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, 2017 USD ($)
Future contractual minimum rental revenue
Remaining three months of 2017	$ 135.2
2018	480.9
2019	398.4
2020	316.8
2021	213.1
Thereafter	435.0
Total	$ 1,979.4