FAIR VALUE MEASUREMENTS (Schedule of Maturities on Debt Securities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	$ 4,580	$ 4,291
Nuclear decommissioning trusts | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	35
1–5 years	742
5–10 years	517
More than 10 years	983
Total maturities of fixed-income securities	2,277	2,077
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	377	233
Customer credit trust | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	0
1–5 years	44
5–10 years	36
More than 10 years	110
Total maturities of fixed-income securities	$ 190	$ 113