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REVENUE - Receivables from Customers (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customers $ 1,271 $ 1,455
Less: Uncollectible Reserve 85 137
Receivable 1,186 1,318
Billed Revenues    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customers 625 674
Unbilled Revenues    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Customers $ 646 $ 781