Selected Quarterly Financial Data (Unadited) (Tables)

12 Months Ended

Dec. 31, 2011

Selected Quarterly Financial Data (Unaudited) [Abstract]

Selected Quarterly Financial Data (Unaudited)]

		september 30		september 30		september 30			september 30
	Three Months Ended
	March 31, 2011		June 30, 2011		September 30, 2011			December 31, 2011
	(in millions except per share data)
Revenues:
Manufacturing		$  514.4		$  580.1		$  643.7			$  785.5
Leasing		119.8		128.2		147.4			156.0
		634.2		708.3		791.1			941.5
Operating costs:
Costs of revenues:
Manufacturing		431.7		498.2		548.4			686.4
Leasing		60.5		63.3		78.6			87.9
Other		8.1		7.4		7.1			5.3
		500.3		568.9		634.1			779.6
Selling, engineering, and administrative expenses		50.3		47.5		53.5			57.8
Gain (loss) on disposition of property, plant, and equipment:
Net gains on lease fleet sales		1.1		0.4		1.6			13.1
Disposition of flood-damaged property, plant, and equipment		—		—		0.6			17.0
Other		0.8		3.1		(0.3	)		4.8
		1.9		3.5		1.9			34.9
Operating profit		85.5		95.4		105.4			139.0
Net income		25.6		31.6		31.6			56.9
Net income attributable to Trinity Industries, Inc.		24.2		30.0		31.9			56.1
Net income attributable to Trinity Industries, Inc. per common share – basic and diluted		$  0.30		$  0.37		$  0.40			$  0.70

	Three Months Ended
	March 31, 2010		June 30, 2010		September 30, 2010		December 31, 2010
	(in millions except per share data)
Revenues:
Manufacturing		$  332.8		$  423.5		$  417.9		$  516.8
Leasing		114.9		115.2		115.2		119.2
		447.7		538.7		533.1		636.0
Operating costs:
Costs of revenues:
Manufacturing		283.1		351.7		348.1		451.8
Leasing		64.0		61.8		59.2		59.0
Other		4.1		2.1		2.1		2.6
		351.2		415.6		409.4		513.4
Selling, engineering, and administrative expenses		48.4		45.5		48.7		43.7
Gain (loss) on disposition of property, plant, and equipment:
Net gains on lease fleet sales		1.7		0.3		2.3		2.3
Disposition of flood-damaged property, plant, and equipment		—		—		10.2		(0.5	)
Other		2.2		1.0		4.4		0.3
		3.9		1.3		16.9		2.1
Operating profit		52.0		78.9		91.9		81.0
Net income		4.3		21.1		31.5		18.5
Net income attributable to Trinity Industries, Inc.		2.0		18.4		29.7		17.3
Net income attributable to Trinity Industries, Inc. per common share – basic and diluted		$  0.02		$  0.23		$  0.37		$  0.22

Change in Accounting for Lease Fleet Sales

		Three Months			Three Months			Three Months			Three Months
	Originally Reported as Adjusted for the Change in Presentation for Lease Fleet Railcar Sales
	Three Months Ended March  31, 2011			Six Months Ended June  30, 2011			Nine Months Ended September 30, 2011
		(in millions)
Total cash provided by (required by):
Operating activity	$	(11.5	)	$	(3.2	)	$	28.6
Investing activity		(35.6	)		(58.3	)		(125.6	)
Financing activity		(46.6	)		(35.4	)		15.8
Net increase (decrease) in cash and cash equivalents	$	(93.7	)	$	(96.9	)	$	(81.2	)
	Three Months Ended March 31, 2010			Six Months Ended June 30, 2010			Nine Months Ended September 30, 2010			Year Ended December 31, 2010
		(in millions)
Total cash provided by (required by):
Operating activity	$	(16.2	)	$	6.1		$	47.5		$	163.9
Investing activity		(268.4	)		(304.0	)		(333.0	)		(308.2	)
Financing activity		(69.5	)		(103.6	)		(175.1	)		(113.5	)
Net increase (decrease) in cash and cash equivalents	$	(354.1	)	$	(401.5	)	$	(460.6	)	$	(257.8	)

As Adjusted for the Change in Accounting for Lease Fleet Railcar Sales and the Recognition of Deferred Loan Issuance Costs

		Three Months			Three Months			Three Months			Three Months
	As Adjusted for the Change in Presentation for Lease  Fleet Railcar Sales and the Recognition of Deferred Loan Issuance Costs as Financing Activities
	Three Months Ended March 31, 2011			Six Months Ended June 30, 2011			Nine Months Ended September 30, 2011
		(in millions)
Total cash provided by (required by):
Operating activity	$	(5.6	)	$	2.7		$	49.7
Investing activity		(35.6	)		(58.3	)		(125.6	)
Financing activity		(52.5	)		(41.3	)		(5.3	)
Net increase (decrease) in cash and cash equivalents..	$	(93.7	)	$	(96.9	)	$	(81.2	)
	Three Months Ended March  31, 2010			Six Months Ended June  30, 2010			Nine Months Ended September 30, 2010			Year Ended December 31, 2010
		(in millions)
Total cash provided by (required by):
Operating activity	$	(16.0	)	$	6.3		$	47.8		$	170.5
Investing activity		(268.4	)		(304.0	)		(333.0	)		(308.2	)
Financing activity		(69.7	)		(103.8	)		(175.4	)		(120.1	)
Net increase (decrease) in cash and cash equivalents..	$	(354.1	)	$	(401.5	)	$	(460.6	)	$	(257.8	)