DEBT (Outstanding Borrowings and Availability) (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Revolving Credit Facility
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 6,130,000,000
Loans Outstanding	(2,400,000,000)
Letters of Credit Outstanding	(902,000,000)
Facility Availability	2,828,000,000
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	(1,170,000,000)
Letters of Credit Outstanding	(902,000,000)
Facility Availability	2,328,000,000
Letter of credit sublimit	1,500,000,000
Receivables Securitization Program | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	1,230,000,000
Loans Outstanding	(1,230,000,000)	$ (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	1,000,000,000
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,500,000,000