FAIR VALUE MEASUREMENTS (Schedule of Maturities on Debt Securities) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	$ 4,598	$ 4,580
Nuclear decommissioning trusts | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	11
1–5 years	777
5–10 years	534
More than 10 years	1,011
Total maturities of fixed-income securities	2,333	2,277
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	949	377
Customer credit trust | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	0
1–5 years	124
5–10 years	144
More than 10 years	200
Total maturities of fixed-income securities	$ 468	$ 190