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	Sep. 30, 2018 USD ($)
Future contractual minimum rental revenue
Remaining three months of 2018	$ 129.0
2018	450.8
2019	371.7
2020	266.8
2021	200.7
Thereafter	382.3
Total	$ 1,801.3