Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Data

	Three Months Ended
	March 31, 2015		June 30, 2015		September 30, 2015		December 31, 2015
	(in millions except per share data)
Revenues:
Manufacturing	$	1,382.5	$	1,445.4	$	1,295.6	$	1,177.6
Leasing	244.2		231.4		246.6		369.4
	1,626.7		1,676.8		1,542.2		1,547.0
Operating costs:
Costs of revenues:
Manufacturing	1,084.5		1,101.8		976.0		881.6
Leasing	126.6		117.8		133.4		234.5
	1,211.1		1,219.6		1,109.4		1,116.1
Selling, engineering, and administrative expenses	98.3		114.4		126.6		137.1
Gains on disposition of property	15.8		40.1		58.7		64.2
Operating profit	333.1		382.9		364.9		358.0
Net income	189.0		220.8		212.2		204.0
Net income attributable to Trinity Industries, Inc.	180.2		212.0		204.3		200.0
Net income attributable to Trinity Industries, Inc. per common share:
Basic	$	1.15	$	1.36	$	1.32	$	1.30
Diluted	$	1.13	$	1.33	$	1.31	$	1.30

	Three Months Ended
	March 31, 2014		June 30, 2014		September 30, 2014		December 31, 2014
	(in millions except per share data)
Revenues:
Manufacturing	$	1,018.3	$	1,259.9	$	1,359.8	$	1,425.6
Leasing	442.2		225.4		203.0		235.8
	1,460.5		1,485.3		1,562.8		1,661.4
Operating costs:
Costs of revenues:
Manufacturing	794.7		970.2		1,062.6		1,147.6
Leasing	279.3		128.1		109.6		127.7
	1,074.0		1,098.3		1,172.2		1,275.3
Selling, engineering, and administrative expenses	83.6		96.4		113.0		110.6
Gains on disposition of property	88.4		11.4		3.6		1.0
Operating profit	391.3		302.0		281.2		276.5
Net income	233.0		173.1		156.9		146.3
Net income attributable to Trinity Industries, Inc.	226.4		164.2		149.4		138.2
Net income attributable to Trinity Industries, Inc. per common share:
Basic	$	1.46	$	1.05	$	0.95	$	0.89
Diluted	$	1.42	$	1.01	$	0.90	$	0.86