DEBT (Outstanding Borrowings and Availability) (Details) - USD ($)	Sep. 30, 2023	Jun. 09, 2023	Jun. 08, 2023	Dec. 31, 2022
Revolving Credit Facility
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 6,400,000,000
Loans Outstanding	(1,955,000,000)
Letters of Credit Outstanding	(647,000,000)
Facility Availability	3,798,000,000
Revolving Credit Facility | PG&E Corporation
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	500,000,000
Loans Outstanding	0
Letters of Credit Outstanding	0
Facility Availability	500,000,000
Revolving Credit Facility | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	4,400,000,000
Loans Outstanding	(455,000,000)
Letters of Credit Outstanding	(647,000,000)
Facility Availability	3,298,000,000
Letter of credit sublimit	2,000,000,000
Revolving Credit Facility | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,250,000,000	$ 1,000,000,000.0
Receivables Securitization Program | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	1,500,000,000
Loans Outstanding	(1,500,000,000)			$ (1,200,000,000)
Letters of Credit Outstanding	0
Facility Availability	0
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	1,250,000,000
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,500,000,000