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Note 1. Summary of Significant Accounting Policies Revenue Recognition (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Sales-type Lease, Revenue |  | $ 0.0 |
Billed Contracts Receivable |  | $ 4.5 | $ 2.9
Rail Products Group [Member] | Railcar products [Domain] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Revenue, Remaining Performance Obligation, Amount |  |  | $ 3,903.0
Revenue, remaining performance obligation expected to be delivered in current year |  |  | 48.50%
Rail Products Group [Member] | Railcar products [Domain] | External Customers [Member] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Revenue, Remaining Performance Obligation, Amount | [1] |  | $ 3,444.1
Rail Products Group [Member] | Railcar products [Domain] | Leasing [Member] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Revenue, Remaining Performance Obligation, Amount |  |  | 458.9
Rail Products Group [Member] | Sustainable Railcar Conversions |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Revenue, Remaining Performance Obligation, Amount |  |  | $ 166.5
Revenue, remaining performance obligation expected to be delivered in current year |  |  | 73.50%
Rail Products Group [Member] | Rail Products [Domain] | GATX |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Revenue, Remaining Performance Obligation, Amount |  |  | $ 1,800.0
Railcar Leasing and Management Services Group [Member] |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Revenue, Remaining Performance Obligation, Amount |  |  | $ 75.5
Revenue, remaining performance obligation expected to be delivered in current year |  |  | 20.40%
[1] | Unsatisfied performance obligations at December 31, 2022 include 15,000 railcars expected to be delivered through 2028, valued at approximately $1.8 billion, associated with a new long-term railcar supply agreement with GATX Corporation.

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