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Earnings (Loss) per Share (Tables) | 3 Months Ended
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Mar. 30, 2025
Earnings (Loss) per Share [Abstract] |
Computation of Basic and Diluted Earnings (Loss) per Share | The following table sets forth the computation of basic and diluted earnings (loss) per share:
|  | Three Months Ended |
(in millions, except per share data) |  | Mar. 30, 2025 |  |  | Mar. 31, 2024 |
Net income (loss) attributable to Minerals Technologies Inc. |  | $ | (144.0 | ) |  | $ | 46.7 |
Weighted average shares outstanding |  |  | 31.9 |  |  |  | 32.3 |
Dilutive effect of stock options and deferred restricted stock units |  |  | — |  |  |  | 0.1 |
Weighted average shares outstanding, adjusted |  |  | 31.9 |  |  |  | 32.4 |
Basic earnings (loss) per share attributable to Minerals Technologies Inc. |  | $ | (4.51 | ) |  | $ | 1.45 |
Diluted earnings (loss) per share attributable to Minerals Technologies Inc. |  | $ | (4.51 | ) |  | $ | 1.44 |

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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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