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EARNINGS PER SHARE (Tables) | 3 Months Ended
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Mar. 31, 2024
Earnings Per Share [Abstract] |
Basic and Diluted Earnings Per Share Table |
|  |  | Three Months Ended March 31,
|  |  |  |  | 2024 |  | 2023
Computation of Net Income per Share |  |  |  |  | (In millions, except per share data)
Net income |  |  |  |  | $ | 47.8 |  |  | $ | 154.0 |
Net loss attributable to noncontrolling interests |  |  |  |  | (0.8) |  |  | (2.3) |
Net income attributable to Olin Corporation |  |  |  |  | $ | 48.6 |  |  | $ | 156.3 |
Basic shares |  |  |  |  | 119.9 |  |  | 131.0 |
Basic net income attributable to Olin Corporation per share |  |  |  |  | $ | 0.41 |  |  | $ | 1.19 |
Diluted shares: |  |  |  |  |  |  |
Basic shares |  |  |  |  | 119.9 |  |  | 131.0 |
Stock-based compensation |  |  |  |  | 2.0 |  |  | 3.4 |
Diluted shares |  |  |  |  | 121.9 |  |  | 134.4 |
Diluted net income attributable to Olin Corporation per share |  |  |  |  | $ | 0.40 |  |  | $ | 1.16 |

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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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