FAIR VALUE MEASUREMENTS (Schedule of Maturities on Debt Securities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	$ 3,872	$ 4,581
Nuclear decommissioning trusts \| Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	42
1–5 years	624
5–10 years	400
More than 10 years	819
Total maturities of fixed-income securities	1,885	$ 2,024
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	745
Customer credit trust \| Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	79
1–5 years	123
5–10 years	120
More than 10 years	186
Total maturities of fixed-income securities	$ 508

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