Railcar Leasing and Management Services Group (Details 4) (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 other than leases with the Trusts
Future contractual minimum rental obligations on leases
Remaining six months of 2014	6.5
2015	13.0
2016	12.8
2017	12.2
2018	12.2
Thereafter	38.2
Total	94.9
Future contractual minimum rental revenues on leases
Remaining six months of 2014	9.6
2015	13.8
2016	12.7
2017	9.5
2018	5.7
Thereafter	8.8
Total	$ 60.1