Railcar Leasing and Management Services Group (Details 4) - Railcar Leasing and Management Services Group $ in Millions	Sep. 30, 2016 USD ($)
Railroad transportation equipment leased from independent owner trusts
Future operating lease obligations
Remaining three months of 2016	$ 7.3
2017	29.2
2018	29.2
2019	28.8
2020	26.1
Thereafter	144.1
Total	264.7
Future contractual minimum rental revenues
Remaining three months of 2016	12.7
2017	43.7
2018	34.3
2019	23.8
2020	14.1
Thereafter	23.5
Total	152.1
Other Third Parties [Member]
Future operating lease obligations
Remaining three months of 2016	3.1
2017	12.1
2018	12.0
2019	9.5
2020	7.7
Thereafter	20.7
Total	65.1
Future contractual minimum rental revenues
Remaining three months of 2016	4.6
2017	14.5
2018	7.4
2019	5.4
2020	3.5
Thereafter	6.6
Total	$ 42.0