REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Jun. 30, 2022
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	$ 16,283	$ 15,561
Pension benefits
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	693	673
Environmental compliance costs
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	1,138	1,172
Price risk management
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	128	167
Catastrophic event memorandum account
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	673	742
Wildfire-related accounts
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	1,734	1,697
Deferred income taxes
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	5,737	4,771
Financing costs
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	205	216
SB 901 securitization
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	5,117	5,194	$ 5,500
General rate case memorandum accounts
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	67	95
Other
Regulatory Assets [Line Items]
Total noncurrent regulatory assets	$ 791	$ 834