Debt (Details 2) $ in Millions	Mar. 31, 2016 USD ($)
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	$ 90.9
2017	108.8
2018	144.1
2019	354.2
2020	119.7
Thereafter	2,428.3
Corporate
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	0.2
2017	0.3
2018	0.0
2019	0.0
2020	0.0
Thereafter	849.4
Railcar Leasing and Management Services Group | Capital lease obligations, net of unamortized debt issuances costs of $0.1 and $0.1
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	2.6
2017	3.7
2018	28.7
2019	0.0
2020	0.0
Thereafter	0.0
Railcar Leasing and Management Services Group | Non-recourse debt | 2006 secured railcar equipment notes
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	20.6
2017	23.9
2018	25.3
2019	28.0
2020	29.8
Thereafter	75.2
Railcar Leasing and Management Services Group | Non-recourse debt | 2009 secured railcar equipment notes
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	4.9
2017	6.3
2018	6.4
2019	11.2
2020	6.6
Thereafter	142.0
Railcar Leasing and Management Services Group | Non-recourse debt | 2010 secured railcar equipment notes
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	11.2
2017	13.7
2018	10.0
2019	7.6
2020	14.2
Thereafter	235.4
Railcar Leasing and Management Services Group | Non-recourse debt | TRL 2012 secured railcar equipment notes (RIV 2013)
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	16.9
2017	22.9
2018	23.1
2019	22.2
2020	19.5
Thereafter	339.0
Railcar Leasing and Management Services Group | Non-recourse debt | TRIP Master Funding secured railcar equipment notes (TRIP Holdings)
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	27.9
2017	29.2
2018	41.8
2019	50.1
2020	49.6
Thereafter	787.3
Railcar Leasing and Management Services Group | Line of credit | Revolving credit facility | TILC warehouse facility
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	6.6
2017	8.8
2018	8.8
2019	2.2
2020	0.0
Thereafter	0.0
Railcar Leasing and Management Services Group | Line of credit | Revolving credit facility | Facility termination payments - TILC warehouse facility
Remaining principal payments under existing debt agreements
Remaining nine months of 2016	0.0
2017	0.0
2018	0.0
2019	232.9
2020	0.0
Thereafter	$ 0.0