LEASES (Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Lease Assets
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other	Other
Regulatory and Other Assets, Other	$ 7	$ 8
Lease Liabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other	Other
Current Liabilities, Other	$ 1	$ 1
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other	Other
Regulatory and Other Liabilities, Other	$ 6	$ 7