Revenues - Schedule of Accounts Receivables, Net (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Accounts Receivable, net	$ 1,298	$ 1,326
Freight Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivables, gross	932	1,012
Allowance for Credit Losses	(23)	(16)
Total Accounts Receivable, net	909	996
Non-Freight Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivables, gross	404	343
Allowance for Credit Losses	(15)	(13)
Total Accounts Receivable, net	$ 389	$ 330