Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income	$ 173.1	$ 88.2	$ 406.1	$ 167.0
Derivative financial instruments:
Unrealized gains/(losses) arising during the period, net of tax expense/(benefit) of $(0.1), $(0.1), $0.3 and $0.4	(0.6)	1.5	(1.8)	0.8
Reclassification adjustments for losses included in net income, net of tax benefit of $1.9, $2.0, $3.9 and $4.8	4.2	4.7	8.5	9.3
Defined benefit plans:
Amortization of net actuarial losses, net of tax benefit of $0.1, $0.5, $0.2 and $1.0	0.2	0.8	0.4	1.5
Other comprehensive income (loss), net of tax	3.8	7.0	7.1	11.6
Comprehensive income	176.9	95.2	413.2	178.6
Less: comprehensive income attributable to noncontrolling interest	9.5	5.9	16.8	6.3
Comprehensive income attributable to Trinity Industries, Inc.	$ 167.4	$ 89.3	$ 396.4	$ 172.3