v3.26.1
Segment Information - Financial information for segments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]              
External Revenue $ 485.1   $ 506.2   $ 977.1 $ 1,091.6  
Revenues, Total 485.1   506.2   977.1 1,091.6  
Depreciation and amortization 71.5   75.2   144.1 149.5  
Selling, engineering, and administrative expenses 51.1   49.4   101.8 99.4  
Gain (Loss) on Sale of Property, Plant and Equipment, Railroad Transportation Equipment (8.2)   (7.8)   (30.2) (13.7)  
Gain on Divestiture of Partially-owned Leasing Subsidiary (131.6)   0.0   (131.6) 0.0  
Operating Profit (Loss) 199.8   95.4   300.9 195.2  
Other (income) expense 65.8   69.4   131.8 132.8  
Provision for income taxes 31.8   4.1   40.3 11.5  
Loss from discontinued operations, net of benefit for income taxes of $1.1, $0.5, $1.7, and $1.1 (3.9)   (1.9)   (5.7) (3.8)  
Net income 98.3 $ 24.8 20.0 $ 27.1 123.1 47.1  
Assets 8,232.0       8,232.0   $ 8,424.4
Operating Segment Assets 8,423.0       8,423.0   8,614.5
Segment Reporting, Long-Lived Asset, Expenditure for Addition 101.0   184.2   258.3 313.6  
Operating Segments [Member]              
Segment Reporting [Line Items]              
Revenues, Total 539.6   595.9   1,125.4 1,303.8  
Operating Profit (Loss) 227.7   127.5   358.0 257.9  
Intersegment Eliminations [Member]              
Segment Reporting [Line Items]              
Intersegment Revenues 54.5   89.7   148.3 212.2  
Revenues, Total (54.5)   (89.7)   (148.3) (212.2)  
Operating Profit (Loss) (0.8)   (5.6)   (4.3) (11.8)  
Assets (510.8)       (510.8)   (575.1)
Leasing & Services              
Segment Reporting [Line Items]              
External Revenue 280.6   302.1   565.9 589.3  
Depreciation and amortization 64.4   67.4   129.3 133.9  
Segment Reporting, Long-Lived Asset, Expenditure for Addition 94.4   179.1   247.7 301.6  
Leasing & Services | Operating Segments [Member]              
Segment Reporting [Line Items]              
Revenues, Total 281.1   302.4   566.9 589.8  
Selling, engineering, and administrative expenses [1] 16.3   13.9   33.8 32.6  
Gain (Loss) on Sale of Property, Plant and Equipment, Railroad Transportation Equipment [1] (8.2)   (7.8)   (30.2) (13.7)  
Gain on Divestiture of Partially-owned Leasing Subsidiary [1] (131.6)   0.0   (131.6) 0.0  
Segment Reporting, Other Segment Item, Amount [2] 81.1   72.8   162.9 143.8  
Operating Profit (Loss) 224.3   118.6   332.5 223.1  
Assets 7,473.5       7,473.5   7,676.5
Leasing & Services | Operating Segments [Member] | Railroad Transportation Equipment [Member]              
Segment Reporting [Line Items]              
Depreciation and amortization [1],[3] 57.0   61.8   116.2 122.9  
Maintenance and compliance expense (5) [1],[3],[4] 42.2   43.1   83.3 81.1  
Leasing & Services | Intersegment Eliminations [Member]              
Segment Reporting [Line Items]              
Intersegment Revenues 0.5   0.3   1.0 0.5  
Rail Products Group [Member]              
Segment Reporting [Line Items]              
External Revenue 204.5   204.1   411.2 502.3  
Depreciation and amortization 6.5   6.9   13.4 13.9  
Segment Reporting, Long-Lived Asset, Expenditure for Addition 5.8   4.6   8.5 11.2  
Rail Products Group [Member] | Operating Segments [Member]              
Segment Reporting [Line Items]              
Revenues, Total 258.5   293.5   558.5 714.0  
Cost of Revenue [1],[5] 247.4   277.9   517.8 665.6  
Selling, engineering, and administrative expenses [1] 7.6   6.7   15.1 13.6  
Segment Reporting, Other Segment Item, Amount [2] 0.1   0.0   0.1 0.0  
Operating Profit (Loss) 3.4   8.9   25.5 34.8  
Assets 949.5       949.5   938.0
Rail Products Group [Member] | Intersegment Eliminations [Member]              
Segment Reporting [Line Items]              
Intersegment Revenues 54.0   89.4   147.3 211.7  
Corporate Segment [Member]              
Segment Reporting [Line Items]              
Depreciation and amortization 0.6   0.9   1.4 1.7  
Operating Profit (Loss) (27.1)   (26.5)   (52.8) (50.9)  
Segment Reporting, Long-Lived Asset, Expenditure for Addition 0.8   $ 0.5   2.1 $ 0.8  
Corporate Segment and Other Operating Segment | Operating Segments [Member]              
Segment Reporting [Line Items]              
Assets $ 319.8       $ 319.8   $ 385.0
[1] Significant expense categories and amounts align with the segment-level information that is regularly provided to and reviewed by the CODM. Intersegment expenses are included within the amounts shown.
[2] Other segment items for each reportable segment include:
–Railcar Leasing and Services Group: the remaining operating costs for our maintenance services and digital and logistics services businesses, including materials, labor, and overhead costs; other operating costs for the lease fleet, including equipment rental, property taxes, and freight and storage expenses; and gains or losses on dispositions of other property.
–Rail Products Group: (gains) or losses on dispositions of other property.
[3] Company-owned railcars include wholly-owned railcars, partially-owned railcars, and railcars under leased-in arrangements.
[4] Maintenance and compliance expense is reported at cost with respect to the services performed by our maintenance services business to support the railcars in our lease fleet.
[5] Cost of revenues in the Rail Products Group primarily includes materials, labor, and overhead, including depreciation and amortization.