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Note 1. Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
Unsatisfied Performance Obligations
The following table includes estimated revenue expected to be recognized in future periods related to performance obligations that are unsatisfied or partially satisfied as of December 31, 2023 and the percentage of the outstanding performance obligations as of December 31, 2023 expected to be delivered during 2024:
Unsatisfied performance obligations at December 31, 2023
Total
Amount
Percent expected to be delivered in 2024
 (in millions)
Rail Products Group:
New railcars:
External customers $2,896.5 
Leasing Group
304.4 
$3,200.9 53.4 %
Sustainable railcar conversions$81.9 100.0 %
Maintenance services$6.6 100.0 %
Railcar Leasing and Management Services Group$65.0 27.0 %
Lease, Cost
The following table summarizes the impact of our operating leases on our Consolidated Financial Statements (in millions, except lease term and discount rate):
Year Ended
December 31,
202320222021
Consolidated Statements of Operations
Operating lease expense$19.5 $18.2 $15.2 
Short-term lease expense$— $0.4 $0.2 
Consolidated Statements of Cash Flows
Cash flows from operating activities$19.5 $18.2 $15.2 
Right-of-use assets recognized in exchange for new lease liabilities $24.1 $28.8 $23.0 
December 31, 2023December 31, 2022
Consolidated Balance Sheets
Right-of-use assets (1)
$100.6 $93.1 
Lease liabilities (2)
$118.2 $114.8 
Weighted average remaining lease term9.3 years9.9 years
Weighted average discount rate3.6 %2.8 %
(1) Included in other assets in our Consolidated Balance Sheets.
(2) Included in other liabilities in our Consolidated Balance Sheets.
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Future contractual minimum operating lease liabilities will mature as follows (in millions):
Leasing Group
Non-Leasing Group
Total
2024$10.1 $10.0 $20.1 
20258.8 9.0 17.8 
20268.0 8.3 16.3 
20277.0 8.1 15.1 
20284.3 7.3 11.6 
Thereafter6.7 51.4 58.1 
Total operating lease payments$44.9 $94.1 $139.0 
Less: Present value adjustment(20.8)
Total operating lease liabilities$118.2 
Operating Lease, Lease Income
The following table summarizes the impact of our leases in our Consolidated Statements of Operations:
Year Ended
December 31,
202320222021
Operating lease revenues$731.5 $679.4 $652.5 
Variable operating lease revenues$68.7 $60.3 $54.2 
Interest income on sales-type lease receivables$0.7 $0.7 $— 
Profit recognized at sales-type lease commencement (1)
$— $1.3 $— 
(1) Included in gains on dispositions of property – lease portfolio sales on our Consolidated Statements of Operations.
Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block]
Future contractual minimum revenues for operating leases will mature as follows (in millions)(1):
2024$682.3 
2025556.5 
2026435.3 
2027318.4 
2028184.9 
Thereafter320.0 
Total$2,497.4 
(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.
Sales-type and Direct Financing Leases, Lease Receivable, Maturity [Table Text Block]
Future contractual minimum lease receivables for sales-type leases will mature as follows (in millions):
2024$1.1 
20251.1 
20261.1 
20271.1 
20281.1 
Thereafter9.0 
Total14.5 
Less: Unearned interest income(4.3)
Net investment in sales-type leases (1)
$10.2 
(1) Included in other assets in our Consolidated Balance Sheets.
Property, Plant, and Equipment Estimated Useful Lives The estimated useful lives are as follows:
Buildings and improvements
5 – 30 years
Leasehold improvementsGenerally over the term of the lease
Machinery and equipment
Generally 3 – 15 years
Information systems hardware and software
3 – 5 years
Railcars in our lease fleet
Generally 35 – 40 years
Schedule of Product Warranty Liability [Table Text Block] The changes in the accruals for warranties for the years ended December 31, 2023, 2022, and 2021 are as follows:
 Year Ended December 31,
202320222021
 (in millions)
Beginning balance$3.3 $3.1 $11.3 
Warranty costs incurred(2.5)(2.7)(7.4)
Warranty originations and revisions3.3 3.2 0.1 
Warranty expirations(0.8)(0.3)(0.9)
Ending balance$3.3 $3.3 $3.1 
Supplier Finance Program [Table Text Block] The following is a summary of our outstanding obligations confirmed as valid under the supplier finance program for the year ended December 31, 2023:
Year Ended
December 31, 2023
(in millions)
Confirmed obligations outstanding at December 31, 2022
$22.8 
Invoices confirmed 91.3 
Confirmed invoices paid (95.8)
Confirmed obligations outstanding at December 31, 2023
$18.3