Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Total revenues	$ 4,588.3	$ 6,392.7	$ 6,170.0
Cost of revenues:
Total cost of revenues	3,456.1	4,656.2	4,619.8
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	407.4	476.4	403.6
Gains on disposition of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	13.5	166.1	92.3
Other	3.9	12.7	12.1
Total gains on disposition of property	17.4	178.8	104.4
Total operating profit	742.2	1,438.9	1,251.0
Other (income) expense:
Interest income	(5.4)	(2.2)	(1.9)
Interest expense	181.9	194.7	193.4
Other, net	(1.1)	(5.6)	(4.6)
Total other (income) expense	175.4	186.9	186.9
Income before income taxes	566.8	1,252.0	1,064.1
Provision (benefit) for income taxes:
Current	(119.3)	309.4	360.6
Deferred	321.4	116.6	(5.8)
Total provision for income taxes	202.1	426.0	354.8
Discontinued operations:
Net income	364.7	826.0	709.3
Net income attributable to noncontrolling interest	21.1	29.5	31.1
Net income attributable to Trinity Industries, Inc.	$ 343.6	$ 796.5	$ 678.2
Basic:
Basic (in dollars per share)	$ 2.25	$ 5.14	$ 4.35
Diluted:
Diluted (in dollars per share)	$ 2.25	$ 5.08	$ 4.19
Weighted average number of shares outstanding:
Basic (in shares)	148.4	150.2	151.0
Diluted (in shares)	148.6	152.2	156.7
Dividends declared per common share (in dollars per share)	$ 0.44	$ 0.43	$ 0.375
Manufacturing
Revenues:
Total revenues	$ 3,763.4	$ 5,301.1	$ 5,063.6
Cost of revenues:
Total cost of revenues	3,019.6	4,043.9	3,975.1
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	231.0	271.4	235.0
Leasing
Revenues:
Total revenues	824.9	1,091.6	1,106.4
Cost of revenues:
Total cost of revenues	436.5	612.3	644.7
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	45.4	52.4	49.6
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 131.0	$ 152.6	$ 119.0