EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Oct. 24, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net earnings attributable to Owens Corning	$ 96	$ 138	$ 197	$ 195
Weighted-average number of shares outstanding used for basic earnings per share	111,600,000	115,100,000	112,000,000	115,300,000
Non-vested restricted and performance shares	1,200,000	800,000	1,200,000	800,000
Options to purchase common stock	300,000	500,000	300,000	400,000
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings per share	113,100,000	116,400,000	113,500,000	116,500,000
Basic (in dollars per share)	$ 0.86	$ 1.20	$ 1.76	$ 1.69
Diluted (in dollars per share)	$ 0.85	$ 1.19	$ 1.74	$ 1.67
Equity Class Of Treasury Stock [Line Items]
Stock repurchased during period, shares			2,000,000
Payments for repurchase of equity			$ 121
Stock repurchase program, remaining number of shares authorized to be repurchased	7,800,000		7,800,000
Repurchase Program 2016
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, number of shares authorized to be repurchased					10,000,000
Performance Shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	0	100,000	0	100,000