Contingencies - Narrative (Details) $ in Millions	Sep. 30, 2025 USD ($)
Accrued Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	$ 8.8
Ohio Train Derailment Litigation \| Ohio Train Derailment Litigation
Loss Contingencies [Line Items]
Loss Contingency Accrual	0.0
Environmental and Workplace Matters [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	1.1
Minimum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	7.4
Maximum
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 18.7

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

TRINITY INDUSTRIES INC 10-Q