v3.25.1
Summary of Significant Accounting Policies Lessor Accounting (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Lessor, Lease, Description [Line Items]    
Lessor, Operating Lease, Renewal Term 5 years  
Direct Financing Lease, Revenue $ 0.0  
Operating lease revenues 201.8 $ 191.8
Variable operating lease revenues 13.2 13.7
Interest income on sales-type lease receivables 0.2 $ 0.2
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Remainder of Fiscal Year 0.8  
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Two 1.1  
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Three 1.1  
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Four 1.1  
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year Five 1.1  
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Five 7.9  
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received 13.1  
Less: Unearned interest income (3.5)  
Other Assets [Member]    
Lessor, Lease, Description [Line Items]    
Net investment in sales-type leases (1) [1] 9.6  
Railcar Leasing and Services Group [Member]    
Lessor, Lease, Description [Line Items]    
Remaining nine months of 2025 [2] 561.4  
2026 [2] 633.3  
2027 [2] 496.1  
2028 [2] 332.3  
2029 [2] 210.1  
Thereafter [2] 417.4  
Total [2] $ 2,650.6  
Minimum | Railcar Leasing and Services Group [Member]    
Lessor, Lease, Description [Line Items]    
Lessor, Operating Lease, Term of Contract 1 year  
Maximum | Railcar Leasing and Services Group [Member]    
Lessor, Lease, Description [Line Items]    
Lessor, Operating Lease, Term of Contract 10 years  
[1] Included in other assets in our Consolidated Balance Sheets
[2] 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.