Railcar Leasing and Management Services Group (Details 4) - Railcar Leasing and Management Services Group $ in Millions	Mar. 31, 2017 USD ($)
Railroad transportation equipment leased from independent owner trusts
Future operating lease obligations
Remaining nine months of 2017	$ 21.9
2018	29.2
2019	28.8
2020	26.1
2021	26.1
Thereafter	117.9
Total	250.0
Future contractual minimum rental revenues
Remaining nine months of 2017	33.1
2018	34.3
2019	24.0
2020	14.7
2021	9.6
Thereafter	14.6
Total	130.3
Operating leases other than leases with the Trusts
Future operating lease obligations
Remaining nine months of 2017	9.0
2018	12.0
2019	9.5
2020	7.7
2021	7.6
Thereafter	13.5
Total	59.3
Future contractual minimum rental revenues
Remaining nine months of 2017	10.3
2018	8.3
2019	6.2
2020	4.3
2021	3.3
Thereafter	4.1
Total	$ 36.5