Railcar Leasing and Management Services Group (Details 5) - Railcar Leasing and Management Services Group $ in Millions	Jun. 30, 2015 USD ($)
Future contractual minimum rental revenues on leases
Remaining six months of 2015	$ 264.8
2016	461.8
2017	387.9
2018	307.9
2019	224.1
Thereafter	339.4
Total	1,985.9
Operating leases other than leases with the Trusts
Future contractual minimum rental obligations on leases
Remaining six months of 2015	6.5
2016	12.8
2017	12.1
2018	12.0
2019	9.5
Thereafter	28.7
Total	81.6
Future contractual minimum rental revenues on leases
Remaining six months of 2015	10.2
2016	18.6
2017	12.9
2018	6.7
2019	3.7
Thereafter	5.9
Total	$ 58.0