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	Mar. 31, 2018 USD ($)
Future contractual minimum rental revenue
Remaining nine months of 2018	$ 389.4
2018	444.4
2019	360.9
2020	255.9
2021	193.0
Thereafter	378.8
Total	$ 2,022.4