Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Total revenues	$ 6,170.0	$ 4,365.3	$ 3,811.9
Cost of revenues:
Total cost of revenues	4,619.8	3,322.3	3,051.5
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	403.6	291.3	224.1
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	92.3	20.4	33.5
Other	12.1	0.8	5.0
Total gains on disposition of property, plant, and equipment	104.4	21.2	38.5
Total operating profit	1,251.0	772.9	574.8
Other (income) expense:
Interest income	(1.9)	(2.1)	(1.5)
Interest expense	193.4	187.3	194.7
Other, net	(4.6)	(2.8)	(4.3)
Total other (income) expense	186.9	182.4	188.9
Income from continuing operations before income taxes	1,064.1	590.5	385.9
Provision (benefit) for income taxes:
Current	360.6	158.6	7.7
Deferred	(5.8)	45.8	126.3
Total provision for income taxes	354.8	204.4	134.0
Net income from continuing operations	709.3	386.1	251.9
Discontinued operations:
Gain on sale of discontinued operations, net of provision for income taxes of $-, $5.4, and $-	0	7.1	0
Income (loss) from discontinued operations, net of provision (benefit) for income taxes of $-, $(0.8), and $1.1	0	(0.8)	1.8
Net income	709.3	392.4	253.7
Net income (loss) attributable to noncontrolling interest	31.1	16.9	(1.5)
Net income attributable to Trinity Industries, Inc.	678.2	375.5	255.2
Basic:
Continuing operations (in dollars per share)	$ 4.35	$ 2.34	$ 1.59
Discontinued operations (in dollars per share)	$ 0.00	$ 0.04	$ 0.01
Basic (in dollars per share)	$ 4.35	$ 2.38	$ 1.60
Diluted:
Continuing operations (in dollars per share)	$ 4.19	$ 2.34	$ 1.58
Discontinued operations (in dollars per share)	$ 0.00	$ 0.04	$ 0.01
Diluted (in dollars per share)	$ 4.19	$ 2.38	$ 1.59
Weighted average number of shares outstanding:
Basic (in shares)	151.0	152.8	154.7
Diluted (in shares)	156.7	152.9	155.1
Dividends declared per common share (in dollars per share)	$ 0.375	$ 0.27	$ 0.21
Manufacturing
Revenues:
Total revenues	5,063.6	3,719.9	3,167.5
Cost of revenues:
Total cost of revenues	3,975.1	2,990.9	2,701.2
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	235.0	180.4	143.4
Leasing
Revenues:
Total revenues	1,106.4	645.4	644.4
Cost of revenues:
Total cost of revenues	644.7	331.4	350.3
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	49.6	37.6	29.4
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 119.0	$ 73.3	$ 51.3