Railcar Leasing and Management Services Group (Details 3) (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 with the Trusts
Future contractual minimum rental obligations on leases
Remaining three months of 2014	11.2
2015	43.0
2016	40.0
2017	41.8
2018	45.2
Thereafter	253.3
Total	434.5
Future contractual minimum rental revenues on leases
Remaining three months of 2014	18.6
2015	66.3
2016	54.6
2017	43.4
2018	32.7
Thereafter	54.4
Total	$ 270.0