Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Total revenues	$ 6,392.7	$ 6,170.0	$ 4,365.3
Cost of revenues:
Total cost of revenues	4,656.2	4,619.8	3,322.3
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	476.4	403.6	291.3
Gains on disposition of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	166.1	92.3	20.4
Other	12.7	12.1	0.8
Total gains on disposition of property	178.8	104.4	21.2
Total operating profit	1,438.9	1,251.0	772.9
Other (income) expense:
Interest income	(2.2)	(1.9)	(2.1)
Interest expense	194.7	193.4	187.3
Other, net	(5.6)	(4.6)	(2.8)
Total other (income) expense	186.9	186.9	182.4
Income from continuing operations before income taxes	1,252.0	1,064.1	590.5
Provision (benefit) for income taxes:
Current	309.4	360.6	158.6
Deferred	116.6	(5.8)	45.8
Total provision for income taxes	426.0	354.8	204.4
Net income from continuing operations	826.0	709.3	386.1
Discontinued operations:
Gain on sale of discontinued operations, net of provision for income taxes of $-, $-, and $5.4	0.0	0.0	7.1
Loss from discontinued operations, net of benefit for income taxes of $-, $-, and $(0.8)	0.0	0.0	(0.8)
Net income	826.0	709.3	392.4
Net income attributable to noncontrolling interest	29.5	31.1	16.9
Net income attributable to Trinity Industries, Inc.	$ 796.5	$ 678.2	$ 375.5
Basic:
Continuing operations (in dollars per share)	$ 5.14	$ 4.35	$ 2.34
Discontinued operations (in dollars per share)	0.00	0.00	0.04
Basic (in dollars per share)	5.14	4.35	2.38
Diluted:
Continuing operations (in dollars per share)	5.08	4.19	2.34
Discontinued operations (in dollars per share)	0.00	0.00	0.04
Diluted (in dollars per share)	$ 5.08	$ 4.19	$ 2.38
Weighted average number of shares outstanding:
Basic (in shares)	150.2	151.0	152.8
Diluted (in shares)	152.2	156.7	152.9
Dividends declared per common share (in dollars per share)	$ 0.430	$ 0.375	$ 0.270
Manufacturing
Revenues:
Total revenues	$ 5,301.1	$ 5,063.6	$ 3,719.9
Cost of revenues:
Total cost of revenues	4,043.9	3,975.1	2,990.9
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	271.4	235.0	180.4
Leasing
Revenues:
Total revenues	1,091.6	1,106.4	645.4
Cost of revenues:
Total cost of revenues	612.3	644.7	331.4
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	52.4	49.6	37.6
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 152.6	$ 119.0	$ 73.3