v3.26.3
Revenue 606 (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues $ 535.1 $ 454.1 $ 1,512.2 $ 1,545.7  
Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues 625.8 579.8 1,751.2 1,883.6  
Intersegment Eliminations [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues (90.7) (125.7) (239.0) (337.9)  
Leasing & Services          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Billed Contracts Receivable 20.0   20.0   $ 10.9
Leasing & Services | Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues 286.3 301.0 853.2 890.8  
Leasing & Services | Leasing and Management [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount $ 82.9   $ 82.9    
Revenue, remaining performance obligation expected to be delivered in current year 7.00%   7.00%    
Leasing & Services | Leasing and Management [Member] | Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues $ 206.7 231.8 $ 623.0 684.3  
Leasing & Services | Maintenance services          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount $ 8.2   $ 8.2    
Revenue, remaining performance obligation expected to be delivered in current year 100.00%   100.00%    
Leasing & Services | Maintenance services | Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues $ 68.6 59.1 $ 195.2 177.6  
Leasing & Services | Digital & Logistics Services | Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues 11.0 10.1 35.0 28.9  
Rail Products Group [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Billed Contracts Receivable 6.5   6.5   $ 4.9
Rail Products Group [Member] | Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues 339.5 278.8 898.0 992.8  
Rail Products Group [Member] | Rail Products [Domain]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount $ 1,646.7   $ 1,646.7    
Revenue, remaining performance obligation expected to be delivered in current year 25.00%   25.00%    
Rail Products Group [Member] | Rail Products [Domain] | Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues $ 311.5 251.6 $ 816.8 902.2  
Rail Products Group [Member] | Rail Products [Domain] | External Customers          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount 1,313.0   1,313.0    
Rail Products Group [Member] | Rail Products [Domain] | Leasing & Services          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount 333.7   333.7    
Rail Products Group [Member] | Parts & Components | Operating Segments [Member]          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenues 28.0 $ 27.2 81.2 $ 90.6  
Rail Products Group [Member] | Sustainable Railcar Conversions          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount $ 5.8   $ 5.8    
Revenue, remaining performance obligation expected to be delivered in current year 24.00%   24.00%