Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Total revenues	$ 1,111.7	$ 1,542.2	$ 3,484.5	$ 4,845.7
Cost of revenues:
Total cost of revenues	827.3	1,109.4	2,614.9	3,540.1
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	102.3	126.6	305.5	339.3
Gains on dispositions of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	0.0	57.8	13.5	102.8
Other	1.5	0.9	1.0	11.8
Total gains (losses) on disposition of property	1.5	58.7	14.5	114.6
Total operating profit	183.6	364.9	578.6	1,080.9
Other (income) expense:
Interest income	(1.4)	(0.6)	(3.9)	(1.6)
Interest expense	45.3	46.7	136.7	148.8
Other, net	0.2	(1.0)	(5.4)	(4.0)
Total other (income) expense	44.1	45.1	127.4	143.2
Income before income taxes	139.5	319.8	451.2	937.7
Provision for income taxes	49.9	107.6	160.7	315.7
Net income	89.6	212.2	290.5	622.0
Net income attributable to noncontrolling interest	5.4	7.9	14.5	25.5
Net income attributable to Trinity Industries, Inc.	$ 84.2	$ 204.3	$ 276.0	$ 596.5
Net income attributable to Trinity Industries, Inc. per common share:
Basic (in dollars per share)	$ 0.55	$ 1.32	$ 1.81	$ 3.84
Diluted (in dollars per share)	$ 0.55	$ 1.31	$ 1.81	$ 3.78
Weighted average number of shares outstanding:
Basic (in shares)	148.7	150.0	148.3	150.6
Diluted (in shares)	148.7	150.9	148.3	153.1
Dividends declared per common share (in dollars per share)	$ 0.11	$ 0.11	$ 0.33	$ 0.32
Manufacturing
Revenues:
Total revenues	$ 938.5	$ 1,295.6	$ 2,837.4	$ 4,123.5
Cost of revenues:
Total cost of revenues	745.4	976.0	2,258.4	3,162.3
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	54.9	71.5	176.6	202.2
Leasing
Revenues:
Total revenues	173.2	246.6	647.1	722.2
Cost of revenues:
Total cost of revenues	81.9	133.4	356.5	377.8
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	11.8	15.4	33.9	38.4
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 35.6	$ 39.7	$ 95.0	$ 98.7