Revenue from Contracts with Customers Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenues	$ 5,693	$ 5,660
Total freight revenues	5,531	5,527
Total other revenues	162	133
Consumer Products
Disaggregation of Revenue [Line Items]
Revenues	2,033	1,970
Agricultural and Energy Products
Disaggregation of Revenue [Line Items]
Revenues	1,565	1,552
Industrial Products
Disaggregation of Revenue [Line Items]
Revenues	1,199	1,240
Coal
Disaggregation of Revenue [Line Items]
Revenues	734	765
Non-rail logistics subsidiary
Disaggregation of Revenue [Line Items]
Revenues	18	16
Accessorial and other
Disaggregation of Revenue [Line Items]
Revenues	$ 144	$ 117