TAXES - Details of General Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
General Taxes
KWH excise	$ 189	$ 183	$ 191
State gross receipts	190	182	185
Real and personal property	571	541	504
Social security and unemployment	103	112	100
Other	20	28	28
Total general taxes	$ 1,073	$ 1,046	$ 1,008