FAIR VALUE MEASUREMENTS (Schedule of Unrealized Gains Losses Related to Available-for-sale Investments) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amount primarily related to deferred taxes on appreciation of investment value	$ 766	$ 717
Nuclear decommissioning trusts
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,658	2,536
Total Unrealized Gains	1,946	1,852
Total Unrealized Losses	(98)	(97)
Total Fair Value	4,506	4,291
Nuclear decommissioning trusts | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	38	52
Total Unrealized Gains	0	0
Total Unrealized Losses	0	0
Total Fair Value	38	52
Nuclear decommissioning trusts | Global equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	361	381
Total Unrealized Gains	1,918	1,792
Total Unrealized Losses	(11)	(11)
Total Fair Value	2,268	2,162
Nuclear decommissioning trusts | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,259	2,103
Total Unrealized Gains	28	60
Total Unrealized Losses	(87)	(86)
Total Fair Value	2,200	2,077
Customer credit trust
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	492	216
Total Unrealized Gains	15	18
Total Unrealized Losses	(2)	(1)
Total Fair Value	505	233
Customer credit trust | Short-term investments
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	348	49
Total Unrealized Gains	0	0
Total Unrealized Losses	0	0
Total Fair Value	348	49
Customer credit trust | Global equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	35	56
Total Unrealized Gains	15	16
Total Unrealized Losses	(1)	(1)
Total Fair Value	49	71
Customer credit trust | Fixed-income securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	109	111
Total Unrealized Gains	0	2
Total Unrealized Losses	(1)	0
Total Fair Value	$ 108	$ 113