Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Financial Information from continuing operations for segments
Revenues - External	$ 1,066.1	$ 995.5	$ 1,999.0	$ 1,891.7
Revenues - Intersegment	0	0	0	0
Total revenues	1,066.1	995.5	1,999.0	1,891.7
Operating Profit (Loss)	183.4	152.5	342.9	275.2
Rail Group
Financial Information from continuing operations for segments
Revenues - External	474.1	380.2	897.7	721.4
Revenues - Intersegment	193.9	136.7	395.8	262.6
Total revenues	668.0	516.9	1,293.5	984.0
Operating Profit (Loss)	107.9	53.0	210.8	93.1
Construction Products Group
Financial Information from continuing operations for segments
Revenues - External	149.3	118.7	247.3	239.2
Revenues - Intersegment	5.2	5.2	11.0	10.6
Total revenues	154.5	123.9	258.3	249.8
Operating Profit (Loss)	19.0	12.8	26.7	23.9
Inland Barge Group
Financial Information from continuing operations for segments
Revenues - External	150.0	173.9	297.4	343.3
Revenues - Intersegment	0	0	0	0
Total revenues	150.0	173.9	297.4	343.3
Operating Profit (Loss)	20.9	36.6	45.2	66.6
Energy Equipment Group
Financial Information from continuing operations for segments
Revenues - External	121.4	126.6	249.9	246.7
Revenues - Intersegment	31.1	4.1	57.3	9.0
Total revenues	152.5	130.7	307.2	255.7
Operating Profit (Loss)	14.3	4.0	29.2	0.2
Railcar Leasing and Management Services Group
Financial Information from continuing operations for segments
Revenues - External	169.6	192.3	304.0	334.4
Revenues - Intersegment	0	1.9	0	2.1
Total revenues	169.6	194.2	304.0	336.5
Operating Profit (Loss)	75.7	76.4	137.3	142.9
All Other
Financial Information from continuing operations for segments
Revenues - External	1.7	3.8	2.7	6.7
Revenues - Intersegment	20.0	17.0	38.3	29.8
Total revenues	21.7	20.8	41.0	36.5
Operating Profit (Loss)	(3.8)	(6.3)	(6.4)	(5.1)
Corporate
Financial Information from continuing operations for segments
Revenues - External	0	0	0	0
Revenues - Intersegment	0	0	0	0
Total revenues	0	0	0	0
Operating Profit (Loss)	(15.5)	(9.6)	(32.1)	(21.2)
Eliminations – Lease subsidiary
Financial Information from continuing operations for segments
Revenues - External	0	0	0	0
Revenues - Intersegment	(189.5)	(132.3)	(387.5)	(254.9)
Total revenues	(189.5)	(132.3)	(387.5)	(254.9)
Operating Profit (Loss)	(34.7)	(12.2)	(67.1)	(23.1)
Eliminations – Other
Financial Information from continuing operations for segments
Revenues - External	0	0	0	0
Revenues - Intersegment	(60.7)	(32.6)	(114.9)	(59.2)
Total revenues	(60.7)	(32.6)	(114.9)	(59.2)
Operating Profit (Loss)	$ (0.4)	$ (2.2)	$ (0.7)	$ (2.1)