Note 1. Summary of Significant Accounting Policies Lessor Accounting (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Renewal Term		5 years
Sales-type Lease, Revenue		$ 0.0	$ 0.0	$ 160.5
Direct Financing Lease, Revenue		0.0	0.0
Operating lease revenues		652.5	671.4	676.3
Variable operating lease revenues		54.2	51.0	50.5
Interest income on sales-type lease receivables		0.0	0.0	2.4
Profit recognized at sales-type lease commencement		0.0	$ 0.0	$ 19.0
Railcar Leasing and Management Services Group [Member]
Lessor, Lease, Description [Line Items]
2022	[1]	546.5
2023	[1]	411.5
2024	[1]	307.5
2025	[1]	219.9
2026	[1]	140.0
Thereafter	[1]	260.2
Total	[1]	$ 1,885.6
Railcar Leasing and Management Services Group [Member] | Minimum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Term of Contract		1 year
Railcar Leasing and Management Services Group [Member] | Maximum [Member]
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Term of Contract		10 years

[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.