Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Net income | $ 98.3 | $ 20.0 | $ 123.1 | $ 47.1 |
| Other comprehensive income (loss): | ||||
| Unrealized gains (losses) arising during the period, net of tax benefit (expense) of $(2.7), $(0.2), $(5.0) and $0.4 | 8.7 | 0.5 | 16.1 | (1.5) |
| Reclassification adjustments for (gains) losses included in net income, net of tax benefit (expense) of $(0.6), $—, $(1.3), and $0.5 | (1.8) | (0.4) | (4.0) | 1.7 |
| Amortization of net actuarial losses, net of tax benefit of $—, $—, $—, and $— | 0.1 | 0.0 | 0.1 | 0.0 |
| Other Comprehensive Income (Loss), Net of Tax, Total | 7.0 | 0.1 | 12.2 | 0.2 |
| Comprehensive income | 105.3 | 20.1 | 135.3 | 47.3 |
| Less: comprehensive income attributable to noncontrolling interest | 0.0 | 6.0 | 0.6 | 11.1 |
| Comprehensive income attributable to Trinity Industries, Inc. | $ 105.3 | $ 14.1 | $ 134.7 | $ 36.2 |
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount, after tax, of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|