Note 9. Debt Remaining Debt Principal Payments (Details) $ in Millions	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	$ 840.1
Long-Term Debt, Maturity, Year Two	1,113.5
Long-Term Debt, Maturity, Year Three	1,091.8
Long-Term Debt, Maturity, Year Four	2,028.8
Long-Term Debt, Maturity, Year Five	235.3
Long-Term Debt, Maturity, after Year Five	405.8
Long-term Debt, Gross	5,715.3
Other Equipment Financing | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	2.4
Long-Term Debt, Maturity, Year Two	2.5
Long-Term Debt, Maturity, Year Three	2.7
Long-Term Debt, Maturity, Year Four	2.8
Long-Term Debt, Maturity, Year Five	3.0
Long-Term Debt, Maturity, after Year Five	36.6
Long-term Debt, Gross	50.0
7.75% Senior Notes Due 2028 | Corporate Segment [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	0.0
Long-Term Debt, Maturity, Year Two	0.0
Long-Term Debt, Maturity, Year Three	0.0
Long-Term Debt, Maturity, Year Four	600.0
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	600.0
Secured Debt [Member] | 2010 Secured Railcar Equipment Notes [Member] | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	20.4
Long-Term Debt, Maturity, Year Two	25.5
Long-Term Debt, Maturity, Year Three	28.2
Long-Term Debt, Maturity, Year Four	23.9
Long-Term Debt, Maturity, Year Five	21.4
Long-Term Debt, Maturity, after Year Five	30.6
Long-term Debt, Gross	150.0
Secured Debt [Member] | 2018 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	14.8
Long-Term Debt, Maturity, Year Two	14.4
Long-Term Debt, Maturity, Year Three	18.1
Long-Term Debt, Maturity, Year Four	311.9
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	359.2
Secured Debt [Member] | 2019 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	35.0
Long-Term Debt, Maturity, Year Two	676.4
Long-Term Debt, Maturity, Year Three	0.0
Long-Term Debt, Maturity, Year Four	0.0
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	711.4
Secured Debt [Member] | 2020 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	10.9
Long-Term Debt, Maturity, Year Two	13.7
Long-Term Debt, Maturity, Year Three	272.2
Long-Term Debt, Maturity, Year Four	0.0
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	296.8
Secured Debt [Member] | 2021 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	29.1
Long-Term Debt, Maturity, Year Two	30.5
Long-Term Debt, Maturity, Year Three	30.1
Long-Term Debt, Maturity, Year Four	259.8
Long-Term Debt, Maturity, Year Five	18.4
Long-Term Debt, Maturity, after Year Five	338.6
Long-term Debt, Gross	706.5
Secured Debt [Member] | 2022 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	6.7
Long-Term Debt, Maturity, Year Two	8.1
Long-Term Debt, Maturity, Year Three	8.2
Long-Term Debt, Maturity, Year Four	8.2
Long-Term Debt, Maturity, Year Five	192.5
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	223.7
Secured Debt [Member] | TRP 2021 Secured Railcar Equipment Notes - RIV 2013 [Member] | Railcar Leasing and Services Group [Member] | Partially-Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	15.8
Long-Term Debt, Maturity, Year Two	17.2
Long-Term Debt, Maturity, Year Three	286.6
Long-Term Debt, Maturity, Year Four	0.0
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	319.6
Secured Debt [Member] | Triumph Secured Railcar Equipment Notes [Member] | Railcar Leasing and Services Group [Member] | Partially-Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	29.1
Long-Term Debt, Maturity, Year Two	23.3
Long-Term Debt, Maturity, Year Three	417.1
Long-Term Debt, Maturity, Year Four	0.0
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	469.5
Secured Debt [Member] | Tribute Secured Railcar Equipment Notes | Railcar Leasing and Services Group [Member] | Partially-Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	14.5
Long-Term Debt, Maturity, Year Two	273.3
Long-Term Debt, Maturity, Year Three	0.0
Long-Term Debt, Maturity, Year Four	0.0
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	287.8
Promissory Notes [Member] | 2017 Secured Railcar Equipment Notes [Domain] | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	632.8
Long-Term Debt, Maturity, Year Two	0.0
Long-Term Debt, Maturity, Year Three	0.0
Long-Term Debt, Maturity, Year Four	0.0
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	632.8
Line of Credit [Member] | TRL-2023 Term Loan | Railcar Leasing and Services Group [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	11.1
Long-Term Debt, Maturity, Year Two	11.1
Long-Term Debt, Maturity, Year Three	11.1
Long-Term Debt, Maturity, Year Four	290.1
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	323.4
Line of Credit [Member] | TILC Warehouse Facility [Member] | Railcar Leasing and Services Group [Member] | Revolving Credit Facility [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	17.5
Long-Term Debt, Maturity, Year Two	17.5
Long-Term Debt, Maturity, Year Three	17.5
Long-Term Debt, Maturity, Year Four	4.4
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	56.9
Line of Credit [Member] | TILC Warehouse Facility Termination Payments [Member] | Railcar Leasing and Services Group [Member] | Revolving Credit Facility [Member] | Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Long-Term Debt, Maturity, Year One	0.0
Long-Term Debt, Maturity, Year Two	0.0
Long-Term Debt, Maturity, Year Three	0.0
Long-Term Debt, Maturity, Year Four	527.7
Long-Term Debt, Maturity, Year Five	0.0
Long-Term Debt, Maturity, after Year Five	0.0
Long-term Debt, Gross	$ 527.7