v3.25.1
Operating Assets and Facilities
 3 Months Ended
Mar. 31, 2025
Property, Plant and Equipment [Abstract]  
Operating Assets and Facilities Operating Assets and Facilities
The following table shows the components of our operating assets and facilities (in millions):

March 31
2025		December 31
2024
Railcars and locomotives$13,033.1 $12,702.9 
Aircraft spare engines1,030.4 1,030.4 
Tank containers253.9 241.4 
Buildings, leasehold improvements, and other equipment274.5 265.3 
Other119.2 90.6 
$14,711.1 $14,330.6 
Less: allowance for depreciation(3,989.9)(3,880.9)
Net operating assets and facilities$10,721.2 $10,449.7 

Total depreciation expense was $108.4 million for the three months ended March 31, 2025 and $100.5 million for the three months ended March 31, 2024.