Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 2,983.3	$ 1,977.3	$ 1,516.0
Cost of revenues:	2,456.2	1,609.6	1,161.5
Selling, engineering, and administrative expenses:	201.9	185.4	179.6
Lease portfolio sales	82.8	127.5	54.1
Gain (Loss) on Disposition of Other Assets	6.8	25.2	24.1
Gains on dispositions of property:	89.6	152.7	78.2
Restructuring activities, net	(2.2)	1.0	(3.7)
Total operating profit	417.0	334.0	256.8
Interest expense, net	265.5	207.6	191.4
Loss on extinguishment of debt	0.0	1.5	11.7
Pension plan settlement	0.0	0.0	(0.6)
Other, net	2.5	(1.6)	(0.9)
Other (income) expense:	268.0	207.5	201.6
Income from continuing operations before income taxes	149.0	126.5	55.2
Current Income Tax Expense (Benefit)	50.5	12.9	2.8
Provision (benefit) for deferred income taxes	(41.5)	14.7	13.1
Provision (benefit) for income taxes:	9.0	27.6	15.9
Income from continuing operations	140.0	98.9	39.3
Income (loss) from discontinued operations, net of provision (benefit) for income taxes of $(3.6), $(1.1), and $3.5	(13.4)	(20.3)	11.1
Gain (loss) on sale of discontinued operations, net of provision (benefit) for income taxes of $—, $(1.4), and $51.9	0.0	(5.7)	131.4
Net income	126.6	72.9	181.8
Net income (loss) attributable to noncontrolling interest	20.6	12.8	(0.2)
Net income attributable to Trinity Industries, Inc.	$ 106.0	$ 60.1	$ 182.0
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.47	$ 1.05	$ 0.39
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	(0.16)	(0.32)	1.40
Earnings Per Share, Basic, Total	1.31	0.73	1.79
Income (Loss) from Continuing Operations, Per Diluted Share	1.43	1.02	0.38
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(0.16)	(0.31)	1.37
Earnings Per Share, Diluted, Total	$ 1.27	$ 0.71	$ 1.75
Basic weighted average shares outstanding	81.2	81.9	101.5
Diluted weighted average shares outstanding	83.4	84.2	103.8
Manufacturing [Member]
Revenues	$ 2,113.3	$ 1,207.5	$ 781.4
Cost of revenues:	1,988.0	1,186.6	769.9
Selling, engineering, and administrative expenses:	35.9	34.2	32.5
Leasing [Member]
Revenues	870.0	769.8	734.6
Cost of revenues:	468.2	423.0	391.6
Selling, engineering, and administrative expenses:	56.6	54.0	50.6
Corporate and other
Selling, engineering, and administrative expenses:	$ 109.4	$ 97.2	$ 96.5