Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 1,977.3	$ 1,516.0	$ 1,749.7
Cost of revenues:	1,609.6	1,161.5	1,327.4
Selling, engineering, and administrative expenses:	185.4	179.6	189.6
Lease portfolio sales	127.5	54.1	17.3
Gain (Loss) on Disposition of Other Assets	25.2	24.1	2.7
Gains on dispositions of property:	152.7	78.2	20.0
Impairment of long-lived assets	0.0	0.0	396.4
Restructuring activities, net	1.0	(3.7)	10.9
Total operating profit (loss)	334.0	256.8	(154.6)
Interest expense, net	207.6	191.4	211.0
Loss on extinguishment of debt	1.5	11.7	5.0
Pension plan settlement	0.0	(0.6)	151.5
Other, net	(1.6)	(0.9)	2.5
Other (income) expense:	207.5	201.6	370.0
Income (loss) from continuing operations before income taxes	126.5	55.2	(524.6)
Current Income Tax Expense (Benefit)	12.9	2.8	(512.6)
Provision (benefit) for deferred income taxes	14.7	13.1	238.5
Provision (benefit) for income taxes:	27.6	15.9	(274.1)
Income (loss) from continuing operations	98.9	39.3	(250.5)
Income (loss) from discontinued operations, net of provision (benefit) for income taxes of $(1.1), $3.5, and $5.5	(20.3)	11.1	24.3
Gain (loss) on sale of discontinued operations, net of provision (benefit) for income taxes of $(1.4), $51.9, and $—	(5.7)	131.4	0.0
Net income (loss)	72.9	181.8	(226.2)
Net income (loss) attributable to noncontrolling interest	12.8	(0.2)	(78.9)
Net income (loss) attributable to Trinity Industries, Inc.	$ 60.1	$ 182.0	$ (147.3)
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.05	$ 0.39	$ (1.48)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	(0.32)	1.40	0.21
Earnings Per Share, Basic, Total	0.73	1.79	(1.27)
Income (Loss) from Continuing Operations, Per Diluted Share	1.02	0.38	(1.48)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	(0.31)	1.37	0.21
Earnings Per Share, Diluted, Total	$ 0.71	$ 1.75	$ (1.27)
Basic weighted average shares outstanding	81.9	101.5	115.9
Diluted weighted average shares outstanding	84.2	103.8	115.9
Manufacturing [Member]
Revenues	$ 1,207.5	$ 781.4	$ 948.2
Cost of revenues:	1,186.6	769.9	910.0
Selling, engineering, and administrative expenses:	34.2	32.5	38.6
Leasing [Member]
Revenues	769.8	734.6	801.5
Cost of revenues:	423.0	391.6	417.4
Selling, engineering, and administrative expenses:	54.0	50.6	51.3
Product and Service, Other
Selling, engineering, and administrative expenses:	$ 97.2	$ 96.5	$ 99.7