REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Jun. 30, 2022
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	$ 20,061	$ 19,417
Cost of removal obligations
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	9,339	8,943
Public purpose programs
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	1,183	1,112
Employee benefit plans
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	1,103	1,088
Transmission tower wireless licenses
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	270	306
SFGO sale
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	20	79
SB 901 securitization
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	6,103	6,295	$ 5,540
Wildfire self-insurance
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	817	804
Other
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	$ 1,226	$ 790