Railcar Leasing and Management Services Group - Future contractual minimum rental revenues on leases (Details) - Railcar Leasing and Management Services Group - Railroad Transportation Equipment $ in Millions	Jun. 30, 2018 USD ($)
Future contractual minimum rental revenue
Remaining six months of 2018	$ 258.4
2018	451.9
2019	367.7
2020	261.0
2021	197.0
Thereafter	370.4
Total	$ 1,906.4