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Railway Operating Revenues - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Average transit days (or less)	7 days
Revenue, payment terms	15 days
Contract assets	$ 0	$ 0
Contract liabilities	0	0
Other Noncurrent Receivables
Disaggregation of Revenue [Line Items]
Accounts receivable, net, noncurrent	$ 0	$ 23,000,000
Ancillary Services
Disaggregation of Revenue [Line Items]
Accessorial services percent of total railway operating revenues	7.00%	7.00%	5.00%

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