REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Jun. 30, 2022
Regulatory Assets [Line Items]
Regulatory assets	$ 15,584	$ 17,189
Pension benefits
Regulatory Assets [Line Items]
Regulatory assets	321	348
Environmental compliance costs
Regulatory Assets [Line Items]
Regulatory assets	1,176	1,218
Price risk management
Regulatory Assets [Line Items]
Regulatory assets	167	160
Catastrophic event memorandum account
Regulatory Assets [Line Items]
Regulatory assets	766	1,074
Wildfire-related accounts
Regulatory Assets [Line Items]
Regulatory assets	2,133	2,915
Deferred income taxes
Regulatory Assets [Line Items]
Regulatory assets	4,241	3,543
Financing costs
Regulatory Assets [Line Items]
Regulatory assets	220	196
SB 901 securitization
Regulatory Assets [Line Items]
Regulatory assets	5,201	5,249	$ 5,500
General rate case memorandum accounts
Regulatory Assets [Line Items]
Regulatory assets	395	1,291
Other
Regulatory Assets [Line Items]
Regulatory assets	$ 964	$ 1,195