Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Total revenues	$ 1,676.8	$ 1,485.3	$ 3,303.5	$ 2,945.8
Cost of revenues:
Total cost of revenues	1,219.6	1,098.3	2,430.7	2,172.3
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	114.4	96.4	212.7	180.0
Gains on dispositions of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	30.1	9.7	45.0	87.2
Other	10.0	1.7	10.9	12.6
Total gains on disposition of property, plant, and equipment	40.1	11.4	55.9	99.8
Total operating profit	382.9	302.0	716.0	693.3
Other (income) expense:
Interest income	(0.5)	(0.7)	(1.0)	(1.1)
Interest expense	50.6	46.9	102.1	93.2
Other, net	(0.7)	(1.2)	(3.0)	(1.3)
Total other (income) expense	49.4	45.0	98.1	90.8
Income before income taxes	333.5	257.0	617.9	602.5
Provision for income taxes	112.7	83.9	208.1	196.4
Net income	220.8	173.1	409.8	406.1
Net income attributable to noncontrolling interest	8.8	8.9	17.6	15.5
Net income attributable to Trinity Industries, Inc.	$ 212.0	$ 164.2	$ 392.2	$ 390.6
Net income attributable to Trinity Industries, Inc. per common share:
Basic (in dollars per share)	$ 1.36	$ 1.05	$ 2.52	$ 2.51
Diluted (in dollars per share)	$ 1.33	$ 1.01	$ 2.46	$ 2.43
Weighted average number of shares outstanding:
Basic (in shares)	150.7	151.0	151.0	150.5
Diluted (in shares)	154.2	157.4	154.3	155.6
Dividends declared per common share (in dollars per share)	$ 0.11	$ 0.1	$ 0.21	$ 0.175
Manufacturing
Revenues:
Total revenues	$ 1,445.4	$ 1,259.9	$ 2,827.9	$ 2,278.2
Cost of revenues:
Total cost of revenues	1,101.8	970.2	2,186.3	1,764.9
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	69.4	56.0	130.7	105.5
Leasing
Revenues:
Total revenues	231.4	225.4	475.6	667.6
Cost of revenues:
Total cost of revenues	117.8	128.1	244.4	407.4
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	12.7	10.7	23.0	21.7
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 32.3	$ 29.7	$ 59.0	$ 52.8