Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average number of shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Equity Method Investment, JV Majority Ownership Percentage Equity Method Investment, JV Majority Ownership Percentage Equity Method Investment, Joint Venture Majority Ownership Percentage Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Common stock – 400.0 shares authorized Common Stock, Value, Issued Purchase of shares to satisfy employee tax on vested stock Payment, Tax Withholding, Share-Based Payment Arrangement Loss Contingency Accrual Loss Contingency Accrual Recourse Status [Axis] Recourse Status [Axis] Line of Credit [Member] Line of Credit [Member] Line of Credit [Member] Restatement Determination Date Restatement Determination Date TILC Back to Back Swap Agreements - Open TILC Back to Back Swap Agreements - Open [Member] TILC Back to Back Swap Agreements - Open Derivative Instrument [Axis] Derivative Instrument [Axis] Restricted shares, net, (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Fair Value by Measurement Frequency [Axis] Measurement Frequency [Axis] Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss Loss from discontinued operations, net of benefit for income taxes of $1.2, $1.1, $2.9, and $2.2 Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Net Book Value of Unpledged Equipment Net Book Value of Unpledged Equipment Net Book Value of Unpledged Equipment. Amendment Flag Amendment Flag Proceeds from Sale of Equity Method Investments Proceeds from Sale of Equity Method Investments Consolidated Entities [Axis] Consolidated Entities [Axis] Accounts Receivable, Credit Loss Expense (Reversal) Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gain (Loss) on Disposition of Other Assets Gain (Loss) on Disposition of Other Assets Loss Contingencies [Table] Loss Contingencies [Table] Leases [Abstract] Leases [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Leasing and Management [Member] Leasing and Management [Member] Leasing and Management. Consolidated Entities [Domain] Consolidated Entities [Domain] Sales-type Lease, Selling Profit (Loss) Sales-type Lease, Selling Profit (Loss) Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property, Plant, and Equipment [Abstract] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Loss Contingency, Receivable Loss Contingency, Receivable $0.01 Par Value Common Stock, Par or Stated Value Per Share Foreign currency translation adjustments, net of tax benefit of $—, $—, $—, and $— Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Segment Reporting, Long-Lived Asset, Expenditure for Addition Segment Reporting, Long-Lived Asset, Expenditure for Addition Inflation Reduction Act - Payment to Acquire Federal Tax Credits Inflation Reduction Act - Payment to Acquire Federal Tax Credits Inflation Reduction Act - Payment to Acquire Federal Tax Credits External Customers External Customers [Member] External Customers [Member] Derivative, Notional Amount Derivative, Notional Amount Weighted Average Number of Shares Outstanding, Basic Basic weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Debt Instrument, Collateral Amount Debt Instrument, Collateral Amount Share-based Payment Arrangement, Activity [Table Text Block] Share-Based Payment Arrangement, Activity [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of Reportable Segments Number of Reportable Segments Cash Divested from Deconsolidation Cash Divested from Deconsolidation Gains on dispositions of property and other divestitures: Gain (Loss) on Disposition of Assets [Abstract] Noncash or Part Noncash Acquisition, Investments Acquired Noncash or Part Noncash Acquisition, Investments Acquired Work in process Inventory, Work in Process, Net of Reserves Entity Address, City or Town Entity Address, City or Town Number of Shares Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Line of Credit Facility, Interest Rate at Period End Line of Credit Facility, Interest Rate at Period End Net income attributable to Trinity Industries, Inc. Net Income (Loss) Available to Common Stockholders, Basic RIV Partnerships RIV Partnerships [Member] RIV Partnerships Inventories: Inventory, Net [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Other (income) expense: Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Other Comprehensive Income (Loss), Net of Tax, Total Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Operating Segment Assets Operating Segment Assets Operating Segment Assets Ohio Train Derailment Litigation Ohio Train Derailment Litigation [Member] Ohio Train Derailment Litigation Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Net cash provided by operating activities – continuing operations Cash Provided by (Used in) Operating Activity, Continuing Operation Treasury stock Treasury Stock, Value New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Litigation Case [Axis] Litigation Case [Axis] Land Land [Member] Segment Reporting [Table Text Block] Segment Reporting [Table Text Block] Noncontrolling Interest Noncontrolling Interest [Member] Gains on dispositions of property and other divestitures: Gain (Loss) on Disposition of Property Plant Equipment Rail Products [Domain] Rail Products [Domain] Rail Products Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Partially-Owned Leasing Subsidiaries Noncontrolling Interest Disclosure [Text Block] Repayments of Lines of Credit Repayments of Lines of Credit Proceeds From Sale Of Property Subject To Or Available For Operating Lease Proceeds From Sale Of Property Subject To Or Available For Operating Lease Proceeds from Sale of Property Subject to or Available For Operating Lease Property, Plant, and Equipment Property, Plant, and Equipment [Text Block] Proceeds from Debt, Net of Issuance Costs Proceeds from Debt, Net of Issuance Costs Net loss from discontinued operations attributable to Trinity Industries, Inc. Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic Document Period End Date Document Period End Date TRL-2025 Series 2026-1 Class A Green Secured Railcar Equipment Notes [Member] TRL-2025 Series 2026-1 Class A Green Secured Railcar Equipment Notes [Member] TRL-2025 Series 2026-1 Class A Green Secured Railcar Equipment Notes Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Debt Instrument, Face Amount Debt Instrument, Face Amount Security Exchange Name Security Exchange Name Segment Reporting, Reconciliation of Other Item by Segment to Consolidated Segment Reporting, Reconciliation of Other Item by Segment to Consolidated [Table Text Block] Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage Business Combination, Transaction Cost, Excluding Separately Recognized Transaction Business Combination, Transaction Cost, Excluding Separately Recognized Transaction Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Supplier Finance Program Supplier Finance Program [Text Block] Liabilities, Fair Value Disclosure Liabilities, Fair Value Disclosure Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Billed Contracts Receivable Billed Contracts Receivable Property, Plant, and Equipment [Table Text Block] Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Parts & Components Parts & Components [Member] Parts & Components Earnings Per Common Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Earnings Per Share [Abstract] Cost of revenues: Cost of Product and Service Sold [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Entity Trading Symbol Trading Symbol Foreign Currency Cash Flow Hedge Liability at Fair Value Foreign Currency Cash Flow Hedge Liability at Fair Value Capital expenditures – operating and administrative Payments to Acquire Property, Plant, and Equipment Schedule of Interest Rate Derivatives [Table Text Block] Schedule of Interest Rate Derivatives [Table Text Block] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Digital & Logistics Services Digital & Logistics Services [Member] Digital & Logistics Services Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Non-cash interest expense Amortization of Debt Issuance Costs and Discounts Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Noncontrolling Interest, Ownership Percentage by Parent Subsidiary, Ownership Percentage, Parent Stock Based Compensation - Grants [Abstract] Stock Based Compensation - Grants [Abstract] Stock Based Compensation - Grants [Abstract] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Derivatives Not Designated as Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] 7.75% Senior Notes Due 2028 7.75% Senior Notes Due 2028 [Member] 7.75% Senior Notes Due 2028 Credit Facility [Domain] Credit Facility [Domain] Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage Operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted Average Number of Shares Outstanding, Diluted Diluted weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Disposal Group Name [Domain] Disposal Group Name [Domain] Credit Loss [Abstract] Credit Loss [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Proceeds from Lines of Credit Proceeds from Lines of Credit Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Line of Credit Facility, Current Borrowing Capacity Line of Credit Facility, Current Borrowing Capacity Revenue from Contract with Customer [Abstract] Noncash or Part Noncash Divestitures [Line Items] Noncash or Part Noncash Divestitures [Line Items] Sustainable Railcar Conversions Sustainable Railcar Conversions [Member] Sustainable Railcar Conversions Award Timing Predetermined Award Timing Predetermined [Flag] Treasury Stock Treasury Stock, Common [Member] Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Net cash used in operating activities – discontinued operations Cash Provided by (Used in) Operating Activity, Discontinued