Operating Assets and Facilities (Details1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 451.7	$ 420.9	$ 391.5
Operating Assets and Facilities
Property, Plant and Equipment [Line Items]
Total depreciation expense	445.2	414.2	385.6
Operating assets and facilities, included in depreciation expense
Property, Plant and Equipment [Line Items]
Total depreciation expense	431.8	402.4	376.3
Maintenance operating assets and facilities, included in maintenance expense
Property, Plant and Equipment [Line Items]
Total depreciation expense	13.4	11.8	9.3
Non-operating assets, included in SG&A
Property, Plant and Equipment [Line Items]
Total depreciation expense	$ 6.5	$ 6.7	$ 5.9