Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2012

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. is as follows:

	Three Months Ended September 30, 2012						Three Months Ended September 30, 2011
	(in millions, except per share amounts)
	Income (Loss)			Average Shares	EPS		Income (Loss)			Average Shares	EPS
Net income attributable to Trinity Industries, Inc.	$	63.2					$	31.9
Unvested restricted share participation	(2.1		)				(1.0		)
Net income attributable to Trinity Industries, Inc. – basic	61.1			76.5	$	0.80	30.9			77.7	$	0.40
Effect of dilutive securities:
Stock options	—			0.2			—			0.2
Net income attributable to Trinity Industries, Inc. – diluted	$	61.1		76.7	$	0.80	$	30.9		77.9	$	0.40

	Nine Months Ended September 30, 2012						Nine Months Ended September 30, 2011
	(in millions, except per share amounts)
	Income (Loss)			Average Shares	EPS		Income (Loss)			Average Shares	EPS
Net income attributable to Trinity Industries, Inc.	$	183.9					$	86.1
Unvested restricted share participation	(6.1		)				(2.9		)
Net income attributable to Trinity Industries, Inc. – basic	177.8			77.3	$	2.30	83.2			77.4	$	1.07
Effect of dilutive securities:
Stock options	—			0.2			—			0.3
Net income attributable to Trinity Industries, Inc. – diluted	$	177.8		77.5	$	2.29	$	83.2		77.7	$	1.07