ORGANIZATION AND BASIS OF PRESENTATION - Property, Plant and Equipment Balances (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment
In Service	$ 47,850	$ 46,002
Accum. Depr.	(13,258)	(12,672)
Net Plant	34,592	33,330
CWIP	1,693	1,414
Total	36,285	34,744
Finance leases	105	143
Regulated Distribution
Property, Plant and Equipment
In Service	32,257	31,154
Accum. Depr.	(9,636)	(9,284)
Net Plant	22,621	21,870
CWIP	828	774
Total	23,449	22,644
Regulated Transmission
Property, Plant and Equipment
In Service	14,468	13,744
Accum. Depr.	(2,978)	(2,789)
Net Plant	11,490	10,955
CWIP	818	580
Total	12,308	11,535
Corporate/Other
Property, Plant and Equipment
In Service	1,125	1,104
Accum. Depr.	(644)	(599)
Net Plant	481	505
CWIP	47	60
Total	$ 528	$ 565