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EARNINGS PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table is a reconciliation of weighted-average shares for calculating basic and diluted earnings per share:
| Three Months Ended June 30, | Six Months Ended June 30,
(In millions, except per share amounts) | 2025 |  | 2024 | 2025 |  | 2024
Net earnings from continuing operations attributable to Owens Corning | $ | 334 |  |  | $ | 256 |  | $ | 589 |  |  | $ | 534 |
Net earnings (loss) from discontinued operations attributable to Owens Corning, net of tax | 29 |  |  | 29 |  | (319) |  |  | 50 |
NET EARNINGS ATTRIBUTABLE TO OWENS CORNING | $ | 363 |  |  | $ | 285 |  | $ | 270 |  |  | $ | 584 |
Weighted-average number of shares outstanding used for basic earnings per share | 85.0 |  |  | 87.2 |  | 85.4 |  |  | 87.3 |
Unvested restricted stock units and performance share units | 0.5 |  |  | 0.8 |  | 0.5 |  |  | 0.8 |
Weighted-average number of shares outstanding and common equivalent shares used for diluted earnings per share | 85.5 |  |  | 88.0 |  | 85.9 |  |  | 88.1 |
Earnings (Loss) per common share attributable to Owens Corning common stockholders: |  |  |  |  |  |
Basic - continuing operations | $ | 3.93 |  |  | $ | 2.94 |  | $ | 6.90 |  |  | $ | 6.12 |
Basic - discontinued operations | $ | 0.34 |  |  | $ | 0.33 |  | $ | (3.74) |  |  | $ | 0.57 |
Basic | $ | 4.27 |  |  | $ | 3.27 |  | $ | 3.16 |  |  | $ | 6.69 |
Diluted - continuing operations | $ | 3.91 |  |  | $ | 2.91 |  | $ | 6.86 |  |  | $ | 6.06 |
Diluted - discontinued operations | $ | 0.34 |  |  | $ | 0.33 |  | $ | (3.71) |  |  | $ | 0.57 |
Diluted | $ | 4.25 |  |  | $ | 3.24 |  | $ | 3.15 |  |  | $ | 6.63 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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