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Accounts Receivable, Net	12 Months Ended
Accounts Receivable, Net	Dec. 31, 2023
Receivables [Abstract]
Accounts Receivable, Net	Accounts Receivable, Net Accounts receivable, net consists of freight and other receivables, reduced by an allowance for credit losses which is based upon expected collectability. As of December 31, 2023 and 2022, $43 million and $32 million, respectively, of such allowances had been recorded.