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Railway Operating Revenues - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue, payment terms			15 days
Contract assets	$ 0		$ 0		$ 0
Contract liabilities	$ 0		$ 0		$ 0
Accessorial Services
Disaggregation of Revenue [Line Items]
Accessorial services percent of total railway operating revenues	4.00%	6.00%	5.00%	7.00%

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