Note 6. Railcar Leasing and Management Services Group Other Operating Lease Obligations and Revenues (Details) $ in Millions	Dec. 31, 2023 USD ($)
Sale Leaseback Transaction [Line Items]
2024	$ 20.1
2025	17.8
2026	16.3
2027	15.1
2028	11.6
Thereafter	58.1
Lessee, Operating Lease, Liability, to be Paid	139.0
Railcar Leasing and Management Services Group [Member]
Sale Leaseback Transaction [Line Items]
2024	10.1
2025	8.8
2026	8.0
2027	7.0
2028	4.3
Thereafter	6.7
Lessee, Operating Lease, Liability, to be Paid	44.9
2024	682.3	[1]
2025	556.5	[1]
2026	435.3	[1]
2027	318.4	[1]
2028	184.9	[1]
Thereafter	320.0	[1]
Total	2,497.4	[1]
Railcar Leasing and Management Services Group [Member] | Property Lease Guarantee [Member]
Sale Leaseback Transaction [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	0.9
Other Third Parties [Member] | Railcar Leasing and Management Services Group [Member]
Sale Leaseback Transaction [Line Items]
2024	7.5
2025	5.1
2026	3.2
2027	0.9
2028	0.2
Thereafter	0.0
Total	16.9
Railroad Transportation Equipment [Member] | Railcar Leasing and Management Services Group [Member]
Sale Leaseback Transaction [Line Items]
2024	8.0
2025	7.2
2026	6.9
2027	6.5
2028	4.3
Thereafter	6.7
Lessee, Operating Lease, Liability, to be Paid	39.6
Operating Leases Other Than Railcars | Railcar Leasing and Management Services Group [Member]
Sale Leaseback Transaction [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 5.3

[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.