Railcar Leasing and Management Services Group (Details 4) - Railcar Leasing and Management Services Group $ in Millions	Jun. 30, 2016 USD ($)
Railroad transportation equipment leased from independent owner trusts
Future operating lease obligations
Remaining six months of 2016	$ 14.7
2017	29.2
2018	29.2
2019	28.8
2020	26.1
Thereafter	144.0
Total	272.0
Future contractual minimum rental revenues
Remaining six months of 2016	24.7
2017	41.9
2018	32.1
2019	22.4
2020	13.6
Thereafter	23.3
Total	158.0
Other Third Parties [Member]
Future operating lease obligations
Remaining six months of 2016	6.4
2017	12.1
2018	12.0
2019	9.5
2020	7.7
Thereafter	20.6
Total	68.3
Future contractual minimum rental revenues
Remaining six months of 2016	9.3
2017	13.2
2018	8.0
2019	4.6
2020	2.6
Thereafter	4.4
Total	$ 42.1