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Derivative Instruments and Fair Value Accounting Derivative Instruments (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | --- | --- | ---
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | $ 1,253.4 | $ 1,249.0 | $ 1,250.4 | $ 1,269.6 | $ 1,261.1 | $ 1,256.2 | $ 1,295.6 | $ 1,296.8
Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | $ 249.3 |  |  |  |  |  |  |
Derivative, Average Fixed Interest Rate | [1] | 4.41% |  |  |  |  |  |  |
Derivative Asset |  | $ 0.0 |  |  |  |  |  |  |
Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | $ 788.5 |  |  |  |  |  |  |
Derivative, Average Fixed Interest Rate | [1] | 3.60% |  |  |  |  |  |  |
Derivative Asset |  | $ 0.0 |  |  |  |  |  |  |
Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, Tribute Rail Secured Railcar Equipment Notes |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | $ 256.0 |  |  |  |  |  |  |
Derivative, Average Fixed Interest Rate | [1] | 2.86% |  |  |  |  |  |  |
Derivative Asset |  | $ 0.0 |  |  |  |  |  |  |
Designated as Hedging Instrument [Member] | Interest Rate Cap [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | $ 169.3 |  |  |  |  |  |  |
Derivative, Cap Interest Rate |  | 3.00% |  |  |  |  |  |  |
Derivative Asset |  | $ 0.0 |  |  |  |  |  |  |
Designated as Hedging Instrument [Member] | Interest Rate Swap, 2017 Promissory Notes |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  | $ 414.7 |  |  |  |  |  |  |
Derivative, Average Fixed Interest Rate | [1] | 2.31% |  |  |  |  |  |  |
Derivative Asset |  | $ 20.2 |  |  |  |  |  |  |
Designated as Hedging Instrument [Member] | Interest Rate Swap, TRL-2023 Term Loan |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | [2] | $ 269.8 |  |  |  |  |  |  |
Derivative, Average Fixed Interest Rate | [1] | 3.79% |  |  |  |  |  |  |
Derivative Asset |  | $ 5.9 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | 0.3 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | [3] | 0.0 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, Tribute Rail Secured Railcar Equipment Notes |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | 0.5 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Cap [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | (0.2) |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, 2017 Promissory Notes |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | (19.6) |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, TRL-2023 Term Loan |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | (5.7) |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | 0.0 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest | [3] | 0.0 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, Expired, Tribute Rail Secured Railcar Equipment Notes |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | 0.7 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Cap [Member] |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | 0.0 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, 2017 Promissory Notes |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | 0.0 |  |  |  |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap, TRL-2023 Term Loan |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest |  | $ 0.0 |  |  |  |  |  |  |
[1] | Weighted average fixed interest rate, except for the interest rate cap on the 2017 promissory notes
[2] | In June 2023, Trinity Rail Leasing 2023 LLC (“TRL-2023”), a limited purpose, indirect wholly-owned subsidiary of the Company owned through Trinity Industries Leasing Company ("TILC"), executed and designated a new interest rate swap derivative as a cash flow hedge to fix the Secured Overnight Financing Rate ("SOFR") component of the interest rate on a portion of the outstanding TRL-2023 term loan agreement ("TRL-2023 term loan").
[3] | As of March 31, 2023, all amounts previously recorded in AOCI related to this hedge have been fully amortized.

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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