Consolidated Statements of Operations (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Total revenues	$ 831.3	$ 877.3
Cost of revenues:
Total cost of revenues	630.1	660.2
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	104.9	102.5
Gains on dispositions of property:
Net gains on railcar lease fleet sales owned more than one year at the time of sale	2.1	0.0
Other	0.2	1.3
Total gains (losses) on disposition of property	2.3	1.3
Total operating profit	98.6	115.9
Other (income) expense:
Interest income	(3.9)	(1.7)
Interest expense	46.3	45.0
Other, net	(0.2)	0.1
Total other (income) expense	42.2	43.4
Income before income taxes	56.4	72.5
Provision for income taxes	14.8	20.8
Net income	41.6	51.7
Net income attributable to noncontrolling interest	1.4	5.7
Net income attributable to Trinity Industries, Inc.	$ 40.2	$ 46.0
Net income attributable to Trinity Industries, Inc. per common share:
Basic (in dollars per share)	$ 0.27	$ 0.30
Diluted (in dollars per share)	$ 0.26	$ 0.30
Weighted average number of shares outstanding:
Basic (in shares)	147.4	148.7
Diluted (in shares)	153.7	150.6
Dividends declared per common share (in dollars per share)	$ 0.13	$ 0.11
Manufacturing
Revenues:
Total revenues	$ 657.0	$ 698.7
Cost of revenues:
Total cost of revenues	536.7	576.6
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	53.2	56.6
Leasing
Revenues:
Total revenues	174.3	178.6
Cost of revenues:
Total cost of revenues	93.4	83.6
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	12.2	10.8
Other
Selling, engineering, and administrative expenses:
Total selling, engineering, and administrative expenses	$ 39.5	$ 35.1