Revenues - Disaggregated by Lines of Business (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 14,853	$ 12,522	$ 10,583
Total Merchandise
Disaggregation of Revenue [Line Items]
Revenue	8,239	7,539	7,076
Chemicals
Disaggregation of Revenue [Line Items]
Revenue	2,584	2,421	2,309
Agricultural and Food Products
Disaggregation of Revenue [Line Items]
Revenue	1,664	1,461	1,386
Automotive
Disaggregation of Revenue [Line Items]
Revenue	1,054	886	920
Forest Products
Disaggregation of Revenue [Line Items]
Revenue	996	918	834
Metals and Equipment
Disaggregation of Revenue [Line Items]
Revenue	828	796	675
Minerals
Disaggregation of Revenue [Line Items]
Revenue	658	587	538
Fertilizers
Disaggregation of Revenue [Line Items]
Revenue	455	470	414
Intermodal
Disaggregation of Revenue [Line Items]
Revenue	2,306	2,039	1,702
Coal
Disaggregation of Revenue [Line Items]
Revenue	2,434	1,790	1,397
Trucking
Disaggregation of Revenue [Line Items]
Revenue	966	410	0
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 908	$ 744	$ 408