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Revenues
 3 Months Ended
Mar. 31, 2024
Revenue from Contract with Customer [Abstract]  
Revenues Revenues
The Company’s revenues are primarily derived from the transportation of freight as performance obligations that arise from its contracts with customers are satisfied. The following table presents the Company’s revenues disaggregated by market as this best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors:

First Quarters
(Dollars in Millions)
20242023
Chemicals$693 $650 
Agricultural and Food Products407 437 
Automotive293 274 
Forest Products262 261 
Metals and Equipment220 239 
Minerals174 173 
Fertilizers136 129 
Total Merchandise2,185 2,163 
Coal632 633 
Intermodal506 499 
Trucking215 233 
Other143 178 
Total$3,681 $3,706 

The Company’s accounts receivable - net consists of freight and non-freight receivables, reduced by an allowance for credit losses. Freight receivables include amounts earned, billed and unbilled, and currently due from customers for transportation-related services. Non-freight receivables include amounts billed and unbilled and currently due related to government reimbursement receivables and other non-revenue receivables.
(Dollars in Millions)
March 31,
2024		December 31,
2023
Freight Receivables $1,060 $1,047 
Freight Allowance for Credit Losses(18)(18)
Freight Receivables - Net1,042 1,029 
Non-Freight Receivables 370 378 
Non-Freight Allowance for Credit Losses(12)(14)
Non-Freight Receivables - Net 358 364 
Total Accounts Receivable - Net$1,400 $1,393 

The Company maintains an allowance for credit losses to provide for the estimated amount of receivables that will not be collected. The allowance is based upon an assessment of risk characteristics, historical payment experience, and the age of outstanding receivables adjusted for forward-looking economic conditions as necessary. Credit losses recognized on the Company’s accounts receivable were not material in the first quarters 2024 and 2023.