Note 10. Employee Retirement Plans Accumulated Benefit Obligations and Funded Status (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Plan Assets, Category [Line Items]
Defined Benefit Plan, Plan Assets, Amount			$ 23.6
Trinity Industries, Inc. Consolidated Pension Plan [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Defined Benefit Plan, Plan Assets, Amount		$ 0.6
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan, Plan Assets, Category [Line Items]
Liability, Defined Benefit Plan	$ (11.2)	(14.5)
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (11.2)	$ (14.5)