FAIR VALUE MEASUREMENTS (Schedule of Activity for Debt and Equity Securities) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Proceeds from sales and maturities of nuclear decommissioning trust investments	$ 948	$ 401	$ 1,369	$ 952
Gross realized gains on securities	81	74	137	129
Gross realized losses on securities	$ (58)	$ (3)	$ (65)	$ (16)