RELATED PARTY AGREEMENTS AND TRANSACTIONS (Summary of Significant Related Party Transactions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Utility reveneus	$ 24,428	$ 21,680	$ 20,642
Utility expenses	21,757	19,843	18,759
Pacific Gas & Electric Co (Utility)
Related Party Transaction [Line Items]
Utility reveneus	24,428	21,680	20,642
Utility expenses	21,746	19,759	18,753
Pacific Gas & Electric Co (Utility) | Administrative services provided to PG&E Corporation | Related Party
Related Party Transaction [Line Items]
Utility reveneus	3	3	3
Pacific Gas & Electric Co (Utility) | Administrative services received from PG&E Corporation | Related Party
Related Party Transaction [Line Items]
Utility expenses	80	104	82
Pacific Gas & Electric Co (Utility) | Utility employee benefit due to PG&E Corporation | Related Party
Related Party Transaction [Line Items]
Utility expenses	$ 74	$ 85	$ 39