Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2015		Dec. 31, 2014	[2]
Goodwill [Line Items]
Goodwill	$ 754.3	[1]	$ 773.2
Rail Group
Goodwill [Line Items]
Goodwill	134.6		134.6
Construction Products Group
Goodwill [Line Items]
Goodwill	111.0		128.3
Energy Equipment Group
Goodwill [Line Items]
Goodwill	506.9		508.5
Railcar Leasing and Management Services Group
Goodwill [Line Items]
Goodwill	$ 1.8		$ 1.8

[1] (unaudited)

[2] (as reported)