Note 1. Summary of Significant Accounting Policies Lessor Accounting (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Lessor, Lease, Description [Line Items]
Lessor, Operating Lease, Renewal Term		5 years
Direct Financing Lease, Revenue		$ 0.0		$ 0.0
Operating lease revenues		679.4		652.5	$ 671.4
Variable operating lease revenues		60.3		54.2	51.0
Interest income on sales-type lease receivables		0.7		0.0	0.0
Profit recognized at sales-type lease commencement (1)		1.3	[1]	$ 0.0	$ 0.0
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Next Twelve Months	[2]	1.1
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years	[2]	1.1
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years	[2]	1.1
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years	[2]	1.1
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years	[2]	1.1
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter	[2]	10.1
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	[2]	15.6
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount		(5.0)
Railcar Leasing and Management Services Group [Member]
Lessor, Lease, Description [Line Items]
2023	[3]	596.2
2024	[3]	472.6
2025	[3]	369.7
2026	[3]	264.6
2027	[3]	175.5
Thereafter	[3]	265.1
Total	[3]	$ 2,143.7
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
Other Assets [Member]
Lessor, Lease, Description [Line Items]
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount	[2]	$ (10.6)

[1] Included in gains on dispositions of property – lease portfolio sales on our Consolidated Statements of Operations.

[2] Included in other assets in our Consolidated Balance Sheets.

[3] 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.