FAIR VALUE MEASUREMENTS (Schedule of Maturities on Debt Securities) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	$ 4,506	$ 4,291
Nuclear decommissioning trusts | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	9
1–5 years	713
5–10 years	516
More than 10 years	962
Total maturities of fixed-income securities	2,200	2,077
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	505	233
Customer credit trust | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	0
1–5 years	16
5–10 years	27
More than 10 years	65
Total maturities of fixed-income securities	$ 108	$ 113