 $ 728 $ 647  
Weighted-average number of shares outstanding used for basic earnings per share 90,500,000   97,600,000   90,900,000 98,600,000  
Non-vested restricted stock units and performance share units 800,000   800,000   800,000 700,000  
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings per share 91,300,000   98,400,000   91,700,000 99,300,000  
Basic (in dollars per share) | $ / shares $ 3.81   $ 3.51   $ 8.01 $ 6.56  
Diluted (in dollars per share) | $ / shares $ 3.78   $ 3.49   $ 7.94 $ 6.52  
Antidilutive securities excluded from computation of earnings per share amount 0   0   0 0  
Combined Repurchase Programs              
Equity Class Of Treasury Stock [Line Items]              
Number of share repurchase programs approved by Board of Directors | share_repurchase_program             2
Stock repurchase program, number of shares authorized to be repurchased 11,800,000       11,800,000   20,000,000
Stock repurchased during period, shares         2,600,000    
Payments for repurchase of equity | $         $ 250