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Railway Operating Revenues - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Average transit days (or less)			7 days
Revenue, payment terms (in days)			15 days
Contract assets	$ 0		$ 0		$ 0
Contract liabilities	$ 0		$ 0		$ 0
Ancillary Services
Disaggregation of Revenue [Line Items]
Ancillary services percent of total railway operating revenues (as a percent)	5.00%	4.00%	5.00%	4.00%

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