REVENUE - Receivables from Customers (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	$ 1,455	$ 1,192
Less — Allowance for uncollectible customer receivables	137	159
Customers	1,318	1,033
Billed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	674	616
Billed | Financial Asset, Greater than 30 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	290	318
Unbilled
Accounts, Notes, Loans and Financing Receivable [Line Items]
Customers	$ 781	$ 576