Railcar Leasing and Management Services Group (Details 3) (Railcar Leasing and Management Services Group, USD $) In Millions, unless otherwise specified	Jun. 30, 2014
Future contractual minimum rental revenues on leases
Remaining six months of 2014	$ 221.0
2015	388.9
2016	325.1
2017	261.7
2018	196.6
Thereafter	295.8
Total	1,689.1
Operating leases with the Trusts
Future contractual minimum rental obligations on leases
Remaining six months of 2014	22.4
2015	43.0
2016	40.0
2017	41.8
2018	45.2
Thereafter	253.3
Total	445.7
Future contractual minimum rental revenues on leases
Remaining six months of 2014	35.3
2015	61.7
2016	50.9
2017	40.2
2018	29.6
Thereafter	50.2
Total	$ 267.9