Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Total revenues	$ 1,542.2	$ 1,562.8	$ 4,845.7	$ 4,508.6
Cost of revenues:
Total cost of revenues	1,109.4	1,172.2	3,540.1	3,344.5
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	126.6	113.0	339.3	293.0
Gains on dispositions of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	57.8	3.0	102.8	90.2
Other	0.9	0.6	11.8	13.2
Total gains on disposition of property	58.7	3.6	114.6	103.4
Total operating profit	364.9	281.2	1,080.9	974.5
Other (income) expense:
Interest income	(0.6)	(0.4)	(1.6)	(1.5)
Interest expense	46.7	48.2	148.8	141.4
Other, net	(1.0)	(1.6)	(4.0)	(2.9)
Total other (income) expense	45.1	46.2	143.2	137.0
Income before income taxes	319.8	235.0	937.7	837.5
Provision for income taxes	107.6	78.1	315.7	274.5
Net income	212.2	156.9	622.0	563.0
Net income attributable to noncontrolling interest	7.9	7.5	25.5	23.0
Net income attributable to Trinity Industries, Inc.	$ 204.3	$ 149.4	$ 596.5	$ 540.0
Net income attributable to Trinity Industries, Inc. per common share:
Basic (in dollars per share)	$ 1.32	$ 0.96	$ 3.84	$ 3.46
Diluted (in dollars per share)	$ 1.31	$ 0.91	$ 3.78	$ 3.33
Weighted average number of shares outstanding:
Basic (in shares)	150.0	151.5	150.6	150.9
Diluted (in shares)	150.9	159.6	153.1	157.0
Dividends declared per common share (in dollars per share)	$ 0.11	$ 0.1	$ 0.32	$ 0.275
Manufacturing
Revenues:
Total revenues	$ 1,295.6	$ 1,359.8	$ 4,123.5	$ 3,638.0
Cost of revenues:
Total cost of revenues	976.0	1,062.6	3,162.3	2,827.5
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	71.5	64.2	202.2	169.7
Leasing
Revenues:
Total revenues	246.6	203.0	722.2	870.6
Cost of revenues:
Total cost of revenues	133.4	109.6	377.8	517.0
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	15.4	12.1	38.4	33.8
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 39.7	$ 36.7	$ 98.7	$ 89.5