Note 8. Debt Remaining Debt Principal Payments (Details) $ in Millions	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 242.1
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	655.9
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	1,487.4
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	1,105.1
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	1,292.7
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	862.4
Long-term Debt, Gross	5,645.6
Corporate Segment [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	400.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	225.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	625.0
Secured Debt [Member] | 2009 Secured Railcar Equipment Notes [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	14.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	14.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	19.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	18.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	17.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	31.5
Long-term Debt, Gross	115.8
Secured Debt [Member] | 2010 Secured Railcar Equipment Notes [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	34.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	18.4
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	20.6
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	25.7
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	28.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	76.6
Long-term Debt, Gross	204.1
Secured Debt [Member] | 2018 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	20.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	19.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	14.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	14.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	18.2
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	312.0
Long-term Debt, Gross	399.0
Secured Debt [Member] | 2019 Secured Railcar Equipment Notes [Domain] [Domain] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	34.9
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	36.6
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	35.2
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	679.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	786.2
Secured Debt [Member] | 2020 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	18.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	14.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	11.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	14.1
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	272.4
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	330.4
Secured Debt [Member] | 2021 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	12.2
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	13.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	12.6
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	14.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	14.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	241.6
Long-term Debt, Gross	307.7
Secured Debt [Member] | 2022 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	8.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	9.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	6.7
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	8.1
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	8.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	200.7
Long-term Debt, Gross	241.1
Secured Debt [Member] | TRL 2012 Secured Railcar Equipment Notes - RIV 2013 [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	10.9
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	15.6
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	15.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	17.2
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	287.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	347.0
Secured Debt [Member] | TRIP Master Funding Secured Railcar Equipment Notes [Member] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	16.2
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	32.6
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	29.5
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	23.6
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	421.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	523.2
Secured Debt [Member] | Tribute Secured Railcar Equipment Notes | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	3.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	13.9
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	15.1
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	289.9
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	322.7
Promissory Notes [Member] | 2017 Secured Railcar Equipment Notes [Member] [Domain] | Railcar Leasing and Management Services Group [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	44.4
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	44.4
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	632.8
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	721.6
Line of Credit [Member] | TILC Warehouse Facility [Member] | Railcar Leasing and Management Services Group [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	24.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	24.3
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	6.1
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	54.7
Line of Credit [Member] | TILC Warehouse Facility Termination Payments [Member] | Railcar Leasing and Management Services Group [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three	667.1
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five	0.0
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal after Year Five	0.0
Long-term Debt, Gross	$ 667.1