Railcar Leasing and Management Services Group - Future contractual minimum rental revenues on leases (Details) - Railcar Leasing and Management Services Group [Member] $ in Millions	Sep. 30, 2020 USD ($)
Future contractual minimum rental revenue
Remaining three months of 2020	$ 152.0	[1]
2021	516.5	[1]
2022	406.5	[1]
2023	296.9	[1]
2024	215.2	[1]
Thereafter	391.6	[1]
Total	1,978.7	[1]
Railroad Transportation Equipment
Future contractual minimum rental revenue
Remaining three months of 2020	150.3
2021	511.2
2022	402.8
2023	295.2
2024	214.5
Thereafter	391.5
Total	$ 1,965.5

[1] Total contractual minimum rental revenues on operating leases relates to our wholly-owned and partially-owned subsidiaries and sub-lease rental revenues associated with the Leasing Group's operating lease obligations.