DEBT (Schedule of Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Feb. 18, 2022	Dec. 31, 2021	Nov. 12, 2021
Debt [Line Items]
Less: current portion, net of unamortized discount and debt issuance costs	$ (2,268)		$ (4,481)
Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Less: current portion, net of unamortized discount and debt issuance costs	(2,241)		(4,455)
PG&E Corporation
Debt [Line Items]
Less: current portion, net of unamortized discount and debt issuance costs	(27)		(27)
New Debt
Debt [Line Items]
Long-term debt, net	47,742		38,225
New Debt | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Less: current portion, net of unamortized discount and debt issuance costs	0		(1,441)
Long-term debt, net	43,155		33,632
New Debt | PG&E Corporation
Debt [Line Items]
Less: current portion, net of unamortized discount and debt issuance costs	(28)		(26)
Unamortized discount/premium and debt issuance costs, net	(66)		(90)
Long-term debt, net	4,587		4,593
Term Loan, Stated Maturity 2025 | PG&E Corporation
Debt [Line Items]
Long-term debt, gross	$ 2,681		$ 2,709
Term Loan, Stated Maturity 2025 | PG&E Corporation | LIBOR
Debt [Line Items]
Stated interest rate	7.44%		3.50%
Senior Notes Due 2028 | PG&E Corporation
Debt [Line Items]
Stated interest rate	5.00%
Long-term debt, gross	$ 1,000		$ 1,000
Senior Notes Due 2030 | PG&E Corporation
Debt [Line Items]
Stated interest rate	5.25%
Long-term debt, gross	$ 1,000		1,000
First Mortgage Bonds | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Less: current portion, net of unamortized discount and debt issuance costs	(2,072)		(2,996)
Unamortized discount/premium and debt issuance costs, net	(195)		(190)
Long-term debt, net	32,135		31,816
First Mortgage Bonds, Variable, Stated Maturity 2022 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 0		$ 500
First Mortgage Bonds, Variable, Stated Maturity 2022 | Pacific Gas & Electric Co (Utility) | LIBOR
Debt [Line Items]
Stated interest rate			1.69%
First Mortgage Bonds, Stated Maturity 2022 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	1.75%
Long-term debt, gross	$ 0		$ 2,500
First Mortgage Bonds, Stated Maturity 2023 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 2,075		3,575
First Mortgage Bonds, Stated Maturity 2023 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	1.70%
First Mortgage Bonds, Stated Maturity 2023 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.25%
First Mortgage Bonds, Stated Maturity 2024 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate		3.25%
Long-term debt, gross	$ 1,800		800
Recovery Bonds		$ 1,000
First Mortgage Bonds, Stated Maturity 2024 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	3.25%
First Mortgage Bonds, Stated Maturity 2024 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	3.75%
First Mortgage Bonds, Stated Maturity 2025 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 1,925		1,475
First Mortgage Bonds, Stated Maturity 2025 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	3.45%
First Mortgage Bonds, Stated Maturity 2025 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.95%
First Mortgage Bonds, Stated Maturity 2026 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 2,551		2,551
First Mortgage Bonds, Stated Maturity 2026 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	2.95%
First Mortgage Bonds, Stated Maturity 2026 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	3.15%
First Mortgage Bonds, Stated Maturity 2027 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 3,000		2,550
First Mortgage Bonds, Stated Maturity 2027 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	2.10%
First Mortgage Bonds, Stated Maturity 2027 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	5.45%
First Mortgage Bonds, Stated Maturity 2028 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 1,975		1,975
First Mortgage Bonds, Stated Maturity 2028 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	3.00%
First Mortgage Bonds, Stated Maturity 2028 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.65%
First Mortgage Bonds, Stated Maturity 2029 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	4.20%	4.20%
Long-term debt, gross	$ 400		0
Recovery Bonds		$ 400
First Mortgage Bonds, Stated Maturity 2030 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	4.55%
Long-term debt, gross	$ 3,100		3,100
First Mortgage Bonds, Stated Maturity 2031 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 3,000		3,000
First Mortgage Bonds, Stated Maturity 2031 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	2.50%
First Mortgage Bonds, Stated Maturity 2031 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	3.25%
First Mortgage Bonds, Stated Maturity 2032 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate		4.40%
Long-term debt, gross	$ 1,050		0
Recovery Bonds		$ 450
First Mortgage Bonds, Stated Maturity 2032 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	4.40%
First Mortgage Bonds, Stated Maturity 2032 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	5.90%
First Mortgage Bonds, Stated Maturity 2040 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 2,951		2,951
First Mortgage Bonds, Stated Maturity 2040 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	3.30%
First Mortgage Bonds, Stated Maturity 2040 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.50%
First Mortgage Bonds, Stated Maturity 2041 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 700		700
First Mortgage Bonds, Stated Maturity 2041 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	4.20%
First Mortgage Bonds, Stated Maturity 2041 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.50%
First Mortgage Bonds, Stated Maturity 2042 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 750		750
First Mortgage Bonds, Stated Maturity 2042 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	3.75%
First Mortgage Bonds, Stated Maturity 2042 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.45%
First Mortgage Bonds, Stated Maturity 2043 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	4.60%
Long-term debt, gross	$ 375		375
First Mortgage Bonds, Stated Maturity 2044 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	4.75%
Long-term debt, gross	$ 675		675
First Mortgage Bonds, Stated Maturity 2045 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	4.30%
Long-term debt, gross	$ 600		600
First Mortgage Bonds, Stated Maturity 2046 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 1,050		1,050
First Mortgage Bonds, Stated Maturity 2046 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	4.00%
First Mortgage Bonds, Stated Maturity 2046 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.25%
First Mortgage Bonds, Stated Maturity 2047 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	3.95%
Long-term debt, gross	$ 850		850
First Mortgage Bonds, Stated Maturity 2050 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	$ 5,025		5,025
First Mortgage Bonds, Stated Maturity 2050 | Pacific Gas & Electric Co (Utility) | Minimum
Debt [Line Items]
Stated interest rate	3.50%
First Mortgage Bonds, Stated Maturity 2050 | Pacific Gas & Electric Co (Utility) | Maximum
Debt [Line Items]
Stated interest rate	4.95%
First Mortgage Bonds, Stated Maturity 2052 | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Stated interest rate	5.25%	5.25%
Long-term debt, gross	$ 550		0
Recovery Bonds		$ 550
Recovery Bonds | Secured Debt
Debt [Line Items]
Long-term debt, gross	9,292		860
Less: current portion, net of unamortized discount and debt issuance costs	(168)		(18)
Recovery Bonds	1,800		860	$ 860
DWR Loan
Debt [Line Items]
Long-term debt, net	312		0
Receivables Securitization Program | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Long-term debt, gross	1,184		974
Long-term debt, net	$ 1,184		$ 974
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) | LIBOR
Debt [Line Items]
Debt, average interest rate			1.30%
Receivables Securitization Program | Pacific Gas & Electric Co (Utility) | SOFR
Debt [Line Items]
Debt, average interest rate	5.10%
2 Year Term Loan | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Term Loan	$ 400		$ 0
18-Months Term Loan | Pacific Gas & Electric Co (Utility)
Debt [Line Items]
Term Loan	$ 0		$ 1,441
18-Months Term Loan | Pacific Gas & Electric Co (Utility) | LIBOR
Debt [Line Items]
Stated interest rate			2.38%
18-Months Term Loan | Pacific Gas & Electric Co (Utility) | SOFR
Debt [Line Items]
Stated interest rate	5.71%