Net Income Attributable to Trinity industries, Inc. Per Common Share (Tables)

9 Months Ended

Sep. 30, 2011

Net Income Attributable to Trinity Industries, Inc. Per Common Share [Abstract]

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

	Three Months Ended							Three Months Ended
	September 30, 2011							September 30, 2010
	(in millions, except per share amounts)
	Income (Loss)			Average Shares		EPS		Income (Loss)			Average Shares		EPS
Net income attributable to Trinity Industries, Inc.	$	31.9						$	29.7
Unvested restricted share participation		(1.0	)						(1.0	)
Net income attributable to Trinity Industries, Inc. — basic		30.9			77.7	$	0.40		28.7			77.0	$	0.37
Effect of dilutive securities:
Stock options		—			0.2				—			0.1
Net income attributable to Trinity Industries, Inc. — diluted	$	30.9			77.9	$	0.40	$	28.7			77.1	$	0.37

	Nine Months Ended							Nine Months Ended
	September 30, 2011							September 30, 2010
	(in millions, except per share amounts)
	Income (Loss)			Average Shares		EPS		Income (Loss)			Average Shares		EPS
Net income attributable to Trinity Industries, Inc.	$	86.1						$	50.1
Unvested restricted share participation		(2.9	)						(1.7	)
Net income attributable to Trinity Industries, Inc. — basic		83.2			77.4	$	1.07		48.4			76.8	$	0.63
Effect of dilutive securities:
Stock options		—			0.3				—			0.1
Net income attributable to Trinity Industries, Inc. — diluted	$	83.2			77.7	$	1.07	$	48.4			76.9	$	0.63