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Summary of Significant Accounting Policies (Policies) | 9 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Consolidation, Policy [Policy Text Block] | Basis of Presentation The foregoing Consolidated Financial Statements are unaudited and have been prepared from the books and records of Trinity Industries, Inc. and Subsidiaries (“Trinity,” “Company,” “we,” “our,” or "us"), which include the accounts of our wholly-owned subsidiaries and partially-owned subsidiaries, TRIP Rail Holdings LLC (“TRIP Holdings”), RIV 2013 Rail Holdings LLC ("RIV 2013"), and Trinity Global Ventures Limited ("Trinity Global Ventures"), in which we have a controlling interest. In our opinion, all normal and recurring adjustments necessary for a fair presentation of our financial position as of September 30, 2025, the results of operations for the three and nine months ended September 30, 2025 and 2024, and cash flows for the nine months ended September 30, 2025 and 2024 have been made in conformity with generally accepted accounting principles. All significant intercompany accounts and transactions have been eliminated. Certain prior year balances have been reclassified to conform to the 2025 presentation. Due to seasonal and other factors, the results of operations for the nine months ended September 30, 2025 may not be indicative of expected results of operations for the year ending December 31, 2025. These interim financial statements and notes are condensed as permitted by the instructions to Form 10-Q and should be read in conjunction with our audited Consolidated Financial Statements included in our Form 10-K for the year ended December 31, 2024.
Revenue [Policy Text Block] | Revenue Recognition Revenue associated with our railcar lease contracts is recognized in accordance with Accounting Standards Codification ("ASC") 842, Leases. Revenue associated with our railcar manufacturing, maintenance services, and digital and logistics services businesses, as well as certain servicing, maintenance, and management agreements, is recognized in accordance with ASC 606, Revenue from Contracts with Customers. Revenue is measured based on the allocation of the transaction price in a contract to satisfied performance obligations. The transaction price does not include any amounts collected on behalf of third parties. We recognize revenue when we satisfy a performance obligation by transferring control over a product or service to a customer. For all contracts with customers, we evaluate whether we are the principal (i.e., report revenues on a gross basis) or agent (i.e., report revenues on a net basis). Generally, we are the principal in our contracts with customers and report revenues on a gross basis as we control the product or service before it is transferred to a customer. We act as an agent for a small number of service contracts and report those revenues on a net basis as we do not control the services before they are provided to the customer. Payments for our products and services are generally due within normal commercial terms. The following is a description of principal activities from which we generate our revenue, separated by reportable segments. See Note 4 for a further discussion regarding our reportable segments. Railcar Leasing and Services Group In our Railcar Leasing and Services Group ("Leasing Group"), revenue from rentals and operating leases, including contracts that contain non-level fixed lease payments, is recognized monthly on a straight-line basis. When certain criteria are met, leases not classified as operating leases are generally classified as sales-type leases. We review our operating lease receivables for collectibility on a regular basis, taking into consideration changes in factors such as the lessee’s payment history, the financial condition of the lessee, and business and economic conditions in the industry in which the lessee operates. In the event that the collectibility of a receivable with respect to any lessee is no longer probable, we derecognize the revenue and related receivable and recognize future revenue only when the lessee makes a rental payment. Contingent rents are recognized when the contingency is resolved. Selling profit or loss associated with sales-type leases is recognized upon lease commencement, and a net investment in the sales-type lease is recorded in the Consolidated Balance Sheets. Interest income related to sales-type leases is recognized over the lease term using the effective interest method. Selling profit or loss associated with sales-type leases is presented in the gains on dispositions of other property line in our Consolidated Statements of Operations. See "Lease Accounting" below for additional information regarding sales-type leases. We report all sales of railcars from the lease fleet as a net gain or loss from the disposal of a long-term asset in accordance with ASC 610-20, Gains and losses from the derecognition of non-financial assets. Sales of railcars from the lease fleet are presented in the Lease portfolio sales line in our Consolidated Statements of Operations. Our maintenance services business is primarily dedicated to servicing our lease fleet. Revenues related to maintenance services performed on Company-owned railcars under full-service lease agreements are eliminated within the Railcar Leasing and Services Group. Services that are not included in the full-service lease agreement, such as repairs of railcar damage or other customer-specific requirements, as well as maintenance and repair activities on railcars owned by third parties, including our investor-owned fleet, are reflected in the Leasing Group's revenues and are not eliminated in consolidation. Within maintenance services, revenue is recognized over time as repair and maintenance projects are completed, using an input approach based on the costs incurred relative to the total estimated costs of performing the project. We recorded contract assets