Railcar Leasing and Management Services Group (Details 4) - Railcar Leasing and Management Services Group $ in Millions	Jun. 30, 2017 USD ($)
Railroad transportation equipment leased from independent owner trusts
Future operating lease obligations
Remaining six months of 2017	$ 14.6
2018	29.2
2019	28.8
2020	26.1
2021	26.1
Thereafter	117.9
Total	242.7
Future contractual minimum rental revenues
Remaining six months of 2017	21.6
2018	34.2
2019	23.5
2020	14.3
2021	9.5
Thereafter	13.7
Total	116.8
Operating leases other than leases with the Trusts
Future operating lease obligations
Remaining six months of 2017	5.9
2018	12.0
2019	9.5
2020	7.7
2021	7.6
Thereafter	13.5
Total	56.2
Future contractual minimum rental revenues
Remaining six months of 2017	6.7
2018	9.2
2019	6.8
2020	4.5
2021	3.3
Thereafter	4.1
Total	$ 34.6