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Derivative Instruments and Fair Value Accounting Derivative Effect on Interest (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net |  | $ 0.0 |  |  | $ 0.0 |  |
Interest Rate Swap, Expired, Tribute Rail Secured Railcar Equipment Notes |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net |  | 0.0 |  |  | 0.0 |  |
Interest Rate Cap [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net |  | 0.0 |  |  | 0.0 |  |
Interest Rate Swap, 2017 Promissory Notes - Expired [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net |  | (2.3) |  |  | (2.3) |  |
Interest Rate Swap, TRL-2023 Term Loan - Expired [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net |  | 1.2 |  |  | 1.2 |  |
Forward Interest Rate Swap, TILC - Expired [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net |  | 1.2 |  |  | 1.2 |  |
Interest Rate Swap, TRL-2023 Term Loan - Open |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net | [1] | $ (3.0) |  |  | $ (3.0) |  |
Interest Expense [Member] | Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating
Interest Expense [Member] | Interest Rate Swap, Expired, Tribute Rail Secured Railcar Equipment Notes |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating
Interest Expense [Member] | Interest Rate Cap [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating
Interest Expense [Member] | Interest Rate Swap, 2017 Promissory Notes - Expired [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating
Interest Expense [Member] | Interest Rate Swap, TRL-2023 Term Loan - Expired [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating
Interest Expense [Member] | Forward Interest Rate Swap, TILC - Expired [Member] |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating | Interest Income (Expense), Operating |  | Interest Income (Expense), Operating
Interest Expense [Member] | Interest Rate Swap, TRL-2023 Term Loan - Open |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest Income (Expense), Operating | [2] | Interest Income (Expense), Operating | Interest Income (Expense), Operating | [2] | Interest Income (Expense), Operating
[1] | Based on the fair value of open hedges as of June 30, 2025
[2] | Includes changes in fair value related to the amortization of the initial off-market fair value.

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