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Revenues
 6 Months Ended
Jun. 30, 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:

Second QuartersSix Months
(Dollars in Millions)
2024202320242023
Chemicals$722 $642 $1,415 $1,292 
Agricultural and Food Products406 415 813 852 
Automotive336 323 629 597 
Forest Products269 257 531 518 
Metals and Equipment230 240 450 479 
Minerals207 191 381 364 
Fertilizers126 128 262 257 
Total Merchandise2,296 2,196 4,481 4,359 
Coal563 637 1,195 1,270 
Intermodal506 492 1,012 991 
Trucking221 227 436 460 
Other115 147 258 325 
Total$3,701 $3,699 $7,382 $7,405 

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)
June 30,
2024		December 31,
2023
Freight Receivables $1,069 $1,047 
Freight Allowance for Credit Losses(17)(18)
Freight Receivables - Net1,052 1,029 
Non-Freight Receivables 392 378 
Non-Freight Allowance for Credit Losses(14)(14)
Non-Freight Receivables - Net 378 364 
Total Accounts Receivable - Net$1,430 $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 second quarters or six months ended June 30, 2024, and 2023.