Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$ 253.7	$ 145.7	$ 75.4
Unrealized loss on derivative financial instruments:
Unrealized gain (loss) arising during the period, net of tax expense (benefit) of $4.2, $(1.9), and $(10.4)	7.2	(3.9)	(18.5)
Reclassification adjustments for losses included in net income, net of tax expense of $3.2, $2.3, and $1.3	5.8	4.1	2.1
Currency translation adjustment – reclassification adjustment for loss included in net income, net of tax expense of $0.4, $0.0, and $0.0	0.6	0	0
Net actuarial gains (losses) of defined benefit plans:
Unrealized gain (loss) arising during the period, net of tax expense (benefit) of $(17.8), $(17.5), and $4.4	(30.3)	(29.8)	7.5
Amortization of net actuarial loss, net of tax expense of $1.1, $0.6, and $0.8	2.2	1.2	1.2
Other, net of tax benefit of $-, $-, and $0.7	0	0	1.1
Other comprehensive income (loss), net of tax	(14.5)	(28.4)	(6.6)
Comprehensive income	239.2	117.3	68.8
Less: comprehensive income (loss) attributable to noncontrolling interest	0.1	3.6	(1.1)
Comprehensive income attributable to Trinity Industries, Inc.	$ 239.1	$ 113.7	$ 69.9