CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE EARNINGS (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	$ 92	$ 101
Currency translation adjustment (net of tax)	(15)	36
Pension and other postretirement adjustment (net of tax)	(2)	0
Hedging adjustment (net of tax)	1	(2)
COMPREHENSIVE EARNINGS	76	135
Comprehensive earnings attributable to noncontrolling interests	0	0
COMPREHENSIVE EARNINGS ATTRIBUTABLE TO OWENS CORNING	76	135
Consolidation, Eliminations
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	(179)	(187)
Currency translation adjustment (net of tax)	(5)	(37)
Pension and other postretirement adjustment (net of tax)	5	3
Hedging adjustment (net of tax)	0	0
COMPREHENSIVE EARNINGS	(179)	(221)
Comprehensive earnings attributable to noncontrolling interests	0	0
COMPREHENSIVE EARNINGS ATTRIBUTABLE TO OWENS CORNING	(179)	(221)
Parent Company
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	92	101
Currency translation adjustment (net of tax)	(15)	36
Pension and other postretirement adjustment (net of tax)	(2)	0
Hedging adjustment (net of tax)	1	(2)
COMPREHENSIVE EARNINGS	76	135
Comprehensive earnings attributable to noncontrolling interests	0	0
COMPREHENSIVE EARNINGS ATTRIBUTABLE TO OWENS CORNING	76	135
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	127	131
Currency translation adjustment (net of tax)	1	1
Pension and other postretirement adjustment (net of tax)	(4)	(1)
Hedging adjustment (net of tax)	0	0
COMPREHENSIVE EARNINGS	124	131
Comprehensive earnings attributable to noncontrolling interests	0	0
COMPREHENSIVE EARNINGS ATTRIBUTABLE TO OWENS CORNING	124	131
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
NET EARNINGS	52	56
Currency translation adjustment (net of tax)	4	36
Pension and other postretirement adjustment (net of tax)	(1)	(2)
Hedging adjustment (net of tax)	0	0
COMPREHENSIVE EARNINGS	55	90
Comprehensive earnings attributable to noncontrolling interests	0	0
COMPREHENSIVE EARNINGS ATTRIBUTABLE TO OWENS CORNING	$ 55	$ 90

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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-Topic 220
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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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