Consolidated Statements of Operations (unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Total revenues	$ 1,626.7	$ 1,460.5
Cost of revenues:
Total cost of revenues	1,211.1	1,074.0
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	98.3	83.6
Gains on disposition of property, plant, and equipment:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	14.9	77.5
Other	0.9	10.9
Total gains on disposition of property, plant, and equipment	15.8	88.4
Total operating profit	333.1	391.3
Other (income) expense:
Interest income	(0.5)	(0.4)
Interest expense	51.5	46.3
Other, net	(2.3)	(0.1)
Total other (income) expense	48.7	45.8
Income before income taxes	284.4	345.5
Provision for income taxes	95.4	112.5
Net income	189.0	233.0
Net income attributable to noncontrolling interest	8.8	6.6
Net income attributable to Trinity Industries, Inc.	180.2	226.4
Net income attributable to Trinity Industries, Inc. per common share:
Basic (in dollars per share)	$ 1.15	$ 1.46
Diluted (in dollars per share)	$ 1.13	$ 1.42
Weighted average number of shares outstanding:
Basic (in shares)	151.2	150.2
Diluted (in shares)	154.3	154.0
Dividends declared per common share (in dollars per share)	$ 0.10	$ 0.075
Manufacturing
Revenues:
Total revenues	1,382.5	1,018.3
Cost of revenues:
Total cost of revenues	1,084.5	794.7
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	61.3	49.5
Leasing
Revenues:
Total revenues	244.2	442.2
Cost of revenues:
Total cost of revenues	126.6	279.3
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	10.3	11.0
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 26.7	$ 23.1