EARNINGS PER SHARE (DETAIL) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share Abstract
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING	$ 21	$ 49	$ 141	$ 71
Weighted Average Common Shares, Basic	117.4	119.1	117.6	118.8
Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends	0.4	0.7	0.4	0.6
Incremental Common Shares Attributable To Call Options And Warrants	0.5	0.6	0.5	0.5
Weighted Average Number Diluted Shares Outstanding Adjustment	118.3	120.4	118.5	119.9
Earnings Per Share Basic	$ 0.18	$ 0.41	$ 1.20	$ 0.60
Earnings Per Share Diluted	$ 0.18	$ 0.41	$ 1.19	$ 0.59
Equity Class Of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	7.7		7.7
Purchase of treasury stock	$ 12		$ 44	$ 9
Repurchase Program 2012 [Member]
Equity Class Of Treasury Stock [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	10		10
EmployeeStock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	1.0
Series A Warrants [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount			17.5
Series B Warrants [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount			7.8
Restricted Stock Member
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	0.2		0.2