FAIR VALUE MEASUREMENTS (Schedule of Unrealized Gains Losses Related to Available-for-sale Investments) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amount primarily related to deferred taxes on appreciation of investment value	$ 575	$ 783
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,521	2,439
Total Unrealized Gains	1,478	2,164
Total Unrealized Losses	(127)	(22)
Total Fair Value	3,872	4,581
Nuclear decommissioning trusts | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	117	22
Total Unrealized Gains	0	0
Total Unrealized Losses	0	0
Total Fair Value	117	22
Nuclear decommissioning trusts | Global equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	413	479
Total Unrealized Gains	1,468	2,066
Total Unrealized Losses	(11)	(10)
Total Fair Value	1,870	2,535
Nuclear decommissioning trusts | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,991	1,938
Total Unrealized Gains	10	98
Total Unrealized Losses	(116)	(12)
Total Fair Value	1,885	$ 2,024
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	754
Total Unrealized Gains	13
Total Unrealized Losses	(22)
Total Fair Value	745
Customer credit trust | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	19
Total Unrealized Gains	0
Total Unrealized Losses	0
Total Fair Value	19
Customer credit trust | Global equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	219
Total Unrealized Gains	13
Total Unrealized Losses	(14)
Total Fair Value	218
Customer credit trust | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	516
Total Unrealized Gains	0
Total Unrealized Losses	(8)
Total Fair Value	$ 508