FAIR VALUE MEASUREMENTS (Schedule of Maturities on Debt Securities) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	$ 4,831	$ 4,580
Nuclear decommissioning trusts | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	13
1–5 years	780
5–10 years	556
More than 10 years	979
Total maturities of fixed-income securities	2,328	2,277
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	935	377
Customer credit trust | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	0
1–5 years	116
5–10 years	63
More than 10 years	267
Total maturities of fixed-income securities	$ 446	$ 190