Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Computation of basic and diluted net income attributable to Trinity Industries, Inc.

The computation of basic and diluted net income attributable to Trinity Industries, Inc. follows.     

	Three Months Ended June 30, 2017						Three Months Ended June 30, 2016
	Income (Loss)			Average Shares	EPS		Income (Loss)			Average Shares	EPS
	(in millions, except per share amounts)
Net income attributable to Trinity Industries, Inc.	$	51.1					$	94.6
Unvested restricted share participation	(1.1		)				(2.9		)
Net income attributable to Trinity Industries, Inc. – basic	50.0			149.1	$	0.34	91.7			147.8	$	0.62
Effect of dilutive securities:
Nonparticipating unvested restricted shares and stock options	—			0.3			—			—
Convertible subordinated notes	—			1.6			—			—
Net income attributable to Trinity Industries, Inc. – diluted	$	50.0		151.0	$	0.33	$	91.7		147.8	$	0.62

	Six Months Ended June 30, 2017						Six Months Ended June 30, 2016
	Income (Loss)			Average Shares	EPS		Income (Loss)			Average Shares	EPS
	(in millions, except per share amounts)
Net income attributable to Trinity Industries, Inc.	$	97.1					$	191.8
Unvested restricted share participation	(2.3		)				(5.7		)
Net income attributable to Trinity Industries, Inc. – basic	94.8			148.9	$	0.64	186.1			148.7	$	1.25
Effect of dilutive securities:
Nonparticipating unvested restricted shares and stock options	—			0.4			—			—
Convertible subordinated notes	—			1.7			—			—
Net income attributable to Trinity Industries, Inc. – diluted	$	94.8		151.0	$	0.63	$	186.1		148.7	$	1.25