Operation Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Fair Value, Inputs, Level 1 [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Effective Income Tax Rate Reconciliation, Tax Credit, Amount Effective Income Tax Rate Reconciliation, Tax Credit, Amount Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent Lessor, Lease, Description [Table] Lessor, Lease, Description [Table] Effect of dilutive securities Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Income from continuing operations Income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest All Executive Categories All Executive Categories [Member] Foreign Currency Cash Flow Hedge Asset at Fair Value Foreign Currency Cash Flow Hedge Asset at Fair Value Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Gain (Loss) on Sale of Property, Plant and Equipment, Railroad Transportation Equipment Gain (Loss) on Sale of Property, Plant and Equipment, Railroad Transportation Equipment Gain (Loss) on Sale of Property, Plant and Equipment, Railroad Transportation Equipment Gain (Loss) on Sale of Property, Plant and Equipment, Railroad Transportation Equipment Long-term Debt, Fair Value Long-Term Debt, Fair Value Maintenance services Maintenance services [Domain] Maintenance services Changes in accumulated other comprehensive loss AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] (Increase) decrease in income tax receivable Increase (Decrease) in Income Taxes Receivable Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Long-term Line of Credit Long-Term Line of Credit Intersegment Revenues Intersegment Revenues Intersegment Revenues Other Equipment Financing Other Equipment Financing [Member] Other Equipment Financing Dividends paid to common shareholders Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Net decrease in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation TILC [Member] TILC [Member] TILC [Member] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Restricted cash, including partially-owned subsidiary of $— and $9.9 Restricted Cash and Cash Equivalent Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Continuing Operations, Per Diluted Share Income (Loss) from Continuing Operations, Per Basic Share Income (Loss) from Continuing Operations, Per Basic Share Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash and Cash Equivalents, Fair Value Disclosure Cash and Cash Equivalents, Fair Value Disclosure Total stockholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Equity, Including Portion Attributable to Noncontrolling Interest Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price Other liabilities Other Liabilities Disposal Group, Including Discontinued Operations [Line Items] Disposal Group, Including Discontinued Operations [Line Items] Loss Contingency, Estimate of Possible Loss Loss Contingency, Estimate of Possible Loss Buildings and improvements Building and Building Improvements [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] TRL-2019 Series 2019-2 Secured Railcar Equipment Notes TRL-2019 Series 2019-2 Secured Railcar Equipment Notes [Member] TRL-2019 Series 2019-2 Secured Railcar Equipment Notes Common Stock, Shares Authorized Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Components of debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Exercise Price Award Exercise Price Settlement of share-based awards, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Fair Value, Recurring [Member] Fair Value, Recurring [Member] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Railcars on Lease [Member] Railcars on Lease [Member] Railcars on Lease Interest Rate Swap [Member] Interest Rate Swap [Member] Receivables, net of allowance Accounts Receivable, after Allowance for Credit Loss Debt Debt Disclosure [Text Block] Debt, Net of Unamortized Premium and Unamortized Discount, Gross of Unamortized Debt Issuance Costs Debt, Net of Unamortized Premium and Unamortized Discount, Gross of Unamortized Debt Issuance Costs Debt, Net of Unamortized Premium and Unamortized Discount, Gross of Unamortized Debt Issuance Costs Leasing & Services Railcar Leasing and Services Group [Member] Railcar Leasing and Services Group [Member] Railcar leasing and Services Group Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Method Investments Equity Method Investments Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Debt [Member] Secured Debt [Member] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Manufacturing Manufacturing [Member] Manufacturing [Member] Adoption Date Trading Arrangement Adoption Date Open Interest Rate Swaps Open Interest Rate Swaps [Member] Open Interest Rate Swaps Payments to Acquire Equity Method Investments Payments to Acquire Equity Method Investments Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Cash dividends declared on common stock (1) Dividends, Common Stock, Cash Trinity stockholders' equity Equity, Attributable