Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Total revenues	$ 1,187.9	$ 1,626.7
Cost of revenues:
Total cost of revenues	889.9	1,211.1
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	96.5	98.3
Gains (losses) on dispositions of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	2.1	14.9
Other	(0.2)	0.9
Total gains (losses) on disposition of property	1.9	15.8
Total operating profit	203.4	333.1
Other (income) expense:
Interest income	(1.2)	(0.5)
Interest expense	45.8	51.5
Other, net	(0.7)	(2.3)
Total other (income) expense	43.9	48.7
Income before income taxes	159.5	284.4
Provision for income taxes	57.4	95.4
Net income	102.1	189.0
Net income attributable to noncontrolling interest	4.9	8.8
Net income attributable to Trinity Industries, Inc.	$ 97.2	$ 180.2
Net income attributable to Trinity Industries, Inc. per common share:
Basic (in dollars per share)	$ 0.64	$ 1.15
Diluted (in dollars per share)	$ 0.64	$ 1.13
Weighted average number of shares outstanding:
Basic (in shares)	148.3	151.2
Diluted (in shares)	148.3	154.3
Dividends declared per common share (in dollars per share)	$ 0.11	$ 0.10
Manufacturing
Revenues:
Total revenues	$ 1,010.1	$ 1,382.5
Cost of revenues:
Total cost of revenues	793.9	1,084.5
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	61.4	61.3
Leasing
Revenues:
Total revenues	177.8	244.2
Cost of revenues:
Total cost of revenues	96.0	126.6
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	10.4	10.3
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 24.7	$ 26.7