Note 6. Railcar Leasing and Management Services Group Leasing Debt (Details) - Railcar Leasing and Management Services Group [Member] $ in Millions	Dec. 31, 2019 USD ($)
Wholly Owned Subsidiaries [Member]
Debt Instrument [Line Items]
Net Book Value of Unpledged Equipment	$ 1,303.5
Wholly Owned Subsidiaries [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount	4,501.2
TRIP Holdings [Member] | Secured Debt [Member] | TRIP Master Funding Secured Railcar Equipment Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount	1,246.1
Trinity Rail Leasing 2012 [Member] | Secured Debt [Member] | TRL 2012 Secured Railcar Equipment Notes - RIV 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument, Collateral Amount	$ 540.6