SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Wildfire Fund (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2024	Jul. 12, 2019
Public Utility, Property, Plant and Equipment [Line Items]
Litigation liability, current	$ 193
Wildfire Fund asset	301	$ 450
Litigation contribution, net	4,100
Amortization and accretion	383	567	$ 477
Pacific Gas & Electric Co (Utility)
Public Utility, Property, Plant and Equipment [Line Items]
Wildfire Fund asset	301	450
Amortization and accretion	383	$ 567	$ 477
Other Current Liabilities
Public Utility, Property, Plant and Equipment [Line Items]
Wildfire fund, noncurrent	$ 564
Wildfire Fund Asset
Public Utility, Property, Plant and Equipment [Line Items]
Finite-lived intangible asset, useful life				20 years	15 years