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Property, Plant, and Equipment - Components of property, plant, and equipment (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | $ 9,011.8 | $ 8,253.4
Less accumulated depreciation | (2,095.1) | (1,919.0)
Property, plant, and equipment, net | 6,916.7 | 6,334.4
Operating Segments |  |
Components of property, plant, and equipment |  |
Property, plant, and equipment, net | 7,787.8 | 7,162.1
Net deferred profit on railcars sold to the Leasing Group |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | (1,094.7) | (1,030.0)
Less accumulated amortization | 223.6 | 202.3
Property, plant, and equipment, net | (871.1) | (827.7)
Manufacturing/ Corporate |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 1,013.8 | 963.2
Less accumulated depreciation | (617.5) | (592.3)
Property, plant, and equipment, net | 396.3 | 370.9
Manufacturing/ Corporate | Land |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 25.5 | 24.2
Manufacturing/ Corporate | Buildings and improvements |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 389.0 | 385.5
Manufacturing/ Corporate | Machinery and other |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 548.9 | 537.2
Manufacturing/ Corporate | Construction in progress |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 50.4 | 16.3
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Operating Segments |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 6,691.7 | 5,948.3
Less accumulated depreciation | (1,094.7) | (971.8)
Property, plant, and equipment, net | 5,597.0 | 4,976.5
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Machinery and other | Operating Segments |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 13.8 | 13.5
Wholly-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Equipment on lease | Operating Segments |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 6,677.9 | 5,934.8
Partially-owned subsidiaries |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 2,057.5 | 2,032.0
Less accumulated depreciation | (513.6) | (472.0)
Partially-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Operating Segments |  |
Components of property, plant, and equipment |  |
Property, plant, and equipment, net | 1,794.5 | 1,814.7
Partially-owned subsidiaries | Railcar Leasing and Management Services Group [Member] | Equipment on lease | Operating Segments |  |
Components of property, plant, and equipment |  |
Property, Plant and Equipment, Gross | 2,401.0 | 2,371.9
Less accumulated depreciation | $ (606.5) | $ (557.2)

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