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SUPPLEMENTARY FINANCIAL STATEMENT INFORMATION - Allowance for Credit Losses (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Allowance for credit losses as of beginning of period $ (4) $ (4)
Increase in allowance (3) (1)
Allowance for credit losses as of end of period $ (7) $ (5)