to Parent Other (income) expense: Other (income) expense Nonoperating Income (Expense) ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount TRL-2026 Term Loan [Member] TRL-2026 Term Loan [Member] TRL-2026 Term Loan Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Railroad Transportation Equipment [Member] Railroad Transportation Equipment [Member] Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance units Performance Shares [Member] Interest Rate Cash Flow Hedge Asset at Fair Value Interest Rate Cash Flow Hedge Asset at Fair Value Provision for deferred income taxes Deferred Income Tax Expense (Benefit) Selling, engineering, and administrative expenses Selling, engineering, and administrative expenses Selling, General and Administrative Expense Repayments of Debt Repayments of Debt Letter of Credit [Member] Letter of Credit [Member] Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restricted stock units Restricted Stock Units (RSUs) [Member] Entity Central Index Key Entity Central Index Key Line Of Credit Facility Additional Borrowing Capacity Line Of Credit Facility Additional Borrowing Capacity Line Of Credit Facility Additional Borrowing Capacity Less accumulated depreciation, including partially-owned subsidiary of $— and $205.3 Less: accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Other comprehensive income (loss), net of tax, before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Restricted stock awards Restricted Share Awards [Member] Restricted Share Awards [Member] Designated as Hedging Instrument [Member] Designated as Hedging Instrument [Member] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] City Area Code City Area Code Income Tax Disclosure [Table] Income Tax Disclosure [Table] Income Tax Disclosure Restricted Stock [Member] Restricted Stock [Member] Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Corporate Segment [Member] Corporate Segment [Member] Corporate Segment [Member] Name Forgone Recovery, Individual Name Inflation Reduction Act - Purchase of Federal Tax Credits Inflation Reduction Act - Purchase of Federal Tax Credits Inflation Reduction Act - Purchase of Federal Tax Credits Finished goods Inventory, Finished Goods, Net of Reserves Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Recourse Status [Domain] Recourse Status [Domain] Statement [Line Items] Statement [Line Items] Total assets Assets Assets Entity [Domain] Entity [Domain] Amortization of net actuarial losses, net of tax benefit of $—, $—, $—, and $— Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] TRL-2023 Term Loan TRL-2023 Term Loan [Member] TRL-2023 Term Loan Operating Segments [Member] Operating Segments [Member] Operating Segments [Member] Share-based Payment Arrangement [Text Block] Share-Based Payment Arrangement [Text Block] (Increase) decrease in other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Debt: Debt, Long-Term and Short-Term, Combined Amount Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Share-Based Payment Arrangement, Expense Share-Based Payment Arrangement, Expense Goodwill Goodwill Wholly-owned subsidiaries Wholly Owned Subsidiaries [Member] Wholly Owned Subsidiaries [Member] Wholly Owned Subsidiaries Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Discontinued Operation, Tax Effect of Discontinued Operation Discontinued Operation, Tax Effect of Discontinued Operation Weighted Average Grant-Date Fair Value per Award Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Subsequent Event Type [Domain] Subsequent Event Type [Domain] Noncontrolling Interest, Decrease from Deconsolidation Noncontrolling Interest, Decrease from Deconsolidation Retained Earnings Retained Earnings [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Net actuarial gains/(losses) of defined benefit plans Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] TRL-2025 Series 2026-1 Class B Green Secured Railcar Equipment Notes [Member] TRL-2025 Series 2026-1 Class B Green Secured Railcar Equipment Notes [Member] TRL-2025 Series 2026-1 Class B Green Secured Railcar Equipment Notes Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Unrealized gains arising during the period, net of tax expense of $3.5, $0.8, $8.5 and $0.4 OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Award Timing Disclosures [Line Items] Accumulated Foreign Currency Adjustment Attributable to Parent Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Payments of Debt Issuance Costs Payments of Debt Issuance Costs Earnings Per Share, Diluted, Total Earnings Per Share, Diluted Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Operating Lease, Variable Lease Income Operating Lease, Variable Lease Income Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Litigation Case [Domain] Litigation Case [Domain] Rail Products Group [Member] Rail Products Group [Member] Rail Products Group. Ownership [Domain] Ownership [Domain] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Accounts Receivable, Allowance for Credit Loss, Writeoff Accounts Receivable, Allowance for Credit Loss, Writeoff Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Reclassification from AOCI, Current Period, Tax Reclassification from AOCI, Current Period, Tax Financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility, Remaining Borrowing Capacity Payments to Acquire Interest in Joint Venture Payments to Acquire Interest in Joint Venture Derivative Asset Derivative Asset Deferred income taxes Deferred Income Taxes and Other Tax Liabilities, Noncurrent Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Less: comprehensive income (loss) attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Revenue from Contract with Customer Revenue from Contract with Customer [Text Block] Gains on dispositions of property and other assets Gain (Loss) on Disposition of Property, Plant and Equipment, Other Gain (Loss) on Disposition of Property, Plant and Equipment, Other Construction in progress Construction in Progress [Member] (Increase) decrease in inventories Increase (Decrease) in Inventories Raw materials and supplies Inventory, Raw Materials and Supplies, Net of Reserves Distributions to noncontrolling interest Proceeds from (Payments to) Noncontrolling Interests Segment Reporting [Table] Segment Reporting [Table] Selling, engineering, and administrative expenses Selling, General and Administrative Expense [Abstract] Recourse Recourse [Member] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Total operating profit Operating Profit (Loss) Operating Income (Loss) Maintenance and compliance expense (5) Cost, Maintenance Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Cash, Cash Equivalents, and Restricted Cash Period Increase (Decrease), Excluding Exchange Rate Effect [Abstract] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation [Abstract] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Common Stock, Dividends, Per Share, Declared Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] TILC Warehouse Facility [Member] TILC Warehouse Facility [Member] TILC Warehouse Facility [Member] TILC Warehouse Facility [Member] TILC Warehouse Back to Back Swap Agreements - Open TILC Warehouse Back to Back Swap Agreements - Open [Member] TILC Warehouse Back to Back Swap Agreements - Open Distributions to noncontrolling interest Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Senior Notes Senior Notes Common Stock, Shares, Issued Common Stock, Shares, Issued Measure: Measure [Axis] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Treasury Stock, Common, Shares Treasury Stock, Common, Shares Revenue, remaining performance obligation expected to be delivered in current year Revenue, remaining performance obligation expected to be delivered in current year Revenue, remaining performance obligation expected to be delivered in current year Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Statement, Equity Components [Axis] Equity Components [Axis] Equity Components [Axis] (Increase) decrease in receivables Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Schedule of Foreign Exchange Contracts, Statement of Financial Position Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block] Entity Interactive Data Current Entity Interactive Data Current Net income (loss) attributable to noncontrolling interest Less: Net (income) loss attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Partially-owned subsidiaries Partially-Owned Subsidiaries [Member] Partially-Owned Subsidiaries [Member] Partially-Owned Subsidiaries [Member] Supplier Finance Program [Line Items] Supplier Finance Program [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Supplier Finance Program [Domain] Supplier Finance Program [Domain] Entity Small Business Entity Small Business Comprehensive income attributable to Trinity Industries, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Debt Instrument, Unamortized Discount Debt Instrument, Unamortized Discount Termination Date Trading Arrangement Termination Date Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Discontinued Operations, Policy Discontinued Operations, Policy [Policy Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Interest expense, net Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Fair Value as of Grant Date Award Grant Date Fair Value Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] External Revenue External Revenue External Revenue Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Registrant Name Entity Registrant Name Entity Address, Postal Zip Code Entity Address, Postal Zip Code Nonrecourse Nonrecourse [Member] Income from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Supplier Finance Program [Axis] Supplier Finance Program [Axis] Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Revenues