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Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted net income attributable to Trinity Industries, Inc.:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (in millions, except per share amounts)
Income from continuing operations | $ | 37.1 |  |  | $ | 40.8 |  |  | $ | 88.0 |  |  | $ | 130.6 |
Less: Net income attributable to noncontrolling interest | (5.7) |  |  | (4.1) |  |  | (16.6) |  |  | (9.8) |
Net income from continuing operations attributable to Trinity Industries, Inc. | 31.4 |  |  | 36.7 |  |  | 71.4 |  |  | 120.8 |
Net loss from discontinued operations attributable to Trinity Industries, Inc. | (1.1) |  |  | (5.3) |  |  | (4.9) |  |  | (11.3) |
Net income attributable to Trinity Industries, Inc. | $ | 30.3 |  |  | $ | 31.4 |  |  | $ | 66.5 |  |  | $ | 109.5 |
Basic weighted average shares outstanding | 80.5 |  |  | 82.2 |  |  | 81.1 |  |  | 81.9 |
Effect of dilutive securities | 1.4 |  |  | 1.9 |  |  | 2.0 |  |  | 2.0 |
Diluted weighted average shares outstanding | 81.9 |  |  | 84.1 |  |  | 83.1 |  |  | 83.9 |
Basic earnings per common share: |  |  |  |  |  |  |
Income from continuing operations | $ | 0.39 |  |  | $ | 0.45 |  |  | $ | 0.88 |  |  | $ | 1.48 |
Loss from discontinued operations | (0.01) |  |  | (0.07) |  |  | (0.06) |  |  | (0.14) |
Net income attributable to Trinity Industries, Inc. | $ | 0.38 |  |  | $ | 0.38 |  |  | $ | 0.82 |  |  | $ | 1.34 |
Diluted earnings per common share: |  |  |  |  |  |  |
Income from continuing operations | $ | 0.38 |  |  | $ | 0.44 |  |  | $ | 0.86 |  |  | $ | 1.44 |
Loss from discontinued operations | (0.01) |  |  | (0.07) |  |  | (0.06) |  |  | (0.13) |
Net income attributable to Trinity Industries, Inc. | $ | 0.37 |  |  | $ | 0.37 |  |  | $ | 0.80 |  |  | $ | 1.31 |
Potentially dilutive securities excluded from EPS calculation: |  |  |  |  |  |  |
Antidilutive restricted shares | 0.1 |  |  | — |  |  | 0.1 |  |  | — |
Antidilutive stock options | — |  |  | — |  |  | — |  |  | — |
Note: Earnings per common share is calculated independently for each component and may not sum to total net income attributable to Trinity Industries, Inc. per common share due to rounding.

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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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