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Railway Operating Revenues
9 Months Ended
Sep. 30, 2022
Revenue from Contract with Customer [Abstract]  
Railway Operating Revenues Railway Operating Revenues
The following table disaggregates our revenues by major commodity group:
Third QuarterFirst Nine Months
2022202120222021
($ in millions)
Merchandise:
Agriculture, forest and consumer products$642 $564 $1,839 $1,681 
Chemicals570 504 1,620 1,457 
Metals and construction442 424 1,237 1,196 
Automotive276 218 759 664 
Merchandise1,930 1,710 5,455 4,998 
Intermodal942 812 2,768 2,332 
Coal471 330 1,285 960 
Total$3,343 $2,852 $9,508 $8,290 

We recognize the amount of revenues to which we expect to be entitled for the transfer of promised goods or services to customers. A performance obligation is created when a customer under a transportation contract or public tariff submits a bill of lading to us for the transport of goods. These performance obligations are satisfied as the shipments move from origin to destination. As such, transportation revenues are recognized proportionally as a shipment moves, and related expenses are recognized as incurred. These performance obligations are generally short-term in nature with transit days averaging approximately one week or less for each commodity group. The customer has an unconditional obligation to pay for the service once the service has been completed. Estimated revenues associated with in-process shipments at period-end are recorded based on the estimated percentage of service completed. We had no material remaining performance obligations at September 30, 2022 and December 31, 2021.

We may provide customers ancillary services, such as switching, demurrage and other incidental activities, under their transportation contracts. These are distinct performance obligations that are recognized at a point in time when the services are performed or as contractual obligations are met. These revenues are included within each of the commodity groups and represent a percentage of total “Railway operating revenues” on the Consolidated Statements of Income as follows: 7% for the third quarters of 2022 and 2021, and the first nine months of 2022, and 6% for the first nine months of 2021.
Revenues related to interline transportation services that involve another railroad are reported on a net basis. Therefore, the portion of the amount that relates to another party is not reflected in revenues.

Under the typical terms of our freight contracts, payment for services is due within fifteen days of billing the customer, thus there are no significant financing components. “Accounts receivable – net” on the Consolidated Balance Sheets includes both customer and non-customer receivables as follows:

September 30,
2022
December 31, 2021
($ in millions)
Customer$901 $741 
Non-customer250 235 
  Accounts receivable – net$1,151 $976 

Non-customer receivables include non-revenue related amounts due from other railroads, governmental entities, and others. There were no non-current customer receivables at September 30, 2022, while “Other assets” on the Consolidated Balance Sheets included $23 million at December 31, 2021. We do not have any material contract assets or liabilities at September 30, 2022 and December 31, 2021.