REGULATORY ASSETS, LIABILITIES, AND BALANCING ACCOUNTS (Long-Term Regulatory Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2022
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	$ 20,265	$ 20,188
Cost of removal obligations
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	9,680	9,488
Public purpose programs
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	1,203	1,169
Employee benefit plans
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	1,049	1,043
Transmission tower wireless licenses
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	254	257
SB 901 securitization
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	5,898	6,010	$ 5,540
Wildfire self-insurance
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	1,041	1,035
Other
Regulatory Liabilities [Line Items]
Total noncurrent regulatory liabilities	$ 1,140	$ 1,186