CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
NET SALES	$ 9,677	$ 9,761	$ 8,498
COST OF SALES	6,994	7,145	6,281
Gross margin	2,683	2,616	2,217
OPERATING EXPENSES
Marketing and administrative expenses	831	803	757
Science and technology expenses	123	106	91
Gain on sale of site	(189)	0	0
Gain on equity method investment	0	(130)	0
Other expense (income), net	106	123	(69)
Total operating expenses	871	902	779
OPERATING INCOME	1,812	1,714	1,438
Non-operating expense (income), net	145	(9)	(10)
EARNINGS BEFORE INTEREST AND TAXES	1,667	1,723	1,448
Interest expense, net	76	109	126
Loss on extinguishment of debt	0	0	9
EARNINGS BEFORE TAXES	1,591	1,614	1,313
Income tax expense	401	373	319
Equity in net earnings of affiliates	3	0	1
NET EARNINGS	1,193	1,241	995
Net loss attributable to non-redeemable and redeemable noncontrolling interests	(3)	0	0
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING	$ 1,196	$ 1,241	$ 995
EARNINGS PER COMMON SHARE ATTRIBUTABLE TO OWENS CORNING COMMON STOCKHOLDERS
Basic (dollars per share)	$ 13.27	$ 12.85	$ 9.61
Diluted (dollars per share)	$ 13.14	$ 12.70	$ 9.54
WEIGHTED AVERAGE COMMON SHARES
Basic (in shares)	90.1	96.6	103.5
Diluted (in shares)	91.0	97.7	104.3