Goodwill (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Goodwill by Segment
Total Goodwill	$ 203.6	[1]	$ 197.6
Rail Group [Member]
Goodwill by Segment
Total Goodwill	122.5		122.5
Construction Products Group [Member]
Goodwill by Segment
Total Goodwill	68.4		62.4
Energy Equipment Group [Member]
Goodwill by Segment
Total Goodwill	10.9		10.9
Railcar Leasing and Management Services Group [Member]
Goodwill by Segment
Total Goodwill	$ 1.8		$ 1.8

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