Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 3,079.2	$ 2,983.3	$ 1,977.3
Cost of revenues:	2,411.0	2,456.2	1,609.6
Selling, engineering, and administrative expenses:	235.7	201.9	185.4
Lease portfolio sales	57.3	82.8	127.5
Gain (Loss) on Disposition of Other Assets	6.0	6.8	25.2
Gains on dispositions of property:	63.3	89.6	152.7
Restructuring activities, net	4.3	(2.2)	1.0
Total operating profit	491.5	417.0	334.0
Interest expense, net	273.5	265.5	209.1
Other, net	(3.8)	2.5	(1.6)
Other (income) expense:	269.7	268.0	207.5
Income from continuing operations before income taxes	221.8	149.0	126.5
Current Income Tax Expense (Benefit)	72.5	50.5	12.9
Provision (benefit) for deferred income taxes	(22.1)	(41.5)	14.7
Provision (benefit) for income taxes:	50.4	9.0	27.6
Income from continuing operations	171.4	140.0	98.9
Loss from discontinued operations, net of benefit for income taxes of $4.1, $3.6, and $1.1	(14.3)	(13.4)	(20.3)
Loss on sale of discontinued operations, net of benefit for income taxes of $—, $—, and $1.4	0.0	0.0	(5.7)
Net income	157.1	126.6	72.9
Net income attributable to noncontrolling interest	18.7	20.6	12.8
Net income attributable to Trinity Industries, Inc.	$ 138.4	$ 106.0	$ 60.1
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.86	$ 1.47	$ 1.05
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	(0.17)	(0.16)	(0.32)
Earnings Per Share, Basic, Total	1.69	1.31	0.73
Income (Loss) from Continuing Operations, Per Diluted Share	1.81	1.43	1.02
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(0.17)	(0.16)	(0.31)
Earnings Per Share, Diluted, Total	$ 1.64	$ 1.27	$ 0.71
Basic weighted average shares outstanding	81.9	81.2	81.9
Diluted weighted average shares outstanding	84.2	83.4	84.2
Manufacturing [Member]
Revenues	$ 1,938.4	$ 1,943.9	$ 1,127.3
Cost of revenues:	1,748.2	1,827.5	1,083.3
Selling, engineering, and administrative expenses:	32.8	30.5	29.1
Railcar Leasing and Services Group [Member]
Revenues	1,140.8	1,039.4	850.0
Cost of revenues:	662.8	628.7	526.3
Selling, engineering, and administrative expenses:	77.0	62.0	59.1
Corporate and other
Selling, engineering, and administrative expenses:	$ 125.9	$ 109.4	$ 97.2