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Note 10. Employee Retirement Plans Cash Flows (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($)
Retirement Benefits [Abstract] |
Defined Contribution Plan, Expected Future Employer Discretionary Contributions, Next Fiscal Year | $ 8.7
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 8.6

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- Definition Defined Contribution Plan, Expected Future Employer Discretionary Contributions, Next Fiscal Year + References No definition available. + Details
Name: | trn_DefinedContributionPlanExpectedFutureEmployerDiscretionaryContributionsNextFiscalYear
Namespace Prefix: | trn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration