ORGANIZATION AND BASIS OF PRESENTATION - Property, Plant and Equipment Balances (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment
In Service	$ 50,107	$ 47,850
Accum. Depr.	(13,811)	(13,258)
Net Plant	36,296	34,592
CWIP	2,116	1,693
Total	38,412	36,285
Finance leases	68	105
Financing lease, accumulated amortization	33	60
Regulated Distribution
Property, Plant and Equipment
In Service	33,453	32,257
Accum. Depr.	(10,039)	(9,636)
Net Plant	23,414	22,621
CWIP	860	828
Total	24,274	23,449
Regulated Transmission
Property, Plant and Equipment
In Service	15,538	14,468
Accum. Depr.	(3,178)	(2,978)
Net Plant	12,360	11,490
CWIP	1,208	818
Total	13,568	12,308
Corporate/Other
Property, Plant and Equipment
In Service	1,116	1,125
Accum. Depr.	(594)	(644)
Net Plant	522	481
CWIP	48	47
Total	$ 570	$ 528