of $10.5 million and $9.6 million as of September 30, 2025 and December 31, 2024, respectively, related to unbilled revenues recognized on repair and maintenance activities that have been performed, but for which the entire project has not yet been completed, and the railcar has not yet been shipped to the customer. These contract assets are included within the Receivables, net of allowance line in our Consolidated Balance Sheets. Rail Products Group Our railcar manufacturing business recognizes revenue related to new railcars at a point in time when the customer has submitted its certificate of acceptance and legal title of the railcar has passed to the customer. Certain contracts for the sales of railcars include price adjustments based on changes to input costs; this amount represents variable consideration for which we are generally unable to estimate the final consideration until the railcar is delivered. Revenue related to sustainable railcar conversions is recognized over time as sustainable railcar conversions are completed, using an input approach based on the costs incurred relative to the total estimated costs of performing the project. Revenue related to certain support services is recognized over time based on our stand-ready obligation to provide such services. We recorded contract assets of $4.6 million and $3.4 million as of September 30, 2025 and December 31, 2024, respectively. These contract assets are included within the Receivables, net of allowance line in our Consolidated Balance Sheets. We account for shipping and handling costs as activities to fulfill the promise to transfer the good; as such, these fees are recorded in revenue. The fees and costs of shipping and handling activities are accrued when the related performance obligation has been satisfied. Unsatisfied Performance Obligations The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of September 30, 2025 and the percentage of the outstanding performance obligations as of September 30, 2025 expected to be delivered during the remainder of 2025:
| Unsatisfied performance obligations at September 30, 2025
| Total Amount |  | Percent expected to be delivered in 2025
| (in millions) |  |
Rail Products Group: |  |  |
New railcars: |  |  |
External customers | $ | 1,579.9 |  |  |
Leasing Group | 182.5 |  |  |
| $ | 1,762.4 |  |  | 21.3 | %
Railcar Leasing and Services Group: |  |  |
Leasing and management | $ | 44.1 |  |  | 10.7 | %
Maintenance services | $ | 3.4 |  |  | 100.0 | %
The remainder of the unsatisfied performance obligations for the Rail Products Group is expected to be delivered through 2028. The orders in the Rail Products Group's backlog from the Leasing Group are fully supported by lease commitments with external customers. The final amount of backlog attributable to the Leasing Group may vary by the time of delivery as customers may elect to modify their procurement decision. Unsatisfied performance obligations for the Railcar Leasing and Services Group are related to servicing, maintenance, and management agreements and are expected to be performed through 2029.
Lessor, Leases [Policy Text Block] | Lessor Our Leasing Group enters into railcar operating leases with third parties with terms generally ranging between one year and ten years. The majority of our fleet operates on full-service leases that earn fixed monthly lease payments. Generally, lease payments are due at the beginning of the applicable month. A portion of our fleet operates on per diem leases that earn usage-based variable lease payments. Some of our leases include options to extend the leases for up to five years, and a small percentage of our leases include early termination options with certain notice requirements and early termination penalties. As of September 30, 2025, non-lease fleet operating leases in which we are the lessor were not significant, and we had no direct finance leases. We manage risks associated with residual values of leased railcars by investing across a diverse portfolio of railcar types, staggering lease maturities within any given railcar type, avoiding concentration of railcar type and industry, and actively participating in secondary markets. Additionally, our lease agreements contain normal wear and tear return condition provisions and high mileage thresholds designed to protect the value of our residual assets. Our lease agreements do not contain any material residual value guarantees or restrictive covenants. The following table summarizes the impact of our leases on our Consolidated Statements of Operations:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (in millions)
Operating lease revenues | $ | 212.6 |  |  | $ | 194.5 |  |  | $ | 622.4 |  |  | $ | 582.3 |
Variable operating lease revenues | $ | 15.7 |  |  | $ | 14.7 |  |  | $ | 50.2 |  |  | $ | 49.2 |
Interest income on sales-type lease receivables | $ | 0.3 |  |  | $ | 0.2 |  |  | $ | 0.7 |  |  | $ | 0.5 |
Profit recognized at sales-type lease commencement (1) | $ | — |  |  | $ | — |  |  | $ | 1.0 |  |  | $ | — |
(1) Included in gains on dispositions of other property on our Consolidated Statements of Operations. Future contractual minimum revenues for operating leases will mature as follows (in millions)(1):
Remaining three months of 2025 | $ | 206.3 |
2026 | 733.1 |
2027 | 589.8 |
2028 | 417.4 |
2029 | 281.5 |
Thereafter | 538.1 |
Total | $ | 2,766.2 |
(1) Total contractual minimum rental revenues on operating leases relates to our wholly-owned and partially-owned subsidiaries and sub-lease rental revenues associated with the Leasing Group's operating lease obligations. Future contractual minimum lease receivables for sales-type leases will mature as follows (in millions):
Remaining three months of 2025 | $ | 0.5 |
2026 | 2.0 |
2027 | 2.0 |
2028 | 2.0 |
2029 | 2.0 |
Thereafter | 17.6 |
Total | 26.1 |
Less: Unearned interest income | (8.0) |
Net investment in sales-type leases (1) | $ | 18.1 |
(1) Included in other assets in our Consolidated Balance Sheets.
