Goodwill (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Goodwill by Segment
Goodwill	$ 360.3	[1]	$ 278.2	[2]
Rail Group
Goodwill by Segment
Goodwill	134.6		134.6	[2]
Construction Products Group
Goodwill by Segment
Goodwill	126.9		126.9	[2]
Energy Equipment Group
Goodwill by Segment
Goodwill	97.0		14.9	[2]
Railcar Leasing and Management Services Group
Goodwill by Segment
Goodwill	$ 1.8		$ 1.8	[2]

[1] (unaudited)

[2] (as reported)