Railcar Leasing and Management Services Group (Details 4) (Railcar Leasing and Management Services Group, USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Future contractual minimum rental revenues on leases
Remaining three months of 2014	$ 118.2
2015	425.7
2016	358.7
2017	292.0
2018	224.4
Thereafter	345.7
Total	1,764.7
Operating leases other than leases with the Trusts
Future contractual minimum rental obligations on leases
Remaining three months of 2014	3.2
2015	13.0
2016	12.8
2017	12.2
2018	12.2
Thereafter	38.3
Total	91.7
Future contractual minimum rental revenues on leases
Remaining three months of 2014	4.8
2015	13.9
2016	12.9
2017	9.7
2018	5.9
Thereafter	8.9
Total	$ 56.1