Derivative Instruments and Fair Value Accounting Derivative Effect on Interest (Details) - Interest Expense [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest Rate Swap, Expired, 2018 Secured Railcar Equipment Notes [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		$ 0.2		$ 0.2
Interest Rate Swap, Expired, TRIP Holdings Warehouse Loan [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net
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]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		$ 0.7		$ 0.7
Interest Rate Cap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		$ (0.1)		$ (0.1)
Interest Rate Swap, 2017 Promissory Notes
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[1]	$ (11.3)		$ (11.3)
Interest Rate Swap, TRL-2023 Term Loan
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net	Interest Income (Expense), Net
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	[1]	$ (4.2)		$ (4.2)

[1] Based on the fair value of open hedges as of September 30, 2023.