SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	$ 99	$ 94	$ 297	$ 284
Interest cost	229	228	687	685
Expected return on plan assets	(254)	(245)	(761)	(736)
Amortization of prior service (credit)	0	(1)	(2)	(3)
Amortization of net actuarial (gain) loss	0	1	1	1
Net periodic benefit cost	74	77	222	231
Regulatory account transfer	(10)	6	(29)	19
Net periodic benefit cost	64	83	193	250
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost for benefits earned	10	10	31	29
Interest cost	17	18	53	55
Expected return on plan assets	(35)	(33)	(105)	(99)
Amortization of prior service (credit)	1	1	2	2
Amortization of net actuarial (gain) loss	(6)	(5)	(17)	(14)
Net periodic benefit cost	(13)	(9)	(36)	(27)
Regulatory account transfer	0	0	0	0
Net periodic benefit cost	$ (13)	$ (9)	$ (36)	$ (27)