Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Manufacturing	$ 783.2	$ 514.4
Leasing	142.1	119.8
Total Revenues	925.3	634.2
Cost of revenues:
Manufacturing	672.0	431.7
Leasing	73.4	60.5
Other	11.1	8.1
Total cost of revenues	756.5	500.3
Selling, engineering, and administrative expenses:
Manufacturing	36.5	34.0
Leasing	6.1	5.7
Other	11.3	10.6
Total selling, engineering, and administrative expenses	53.9	50.3
Gain on disposition of property, plant, and equipment:
Net gains on railcar lease fleet sales	3.7	1.1
Other	3.8	0.8
Total operating profit	122.4	85.5
Other (income) expense:
Interest income	(0.4)	(0.3)
Interest expense	47.9	44.5
Other, net	(3.0)	(0.5)
Nonoperating (income) expense, total	44.5	43.7
Income before income taxes	77.9	41.8
Provision for income taxes	25.6	16.2
Net income	52.3	25.6
Net income (loss) attributable to noncontrolling interest	(0.6)	1.4
Net income attributable to Trinity Industries, Inc.	$ 52.9	$ 24.2
Net income attributable to Trinity Industries, Inc. per common share:
Basic	$ 0.66	$ 0.30
Diluted	$ 0.66	$ 0.30
Weighted average number of shares outstanding:
Basic	77.8	77.1
Diluted	78.1	77.4
Dividends declared per common share	$ 0.09	$ 0.08