v3.26.3
Debt - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2026
Sep. 30, 2026
Oct. 19, 2026
Apr. 17, 2026
TRL-2025 Series 2026-1 Green Secured Railcar Equipment Notes        
Debt Instrument [Line Items]        
Payments of Debt Issuance Costs   $ 5.4    
Corporate Segment [Member] | Senior Notes due 2028 | 7.75% Senior Notes Due 2028        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage   7.75%    
Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Current Borrowing Capacity   $ 600.0    
Line Of Credit Facility Additional Borrowing Capacity   300.0    
Payments of Debt Issuance Costs   1.3    
Proceeds from Lines of Credit   0.0    
Repayments of Lines of Credit   0.0    
Line of Credit Facility, Remaining Borrowing Capacity   $ 592.4    
Debt Instrument, Basis Spread on Variable Rate   1.25%    
Debt Instrument, Interest Rate, Effective Percentage   5.13%    
Line of Credit Facility, Interest Rate at Period End   0.175%    
Corporate Segment [Member] | Letter of Credit [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Letters of Credit Outstanding, Amount   $ 7.6    
TILC [Member] | Leasing & Services | Revolving Credit Facility [Member] | Line of Credit [Member] | TILC Warehouse Facility [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Current Borrowing Capacity   800.0    
Proceeds from Lines of Credit   227.8    
Repayments of Lines of Credit   52.8    
Line of Credit Facility, Remaining Borrowing Capacity   $ 146.5    
Debt Instrument, Basis Spread on Variable Rate   1.75%    
Debt Instrument, Interest Rate, Effective Percentage   5.43%    
Wholly-owned subsidiaries | Leasing & Services | Secured Debt [Member] | TRL-2025 Series 2026-1 Class A Green Secured Railcar Equipment Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage       5.35%
Debt Instrument, Face Amount       $ 447.4
Wholly-owned subsidiaries | Leasing & Services | Secured Debt [Member] | TRL-2025 Series 2026-1 Class B Green Secured Railcar Equipment Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage       5.56%
Debt Instrument, Face Amount       $ 33.4
Wholly-owned subsidiaries | Leasing & Services | Secured Debt [Member] | TRL-2019 Series 2019-1 Secured Railcar Equipment Notes [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage       3.82%
Repayments of Debt   $ 377.1    
Wholly-owned subsidiaries | Leasing & Services | Secured Debt [Member] | TRL-2026 Term Loan [Member] | Subsequent Event        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage     1.30%  
Debt Instrument, Face Amount     $ 349.8  
Wholly-owned subsidiaries | Leasing & Services | Secured Debt [Member] | TRL-2019 Series 2019-2 Secured Railcar Equipment Notes | Subsequent Event        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage     3.10%  
Repayments of Debt $ 280.9      
Minimum | Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Interest Rate at Period End   0.175%    
Maximum | Corporate Segment [Member] | Revolving Credit Facility [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Line of Credit Facility, Interest Rate at Period End   0.30%