DERIVATIVES (Outstanding Derivative Balances) (Details) - Commodity Contract - Pacific Gas & Electric Co (Utility) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivatives And Hedging Activities [Line Items]
Netting	$ 142	$ 715
Netting	0	0
Cash Collateral	48	553
Total Derivative Balance	190	1,268
Current assets – other
Derivatives And Hedging Activities [Line Items]
Netting	147	824
Netting	(11)	(170)
Cash Collateral	31	537
Total Derivative Balance	167	1,191
Other noncurrent assets – other
Derivatives And Hedging Activities [Line Items]
Netting	239	306
Netting	0	0
Cash Collateral	0	0
Total Derivative Balance	239	306
Current liabilities – other
Derivatives And Hedging Activities [Line Items]
Gross Derivative Balance	(80)	(238)
Netting	11	170
Cash Collateral	16	16
Total Derivative Balance	(53)	(52)
Noncurrent liabilities – other
Derivatives And Hedging Activities [Line Items]
Gross Derivative Balance	(164)	(177)
Netting	0	0
Cash Collateral	1	0
Total Derivative Balance	$ (163)	$ (177)