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Revenues
6 Months Ended
Jun. 30, 2022
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)2022202120222021
Chemicals$666 $606 $1,284 $1,186 
Agricultural and Food Products412 370 799 719 
Automotive268 216 495 452 
Forest Products251 233 479 453 
Metals and Equipment216 204 413 390 
Minerals170 152 314 277 
Fertilizers118 122 238 244 
Total Merchandise2,101 1,903 4,022 3,721 
Intermodal602 511 1,129 979 
Coal651 423 1,184 807 
Trucking(a)
259 — 489 — 
Other202 153 404 296 
Total$3,815 $2,990 $7,228 $5,803 
(a) Effective third quarter 2021, Trucking revenue is comprised of revenue from the operations of Quality Carriers, which was acquired by CSX effective July 1, 2021.
NOTE 8.     Revenues, continued

Revenue Recognition
The Company generates revenue from rail freight billings under contracts with customers generally on a rate per carload, container or ton-basis based on length of haul and commodities carried. The Company’s performance obligation arises when it receives a bill of lading (“BOL”) to transport a customer's commodities at a negotiated price contained in a transportation services agreement or a publicly disclosed tariff rate. Once a BOL is received, a contract is formed whereby the parties are committed to perform, collectability of consideration is probable and the rights of the parties, shipping terms and conditions, and payment terms are identified. A customer may submit several BOLs for transportation services at various times throughout a service agreement term but each shipment represents a distinct service that is a separately identified performance obligation.

The average transit time to complete a rail shipment is between 2 to 8 days depending on market. Payments for transportation services are normally billed once a BOL is received and are generally due within 15 days after the invoice date. The Company recognizes revenue over transit time of freight as it moves from origin to destination. Revenue for services started but not completed at the reporting date is allocated based on the relative transit time in each reporting period, with the portion allocated for services subsequent to the reporting date considered remaining performance obligations.

The certain key estimates included in the recognition and measurement of revenue and related accounts receivable are as follows:

revenue associated with shipments in transit, which is recognized ratably over transit time and is based on average cycle times to move commodities and products from their origin to their final destination or interchange;
adjustments to revenue for billing corrections and billing discounts;
adjustments to revenue for overcharge claims filed by customers, which are based on historical payments to customers for rate overcharges as a percentage of total billing; and
incentive-based refunds to customers, which are primarily volume-related, are recorded as a reduction to revenue on the basis of the projected liability (this estimate is based on historical activity, current volume levels and forecasted future volume).

Revenue related to interline transportation services that involve the services of another party, such as another railroad, is reported on a net basis. The portion of the gross amount billed to customers that is remitted by the Company to another party is not reflected as revenue.

Effective third quarter 2021, trucking revenue includes revenue from the operations of Quality Carriers. This revenue is mostly comprised of truck shipments of chemicals and is recorded ratably over transit time.

Other revenue is recorded upon completion of the service and is comprised of revenue from regional subsidiary railroads and incidental charges, including intermodal storage and equipment usage, demurrage and switching. Revenue from regional subsidiary railroads includes shipments by railroads that the Company does not directly operate. Intermodal storage represents charges for customer storage of containers at an intermodal terminal, ramp facility or offsite location beyond a specified period of time. Demurrage represents charges assessed when freight cars are held by a customer beyond a specified period of time. Switching represents charges assessed when a railroad switches cars for a customer or another railroad.
NOTE 8.     Revenues, continued

During the second quarters and six months 2022 and 2021, revenue recognized from performance obligations related to prior periods (for example, due to changes in transaction price) was not material.

Remaining Performance Obligations
Remaining performance obligations represent the transaction price allocated to future reporting periods for freight services started but not completed at the reporting date. This includes the unearned portion of billed and unbilled amounts for cancellable freight shipments in transit. The Company expects to recognize the unearned portion of revenue for freight services in transit within one week of the reporting date. As of June 30, 2022, remaining performance obligations were not material.

Contract Balances and Accounts Receivable
The timing of revenue recognition, billings and cash collections results in accounts receivable and customer advances and deposits (contract liabilities) on the consolidated balance sheets. Contract assets, contract liabilities and deferred contract costs recorded on the consolidated balance sheet as of June 30, 2022, were not material.

The Company’s accounts receivable - net consists of freight and non-freight receivables, reduced by an allowance for credit losses.
(Dollars in millions)June 30,
2022
December 31,
2021
Freight Receivables $1,142 $951 
Freight Allowance for Credit Losses(14)(14)
Freight Receivables, net1,128 937 
Non-Freight Receivables 375 225 
Non-Freight Allowance for Credit Losses(14)(14)
Non-Freight Receivables, net 361 211 
Total Accounts Receivable, net$1,489 $1,148 

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. At June 30, 2022, non-freight receivables include a $124 million receivable related to the sale of property rights to the Commonwealth of Virginia. See Note 1, Nature of Operations and Significant Accounting Policies, for more details about this transaction. 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 2022 and 2021.