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Railcar Leasing and Management Services Group - Future contractual minimum rental revenues on leases (Details) - Railcar Leasing and Management Services Group [Member]
$ in Millions
Mar. 31, 2021
USD ($)
Future contractual minimum rental revenue  
Remaining nine months of 2021 $ 423.5 [1]
2022 457.5 [1]
2023 339.8 [1]
2024 252.7 [1]
2025 174.9 [1]
Thereafter 307.6 [1]
Total 1,956.0 [1]
Railroad Transportation Equipment  
Future contractual minimum rental revenue  
Remaining nine months of 2021 419.2
2022 453.6
2023 337.9
2024 251.7
2025 174.6
Thereafter 307.4
Total $ 1,944.4
[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.