REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2022
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	$ 15,551	$ 15,561
Pension benefits
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	672	673
Environmental compliance costs
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	1,069	1,172
Price risk management
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	156	167
Catastrophic event memorandum account
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	717	742
Wildfire-related accounts
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	1,602	1,697
Deferred income taxes
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	4,993	4,771
Financing costs
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	212	216
SB 901 securitization
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	5,175	5,194	$ 5,500
General rate case memorandum accounts
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	85	95
Other
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	$ 870	$ 834