Operating Assets and Facilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 14,330.6	$ 13,081.9
Less: allowance for depreciation	(3,880.9)	(3,670.7)
Operating assets and facilities, net	10,449.7	9,411.2
Total depreciation expense	420.9	391.5	$ 371.3
Interest Expense, Deposits	24.3	15.2	6.4
Railcars and locomotives
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	12,702.9	11,700.8
Aircraft spare engines
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,030.4	769.7
Tank containers
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	241.4	237.7
Buildings, leasehold improvements, and other equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	265.3	253.0
Other
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	90.6	120.7
Operating Assets and Facilities
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 414.2	$ 385.6	$ 365.0