Revenue from Contracts with Customers Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Revenues	$ 5,970	$ 5,693
Total freight revenues	5,808	5,531
Consumer Products
Disaggregation of Revenue [Line Items]
Revenues	2,042	2,033
Agricultural and Energy Products
Disaggregation of Revenue [Line Items]
Revenues	1,797	1,565
Industrial Products
Disaggregation of Revenue [Line Items]
Revenues	1,227	1,199
Coal
Disaggregation of Revenue [Line Items]
Revenues	742	734
Other revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 162	$ 162