Operating Assets and Facilities (Details1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 420.9	$ 391.5	$ 371.3
Operating Assets and Facilities
Property, Plant and Equipment [Line Items]
Total depreciation expense	414.2	385.6	365.0
Operating assets and facilities, included in depreciation expense
Property, Plant and Equipment [Line Items]
Total depreciation expense	402.4	376.3	357.5
Maintenance operating assets and facilities, included in maintenance expense
Property, Plant and Equipment [Line Items]
Total depreciation expense	11.8	9.3	7.5
Non-operating assets, included in SG&A
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 6.7	$ 5.9	$ 6.3