SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Wildfire Fund (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Jul. 12, 2019
Public Utility, Property, Plant and Equipment [Line Items]
Litigation liability, current	$ 193
Wildfire Fund asset	301		$ 301
Litigation contribution, net	4,000
Amortization and accretion	76	$ 78
Utility
Public Utility, Property, Plant and Equipment [Line Items]
Wildfire Fund asset	301		$ 301
Amortization and accretion	76	$ 78
Other Current Liabilities
Public Utility, Property, Plant and Equipment [Line Items]
Wildfire fund, noncurrent	$ 566
Wildfire Fund Asset
Public Utility, Property, Plant and Equipment [Line Items]
Finite-lived intangible asset, useful life		20 years		15 years