Cash and Cash Equivalents, Policy [Policy Text Block] | Financial Instruments We consider all highly liquid debt instruments to be either cash and cash equivalents if purchased with a maturity of three months or less, or short-term marketable securities if purchased with a maturity of more than three months and less than one year. Financial instruments that potentially subject us to a concentration of credit risk are primarily cash investments, including restricted cash and receivables. We place our cash investments in bank deposits, investment grade short-term debt instruments, highly-rated money market funds, and highly-rated commercial paper. We limit the amount of credit exposure to any one commercial issuer. The carrying values of cash, receivables, and accounts payable are considered to be representative of their respective fair values. Concentrations of credit risk with respect to receivables are limited due to control procedures that monitor the credit worthiness of customers, the large number of customers in our customer base, and their dispersion across different end markets and geographic areas. Receivables are generally evaluated at a portfolio level based on these characteristics. As receivables are generally unsecured, we maintain an allowance for credit losses using a forward-looking approach based on historical losses and consideration of current and expected future economic conditions. Historically, we have observed that the likelihood of loss increases when receivables have aged beyond 180 days. When a receivable is deemed uncollectible, the write-off is recorded as a reduction to the allowance for credit losses. During the nine months ended September 30, 2025, we recognized approximately $3.4 million of credit loss expense and wrote off $0.8 million related to our trade receivables that are in the scope of ASC 326, Financial Instruments – Credit Losses, bringing the allowance for credit losses balance from $14.3 million at December 31, 2024 to $16.9 million at September 30, 2025. This balance excludes the general reserve for operating lease receivables that is permitted under ASC 450, Contingencies.
Supplier Finance Program | Supply Chain Finance Program In cooperation with a participating financial institution, we facilitate a voluntary supply chain finance ("SCF") program for several of our suppliers. We negotiate payment terms with suppliers that are in line with average industry terms. We have not pledged any assets as security or provided other forms of guarantees to the financial institution. Under the SCF program, participating suppliers may choose to sell, at a discounted price, receivables due from us to the financial institution, at the sole discretion of both the suppliers and the financial institution, prior to the invoices’ scheduled due dates. The payment terms that we negotiate with all suppliers are consistent regardless of whether the supplier chooses to participate in the SCF program for a particular invoice. The SCF program is administered by a third-party financial institution, and our responsibility is limited to making payments based on the terms originally negotiated with participating suppliers, regardless of whether such suppliers sell receivables to the financial institution. Amounts due to our participating suppliers in the SCF program totaled $32.8 million and $8.2 million as of September 30, 2025 and December 31, 2024, respectively, and are included in accounts payable in our Consolidated Balance Sheets. Payments made under the SCF program are reflected in net cash provided by operating activities from continuing operations in our Consolidated Statements of Cash Flows.
New Accounting Pronouncements, Policy [Policy Text Block] | Recent Accounting Pronouncements Not Yet Adopted ASU 2023-09 – In December 2023, the FASB issued ASU No. 2023-09, "Improvements to Income Tax Disclosures," which enhances transparency and decision usefulness of income tax disclosures. ASU 2023-09 requires, on an annual basis, a tabular disclosure using specific categories in the rate reconciliation and providing additional information for reconciling items that meet a quantitative threshold, as well as the disaggregation of income taxes paid by federal, state, and foreign jurisdictions. ASU 2023-09 is effective for public companies during annual reporting periods beginning after December 15, 2024 on a prospective basis, with an option for retrospective application. We are currently evaluating the impact ASU 2023-09 will have on our income tax disclosures. ASU 2024-03 – In November 2024, the FASB issued ASU No. 2024-03, "Disaggregation of Income Statement Expenses," which improves financial reporting and responds to investor input by requiring public companies to disclose additional information about certain expenses in the notes to the consolidated financial statements. ASU 2024-03 requires disclosures, on an annual and interim basis, of the amounts of purchases of inventory, employee compensation, depreciation, and intangible asset amortization included in each relevant expense category; a qualitative description of amounts remaining that are not separately disaggregated quantitatively; and the amount of selling expenses and, in annual reporting periods, the definition of selling expenses. ASU 2024-03 is effective for public companies during annual reporting periods beginning after December 15, 2026 on a prospective basis, with an option for retrospective application. Early adoption is permitted. We are currently evaluating the impact ASU 2024-03 will have on our financial statement disclosures.

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