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FAIR VALUE MEASUREMENTS (Schedule of Maturities on Debt Securities) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	$ 3,679	$ 4,581
Nuclear decommissioning trusts | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	19
1–5 years	619
5–10 years	411
More than 10 years	814
Total maturities of fixed-income securities	1,863	$ 2,024
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Total maturities of fixed-income securities	874
Customer credit trust | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Less than 1 year	0
1–5 years	169
5–10 years	162
More than 10 years	285
Total maturities of fixed-income securities	$ 616

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