DERIVATIVES (Outstanding Derivative Balances) (Details) - Commodity Contract - Pacific Gas & Electric Co (Utility) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivatives And Hedging Activities [Line Items]
Netting	$ 715	$ (42)
Netting	0	0
Cash Collateral	553	170
Total Derivative Balance	1,268	128
Current assets – other
Derivatives And Hedging Activities [Line Items]
Netting	824	58
Netting	(170)	(9)
Cash Collateral	537	152
Total Derivative Balance	1,191	201
Other noncurrent assets – other
Derivatives And Hedging Activities [Line Items]
Netting	306	169
Netting	0	0
Cash Collateral	0	0
Total Derivative Balance	306	169
Current liabilities – other
Derivatives And Hedging Activities [Line Items]
Gross Derivative Balance	(238)	(53)
Netting	170	9
Cash Collateral	16	18
Total Derivative Balance	(52)	(26)
Noncurrent liabilities – other
Derivatives And Hedging Activities [Line Items]
Gross Derivative Balance	(177)	(216)
Netting	0	0
Cash Collateral	0	0
Total Derivative Balance	$ (177)	$ (216)