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Revenues
 9 Months Ended
Sep. 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:

Third QuartersNine Months
(Dollars in Millions)
2024202320242023
Chemicals$727 $646 $2,142 $1,938 
Agricultural and Food Products416 376 1,229 1,228 
Automotive301 308 930 905 
Forest Products259 243 790 761 
Metals and Equipment208 225 658 704 
Minerals202 190 583 554 
Fertilizers118 124 380 381 
Total Merchandise2,231 2,112 6,712 6,471 
Coal553 594 1,748 1,864 
Intermodal509 517 1,521 1,508 
Trucking214 218 650 678 
Other112 131 370 456 
Total$3,619 $3,572 $11,001 $10,977 

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)
September 30,
2024		December 31,
2023
Freight Receivables $1,045 $1,047 
Freight Allowance for Credit Losses(17)(18)
Freight Receivables - Net1,028 1,029 
Non-Freight Receivables 398 378 
Non-Freight Allowance for Credit Losses(13)(14)
Non-Freight Receivables - Net 385 364 
Total Accounts Receivable - Net$1,413 $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 third quarters or nine months ended September 30, 2024, and 2023.