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REVENUES
 9 Months Ended
Sep. 30, 2023
Revenue from Contract with Customer [Abstract]  
Revenue from Contract with Customer REVENUES
Contract Assets and Contract Liabilities - Our contract asset balances at the beginning and end of the period primarily relate to our firm service transportation contracts with tiered rates, which are not material. The following table sets forth the balances in contract liabilities for the periods indicated:

Contract Liabilities
(Millions of dollars)
Balance at December 31, 2022 (a)$52 
Revenue recognized included in beginning balance(22)
Net additions (b)141 
Balance at September 30, 2023 (c)$171 
(a) - Contract liabilities of $23 million and $29 million are included in other current liabilities and other deferred credits, respectively, in our Consolidated Balance Sheet.
(b) - Net additions include increases due to the Magellan Acquisition, which are primarily related to customer prepayments for services.
(c) - Contract liabilities of $128 million and $43 million are included in the other current liabilities and other deferred credits, respectively in our Consolidated Balance Sheet.

Receivables from Customers and Revenue Disaggregation - Substantially all of the balances in accounts receivable on our Consolidated Balance Sheets at September 30, 2023, and December 31, 2022, relate to customer receivables. Revenue sources are disaggregated in Note M.

Unsatisfied Performance Obligations - We do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) variable consideration on contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

The following table presents aggregate value allocated to unsatisfied performance obligations as of September 30, 2023, and the amounts we expect to recognize in revenue in future periods, related primarily to firm transportation and storage contracts with remaining contract terms ranging from one month to 21 years:
Expected Period of Recognition in Revenue
(Millions of dollars)
Remainder of 2023$291 
20241,125 
2025873 
2026708 
2027 and beyond2,281 
Total $5,278 

The table above excludes variable consideration allocated entirely to wholly unsatisfied performance obligations, wholly unsatisfied promises to transfer distinct goods or services that are part of a single performance obligation and consideration we determine to be fully constrained. The amounts we determined to be fully constrained relate to future sales obligations under long-term sales contracts where the value is not known and minimum volume agreements, which we consider to be fully constrained until invoiced.