Revenues, Total Revenues Property, plant, and equipment, at cost, including partially-owned subsidiary of $— and $523.9 Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Machinery and other Machinery and Equipment [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Noncash or Part Noncash Divestitures [Table] Noncash or Part Noncash Divestitures [Table] Executive Category: Executive Category [Axis] Secured Debt, Other Secured Debt, Other Signal Rail Holdings LLC Signal Rail Holdings LLC [Member] Signal Rail Holdings LLC TRL-2025 Series 2026-1 Green Secured Railcar Equipment Notes TRL-2025 Series 2026-1 Green Secured Railcar Equipment Notes [Member] TRL-2025 Series 2026-1 Green Secured Railcar Equipment Notes Tribute Rail LLC Tribute Rail LLC [Member] Tribute Rail LLC Noncash or Part Noncash Divestiture, Net Monetary Assets Divested Noncash or Part Noncash Divestiture, Net Monetary Assets Divested Noncash or Part Noncash Divestiture, Net Monetary Assets Divested Liabilities and Equity [Abstract] Liabilities and Equity [Abstract] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Supplier Finance Program, Obligation Supplier Finance Program, Obligation Inventory, Net Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Accounting Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Reclassification adjustments for gains included in net income, net of tax expense of $0.4, $1.0, $1.7, and $0.5 Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax Increase (decrease) in accrued liabilities Increase (Decrease) in Accrued Liabilities Unrealized gains/(losses) on derivative financial instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Segment Reporting, Other Segment Item, Amount Segment Reporting, Other Segment Item, Amount Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Payments to settle contingent consideration liability Payment for Contingent Consideration Liability, Financing Activities Other assets Other Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Treasury Stock, Value, Acquired, Cost Method Treasury Stock, Value, Acquired, Cost Method Cash, cash equivalents, and restricted cash at beginning of period Cash, cash equivalents, and restricted cash at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Operating Lease, Lease Income, Lease Payments Operating Lease, Lease Income, Lease Payments Increase (decrease) in accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument [Axis] Debt Instrument [Axis] Negative Accumulated Depreciation PP&E- Deferred Profit Negative Accumulated Depreciation PP&E- Deferred Profit Negative Accumulated Depreciation PP&E- Deferred Profit Measurement Frequency [Domain] Measurement Frequency [Domain] Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense TRIP Holdings [Member] TRIP Holdings [Member] TRIP Holdings [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Customer [Domain] Customer [Domain] Investment, Name [Domain] Investment, Name [Domain] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Earnings Per Share, Basic, Total Earnings Per Share, Basic Earnings Per Share, Basic Payments for Repurchase of Common Stock Payments for Repurchase of Common Stock Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Supplier Finance Program [Table] Supplier Finance Program [Table] Payments to retire debt Repayment of Long-Term Debt, Long-Term Lease Obligation, and Capital Security Sale of Highway Products Sale of Highway Products [Member] Sale of Highway Products Cost of Revenue Cost of Revenue Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Award Type [Axis] Award Type [Axis] Schedule of Share-Based Payment Award, Performance Units, Valuation Assumptions Schedule of Share-Based Payment Award, Performance Units, Valuation Assumptions [Table Text Block] Schedule of Share-Based Payment Award, Performance Units, Valuation Assumptions Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Sales-type Lease, Interest Income Sales-type Lease, Interest Income Retained earnings Retained Earnings (Accumulated Deficit) Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Operating Lease, Lease Income Operating Lease, Lease Income [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Proceeds from dispositions of property and other assets Proceeds from Sale of Other Productive Assets Carrying Value of Investment In Partially-Owned Consolidated Subsidiary Carrying Value of Investment In Partially-Owned Consolidated Subsidiary Carrying Value of Investment In Partially-Owned Consolidated Subsidiary Derivative Contract [Domain] Derivative Contract [Domain] Restricted cash Restricted Cash Fair Value Disclosure This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value. Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Supply Chain Finance Program [Abstract] Supply Chain Finance Program Capital expenditures – lease fleet Payments to Acquire Equipment on Lease Total liabilities and stockholders' equity Liabilities and Equity Stock options Share-Based Payment Arrangement, Option [Member] Noncontrolling interest Equity, Attributable to Noncontrolling Interest Increase (decrease) in other liabilities Increase (Decrease) in Other Operating Liabilities Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Tabular List, Table Tabular List [Table Text Block] Capital in excess of par value Additional Paid in Capital Derecognition of Membership Interest, Net Assets Derecognition of Membership Interest, Net Assets Derecognition of Membership Interest, Net Assets Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Trinity Stockholders’ Equity Parent [Member] Other Nonoperating Income Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization [Abstract] Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization [Abstract] Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock – 1.5 shares authorized and unissued Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] Amounts reclassified from AOCI, net of tax expense of $—, $1.7, $—, and $1.7 Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Hedging Designation [Domain] Hedging Designation [Domain] Environmental and Workplace Matters [Member] Environmental and Workplace Matters [Member] Environmental and Workplace Matters Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Interest Rate Cash Flow Hedge Liability at Fair Value Interest Rate Cash Flow Hedge Liability at Fair Value Hedging Designation [Axis] Hedging Designation [Axis] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Touax Texmaco Railcar Leasing Private Limited Touax Texmaco Railcar Leasing Private Limited [Member] Touax Texmaco Railcar Leasing Private Limited Assets, Fair Value Disclosure Assets, Fair Value Disclosure Operating & Administrative Assets [Member] Operating & Administrative Assets [Member] Operating & Administrative Assets Accounts payable Accounts Payable Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Fair Value Hierarchy and NAV [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Other Other Noncash Income (Expense) Debt Instrument [Line Items] Debt Instrument [Line Items] Preferred Stock, Shares Subscribed but Unissued Preferred Stock, Shares Subscribed but Unissued Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Corporate Segment and Other Operating Segment Corporate Segment and Other Operating Segment [Member] Capital in Excess of Par Value Additional Paid-in Capital [Member] Gain on Divestiture of Partially-owned Leasing Subsidiary Gain on Divestiture of Partially-owned Leasing Subsidiary Gain on Divestiture of Partially-owned Leasing Subsidiary Gain on Divestiture of Partially-owned Leasing Subsidiary Entity Filer Category Entity Filer Category Accrued liabilities Accrued Liabilities Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Retirement of treasury stock Treasury Stock, Retired, Cost Method, Amount Company Selected Measure Amount Company Selected Measure Amount Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Income tax receivable Income Taxes Receivable Depreciation and amortization Depreciation, Depletion and Amortization Net income from continuing operations attributable to Trinity Industries, Inc. Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Interest Rate Cap [Member] Interest Rate Cap [Member] Derivative Liability Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One TRL-2019 Series 2019-1 Secured Railcar Equipment Notes [Member] TRL-2019 Series 2019-1 Secured Railcar Equipment Notes [Member] TRL-2019 Series 2019-1 Secured Railcar Equipment Notes Provision for income taxes Income Tax Expense (Benefit) Cost of revenues: Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Consolidation, Policy [Policy Text Block] Consolidation, Policy [Policy Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] NP SPE Holdings LP NP SPE Holdings LP [Member] NP SPE Holdings LP Net income attributable to Trinity Industries, Inc. Net Income (Loss) Attributable to Parent Senior Notes due 2028 Senior Notes due 2028 [Member] Senior Notes due 2028 Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Less: unamortized debt issuance costs Unamortized Debt Issuance Expense Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Debt Instrument, Unamortized Premium Debt Instrument, Unamortized Premium Remaining Performance Obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Triumph Rail Holdings LLC Triumph Rail Holdings LLC [Member] Triumph Rail Holdings LLC Contract with Customer, Contract Asset, Contract Liability, and Receivable Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] Income Tax Disclosure Revenues [Abstract] Revenues [Abstract] Treasury Stock, Shares, Retired Treasury Stock, Shares, Retired Accounts Receivable, Allowance for Credit Loss, Recovery Accounts Receivable, Allowance for Credit Loss, Recovery Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]