Goodwill (Details) - USD ($) $ in Millions	Jun. 30, 2015		Dec. 31, 2014	[2]
Goodwill by Segment
Goodwill	$ 754.2	[1]	$ 773.2
Rail Group
Goodwill by Segment
Goodwill	134.6		134.6
Construction Products Group
Goodwill by Segment
Goodwill	111.0		128.3
Energy Equipment Group
Goodwill by Segment
Goodwill	506.8		508.5
Railcar Leasing and Management Services Group
Goodwill by Segment
Goodwill	$ 1.8		$ 1.8

[1] (unaudited)

[2] (as reported)