Segment Information (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Financial Information from continuing operations for segments
Revenue External	$ 796.8	$ 540.0	$ 2,151.5	$ 1,537.1
Total Revenues	796.8	540.0	2,151.5	1,537.1
Total Operating Profit (Loss)	105.4	91.9	286.3	222.8
Rail Group [Member]
Financial Information from continuing operations for segments
Revenue External	227.7	57.3	556.0	131.6
Revenues Intersegment	93.2	73.7	265.4	185.9
Total Revenues	320.9	131.0	821.4	317.5
Total Operating Profit (Loss)	18.2	3.3	42.9	(7.3)
Construction Products Group [Member]
Financial Information from continuing operations for segments
Revenue External	161.1	155.7	439.2	433.0
Revenues Intersegment	3.7	4.7	8.5	16.7
Total Revenues	164.8	160.4	447.7	449.7
Total Operating Profit (Loss)	17.8	20.3	42.2	40.7
Inland Barge Group [Member]
Financial Information from continuing operations for segments
Revenue External	143.2	98.9	398.9	295.8
Total Revenues	143.2	98.9	398.9	295.8
Total Operating Profit (Loss)	26.0	22.4	66.8	52.2
Energy Equipment Group [Member]
Financial Information from continuing operations for segments
Revenue External	107.3	103.0	335.6	304.8
Revenues Intersegment	4.3	3.6	12.2	7.2
Total Revenues	111.6	106.6	347.8	312.0
Total Operating Profit (Loss)	(1.9)	6.0	9.8	29.9
Railcar Leasing and Management Services Group [Member]
Financial Information from continuing operations for segments
Revenue External	153.1	122.1	413.3	362.9
Total Revenues	153.1	122.1	413.3	362.9
Total Operating Profit (Loss)	64.2	52.9	178.6	150.3
All Other [Member]
Financial Information from continuing operations for segments
Revenue External	4.4	3.0	8.5	9.0
Revenues Intersegment	13.6	9.4	36.9	25.5
Total Revenues	18.0	12.4	45.4	34.5
Total Operating Profit (Loss)	(0.3)	(1.3)	(0.8)	(6.0)
Corporate [Member]
Financial Information from continuing operations for segments
Total Operating Profit (Loss)	(11.5)	(9.6)	(30.6)	(28.6)
Eliminations - Lease subsidiary [Member]
Financial Information from continuing operations for segments
Revenues Intersegment	(87.9)	(69.6)	(252.8)	(173.5)
Total Revenues	(87.9)	(69.6)	(252.8)	(173.5)
Total Operating Profit (Loss)	(8.1)	(0.9)	(23.3)	(6.4)
Eliminations - Other [Member]
Financial Information from continuing operations for segments
Revenues Intersegment	(26.9)	(21.8)	(70.2)	(61.8)
Total Revenues	(26.9)	(21.8)	(70.2)	(61.8)
Total Operating Profit (Loss)	$ 1.0	$ (1.2)	$ 0.7	$ (2.0)

The net result for the period of deducting operating expenses from operating revenues.

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Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 27

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 27

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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