Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Total revenues	$ 1,066.1	$ 995.5	$ 1,999.0	$ 1,891.7
Cost of revenues:
Total cost of revenues	812.2	792.3	1,523.3	1,522.5
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	71.5	53.0	140.5	103.7
Gains (losses) on disposition of property, plant, and equipment:
Net gains on railcar lease fleet sales	1.2	1.6	8.0	5.3
Other	(0.2)	0.7	(0.3)	4.4
Total gains (losses) on disposition of property, plant, and equipment	1.0	2.3	7.7	9.7
Total operating profit	183.4	152.5	342.9	275.2
Other (income) expense:
Interest income	(0.4)	(0.4)	(0.8)	(0.8)
Interest expense	46.5	47.9	95.7	95.8
Other, net	0.9	(0.1)	(1.8)	(3.0)
Other (income) expense, total	47.0	47.4	93.1	92.0
Income from continuing operations before income taxes	136.4	105.1	249.8	183.2
Provision for income taxes	47.2	39.0	88.4	64.7
Net income from continuing operations	89.2	66.1	161.4	118.5
Discontinued operations:
Gain on sale of discontinued operations, net of provision for income taxes of $-, $-, $5.4 and $-	0.1	0	7.1	0
Income (loss) from discontinued operations, net of provision (benefit) for income taxes of $(0.5), $0.9, $(0.8) and $0.8	(1.1)	1.4	(1.5)	1.3
Net income	88.2	67.5	167.0	119.8
Net income (loss) attributable to noncontrolling interest	4.2	(0.3)	3.9	(0.9)
Net income attributable to Trinity Industries, Inc.	84.0	67.8	163.1	120.7
Net income attributable to Trinity Industries, Inc. per common share:
Basic, Continuing operations (in dollars per share)	$ 1.07	$ 0.82	$ 1.98	$ 1.49
Basic, Discontinued operations (in dollars per share)	$ (0.01)	$ 0.02	$ 0.07	$ 0.01
Basic (in dollars per share)	$ 1.06	$ 0.84	$ 2.05	$ 1.50
Diluted, Continuing operations (in dollars per share)	$ 1.07	$ 0.82	$ 1.98	$ 1.49
Diluted, Discontinued operations (in dollars per share)	$ (0.01)	$ 0.02	$ 0.07	$ 0.01
Diluted (in dollars per share)	$ 1.06	$ 0.84	$ 2.05	$ 1.50
Weighted average number of shares outstanding:
Basic (in shares)	77.0	77.7	77.0	77.7
Diluted (in shares)	77.1	77.9	77.1	77.9
Dividends declared per common share (in dollars per share)	$ 0.13	$ 0.11	$ 0.24	$ 0.20
Manufacturing
Revenues:
Total revenues	896.5	803.2	1,695.0	1,557.3
Cost of revenues:
Total cost of revenues	726.0	680.2	1,367.2	1,337.0
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	47.1	36.1	89.8	69.4
Leasing
Revenues:
Total revenues	169.6	192.3	304.0	334.4
Cost of revenues:
Total cost of revenues	86.2	112.1	156.1	185.5
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	8.9	7.3	18.6	13.4
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 15.5	$ 9.6	$ 32.1	$ 20.9