Operating Assets and Facilities (Tables)

12 Months Ended

Dec. 31, 2024

Property, Plant and Equipment [Abstract]

Operating Assets and Facilities

The following table shows the components of our operating assets and facilities as of December 31 (in millions):

	2024		2023
Railcars and locomotives	$	12,702.9	$	11,700.8
Aircraft spare engines	1,030.4		769.7
Tank containers	241.4		237.7
Buildings, leasehold improvements, and other equipment	265.3		253.0
Other	90.6		120.7
	$	14,330.6	$	13,081.9
Less: allowance for depreciation	(3,880.9)		(3,670.7)
Net operating assets and facilities	$	10,449.7	$	9,411.2

The following table shows the components of our total depreciation expense for the years ended December 31 (in millions):

	2024		2023		2022
Operating assets and facilities, included in depreciation expense	$	402.4	$	376.3	$	357.5
Maintenance operating assets and facilities, included in maintenance expense	11.8		9.3		7.5
Depreciation on operating assets and facilities	$	414.2	$	385.6	$	365.0
Non-operating assets, included in SG&A	6.7		5.9		6.3
Total depreciation expense	$	420.9	$	391.5	$	371.3