DERIVATIVES (Outstanding Derivative Balances) (Details) - Commodity Contract - Pacific Gas & Electric Co (Utility) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivatives And Hedging Activities [Line Items]
Netting	$ 82	$ 715
Netting	0	0
Cash Collateral	96	553
Total Derivative Balance	178	1,268
Current assets – other
Derivatives And Hedging Activities [Line Items]
Netting	134	824
Netting	(8)	(170)
Cash Collateral	50	537
Total Derivative Balance	176	1,191
Other noncurrent assets – other
Derivatives And Hedging Activities [Line Items]
Netting	280	306
Netting	0	0
Cash Collateral	0	0
Total Derivative Balance	280	306
Current liabilities – other
Derivatives And Hedging Activities [Line Items]
Gross Derivative Balance	(172)	(238)
Netting	8	170
Cash Collateral	46	16
Total Derivative Balance	(118)	(52)
Noncurrent liabilities – other
Derivatives And Hedging Activities [Line Items]
Gross Derivative Balance	(160)	(177)
Netting	0	0
Cash Collateral	0	0
Total Derivative Balance	$ (160)	$ (177)